./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.peg_solitaire.1.prop1-func-interl.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/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_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.peg_solitaire.1.prop1-func-interl.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/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_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/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 f4c6989e17c0a811cff5fa805af2e58eb09ee77084dd73e90bca555d046f9dd6 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 02:02:46,080 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:02:46,082 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:02:46,107 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:02:46,108 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:02:46,109 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:02:46,110 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:02:46,112 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:02:46,114 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:02:46,115 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:02:46,116 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:02:46,117 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:02:46,118 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:02:46,119 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:02:46,120 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:02:46,121 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:02:46,122 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:02:46,123 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:02:46,125 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:02:46,127 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:02:46,128 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:02:46,129 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:02:46,131 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:02:46,132 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:02:46,135 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:02:46,136 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:02:46,136 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:02:46,137 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:02:46,138 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:02:46,139 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:02:46,139 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:02:46,140 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:02:46,141 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:02:46,142 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:02:46,143 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:02:46,143 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:02:46,144 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:02:46,144 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:02:46,145 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:02:46,146 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:02:46,147 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:02:46,148 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 02:02:46,169 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:02:46,169 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:02:46,170 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:02:46,170 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:02:46,171 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:02:46,171 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:02:46,172 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:02:46,172 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:02:46,172 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:02:46,172 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:02:46,173 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:02:46,173 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:02:46,173 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:02:46,173 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:02:46,174 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:02:46,174 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:02:46,174 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:02:46,175 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:02:46,175 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:02:46,176 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:02:46,176 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:02:46,176 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:02:46,176 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:02:46,177 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:02:46,177 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:02:46,177 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:02:46,178 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:02:46,178 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:02:46,178 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:02:46,178 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:02:46,179 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:02:46,179 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:02:46,179 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:02:46,179 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:02:46,180 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:02:46,180 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:02:46,180 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:02:46,181 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:02:46,181 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_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f4c6989e17c0a811cff5fa805af2e58eb09ee77084dd73e90bca555d046f9dd6 [2022-11-03 02:02:46,499 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:02:46,529 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:02:46,532 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:02:46,533 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:02:46,534 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:02:46,535 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.peg_solitaire.1.prop1-func-interl.c [2022-11-03 02:02:46,618 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/data/f51731893/e1596c44c01d430cb43c4e5c18ffb939/FLAGffb68e1ef [2022-11-03 02:02:47,341 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:02:47,342 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.peg_solitaire.1.prop1-func-interl.c [2022-11-03 02:02:47,375 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/data/f51731893/e1596c44c01d430cb43c4e5c18ffb939/FLAGffb68e1ef [2022-11-03 02:02:47,491 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/data/f51731893/e1596c44c01d430cb43c4e5c18ffb939 [2022-11-03 02:02:47,495 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:02:47,498 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:02:47,504 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:02:47,504 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:02:47,508 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:02:47,509 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:02:47" (1/1) ... [2022-11-03 02:02:47,511 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7773e0ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:02:47, skipping insertion in model container [2022-11-03 02:02:47,511 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:02:47" (1/1) ... [2022-11-03 02:02:47,521 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:02:47,608 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:02:47,861 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_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.peg_solitaire.1.prop1-func-interl.c[1014,1027] [2022-11-03 02:02:48,246 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:02:48,254 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:02:48,265 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_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.peg_solitaire.1.prop1-func-interl.c[1014,1027] [2022-11-03 02:02:48,461 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:02:48,474 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:02:48,475 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:02:48 WrapperNode [2022-11-03 02:02:48,475 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:02:48,476 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:02:48,476 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:02:48,477 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:02:48,487 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:02:48" (1/1) ... [2022-11-03 02:02:48,546 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:02:48" (1/1) ... [2022-11-03 02:02:48,865 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 3316 [2022-11-03 02:02:48,865 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:02:48,866 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:02:48,867 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:02:48,868 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:02:48,879 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:02:48" (1/1) ... [2022-11-03 02:02:48,879 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:02:48" (1/1) ... [2022-11-03 02:02:49,003 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:02:48" (1/1) ... [2022-11-03 02:02:49,003 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:02:48" (1/1) ... [2022-11-03 02:02:49,129 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:02:48" (1/1) ... [2022-11-03 02:02:49,140 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:02:48" (1/1) ... [2022-11-03 02:02:49,158 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:02:48" (1/1) ... [2022-11-03 02:02:49,180 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:02:48" (1/1) ... [2022-11-03 02:02:49,221 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:02:49,222 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:02:49,222 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:02:49,222 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:02:49,223 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:02:48" (1/1) ... [2022-11-03 02:02:49,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:02:49,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:02:49,260 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:02:49,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:02:49,312 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:02:49,313 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:02:50,054 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:02:50,056 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:08:34,803 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:09:10,822 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:09:10,823 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 02:09:10,825 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:09:10 BoogieIcfgContainer [2022-11-03 02:09:10,825 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:09:10,828 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:09:10,828 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:09:10,838 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:09:10,838 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:02:47" (1/3) ... [2022-11-03 02:09:10,839 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@df5d21c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:09:10, skipping insertion in model container [2022-11-03 02:09:10,839 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:02:48" (2/3) ... [2022-11-03 02:09:10,841 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@df5d21c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:09:10, skipping insertion in model container [2022-11-03 02:09:10,841 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:09:10" (3/3) ... [2022-11-03 02:09:10,842 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.peg_solitaire.1.prop1-func-interl.c [2022-11-03 02:09:10,864 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:09:10,865 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:09:10,930 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:09:10,948 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;@23836358, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:09:10,950 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:09:10,957 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:10,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-03 02:09:10,964 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:09:10,964 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-03 02:09:10,965 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:09:10,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:09:10,970 INFO L85 PathProgramCache]: Analyzing trace with hash 41866383, now seen corresponding path program 1 times [2022-11-03 02:09:10,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:09:10,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393788800] [2022-11-03 02:09:10,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:09:10,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:09:11,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 02:09:11,940 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-03 02:09:12,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 02:09:12,623 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-03 02:09:12,625 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-03 02:09:12,627 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-03 02:09:12,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:09:12,634 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-03 02:09:12,639 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-03 02:09:12,682 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2022-11-03 02:09:12,701 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 02:09:12 BoogieIcfgContainer [2022-11-03 02:09:12,702 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-03 02:09:12,704 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-03 02:09:12,704 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-03 02:09:12,704 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-03 02:09:12,706 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:09:10" (3/4) ... [2022-11-03 02:09:12,709 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-03 02:09:12,709 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-03 02:09:12,711 INFO L158 Benchmark]: Toolchain (without parser) took 385212.45ms. Allocated memory was 104.9MB in the beginning and 5.1GB in the end (delta: 5.0GB). Free memory was 67.5MB in the beginning and 2.8GB in the end (delta: -2.8GB). Peak memory consumption was 2.2GB. Max. memory is 16.1GB. [2022-11-03 02:09:12,712 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 83.9MB. Free memory was 40.7MB in the beginning and 40.6MB in the end (delta: 77.0kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:09:12,713 INFO L158 Benchmark]: CACSL2BoogieTranslator took 972.02ms. Allocated memory is still 104.9MB. Free memory was 67.4MB in the beginning and 43.3MB in the end (delta: 24.1MB). Peak memory consumption was 42.5MB. Max. memory is 16.1GB. [2022-11-03 02:09:12,714 INFO L158 Benchmark]: Boogie Procedure Inliner took 389.28ms. Allocated memory was 104.9MB in the beginning and 159.4MB in the end (delta: 54.5MB). Free memory was 43.3MB in the beginning and 77.5MB in the end (delta: -34.2MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. [2022-11-03 02:09:12,720 INFO L158 Benchmark]: Boogie Preprocessor took 354.68ms. Allocated memory is still 159.4MB. Free memory was 77.5MB in the beginning and 66.4MB in the end (delta: 11.1MB). Peak memory consumption was 23.4MB. Max. memory is 16.1GB. [2022-11-03 02:09:12,721 INFO L158 Benchmark]: RCFGBuilder took 381603.64ms. Allocated memory was 159.4MB in the beginning and 5.1GB in the end (delta: 4.9GB). Free memory was 66.4MB in the beginning and 3.0GB in the end (delta: -2.9GB). Peak memory consumption was 3.1GB. Max. memory is 16.1GB. [2022-11-03 02:09:12,722 INFO L158 Benchmark]: TraceAbstraction took 1873.83ms. Allocated memory is still 5.1GB. Free memory was 3.0GB in the beginning and 2.8GB in the end (delta: 155.2MB). Peak memory consumption was 155.2MB. Max. memory is 16.1GB. [2022-11-03 02:09:12,723 INFO L158 Benchmark]: Witness Printer took 5.76ms. Allocated memory is still 5.1GB. Free memory is still 2.8GB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:09:12,733 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 83.9MB. Free memory was 40.7MB in the beginning and 40.6MB in the end (delta: 77.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 972.02ms. Allocated memory is still 104.9MB. Free memory was 67.4MB in the beginning and 43.3MB in the end (delta: 24.1MB). Peak memory consumption was 42.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 389.28ms. Allocated memory was 104.9MB in the beginning and 159.4MB in the end (delta: 54.5MB). Free memory was 43.3MB in the beginning and 77.5MB in the end (delta: -34.2MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 354.68ms. Allocated memory is still 159.4MB. Free memory was 77.5MB in the beginning and 66.4MB in the end (delta: 11.1MB). Peak memory consumption was 23.4MB. Max. memory is 16.1GB. * RCFGBuilder took 381603.64ms. Allocated memory was 159.4MB in the beginning and 5.1GB in the end (delta: 4.9GB). Free memory was 66.4MB in the beginning and 3.0GB in the end (delta: -2.9GB). Peak memory consumption was 3.1GB. Max. memory is 16.1GB. * TraceAbstraction took 1873.83ms. Allocated memory is still 5.1GB. Free memory was 3.0GB in the beginning and 2.8GB in the end (delta: 155.2MB). Peak memory consumption was 155.2MB. Max. memory is 16.1GB. * Witness Printer took 5.76ms. Allocated memory is still 5.1GB. Free memory is still 2.8GB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 20]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseComplement at line 259, overapproximation of bitwiseAnd at line 155, overapproximation of bitwiseXOr at line 254. Possible FailurePath: [L25] const SORT_1 mask_SORT_1 = (SORT_1)-1 >> (sizeof(SORT_1) * 8 - 1); [L26] const SORT_1 msb_SORT_1 = (SORT_1)1 << (1 - 1); [L28] const SORT_2 mask_SORT_2 = (SORT_2)-1 >> (sizeof(SORT_2) * 8 - 8); [L29] const SORT_2 msb_SORT_2 = (SORT_2)1 << (8 - 1); [L31] const SORT_3 mask_SORT_3 = (SORT_3)-1 >> (sizeof(SORT_3) * 8 - 24); [L32] const SORT_3 msb_SORT_3 = (SORT_3)1 << (24 - 1); [L34] const SORT_4 mask_SORT_4 = (SORT_4)-1 >> (sizeof(SORT_4) * 8 - 32); [L35] const SORT_4 msb_SORT_4 = (SORT_4)1 << (32 - 1); [L37] const SORT_2 var_5 = 0; [L38] const SORT_1 var_40 = 0; [L39] const SORT_2 var_45 = 1; [L40] const SORT_2 var_46 = 15; [L41] const SORT_2 var_53 = 0; [L42] const SORT_3 var_290 = 0; [L43] const SORT_4 var_292 = 1; [L45] SORT_1 input_51; [L46] SORT_1 input_52; [L47] SORT_1 input_54; [L48] SORT_1 input_55; [L49] SORT_1 input_56; [L50] SORT_1 input_57; [L51] SORT_1 input_67; [L52] SORT_1 input_68; [L53] SORT_1 input_69; [L54] SORT_1 input_70; [L55] SORT_1 input_71; [L56] SORT_1 input_72; [L57] SORT_1 input_84; [L58] SORT_1 input_85; [L59] SORT_1 input_86; [L60] SORT_1 input_87; [L61] SORT_1 input_99; [L62] SORT_1 input_100; [L63] SORT_1 input_101; [L64] SORT_1 input_102; [L65] SORT_1 input_112; [L66] SORT_1 input_113; [L67] SORT_1 input_114; [L68] SORT_1 input_115; [L69] SORT_1 input_116; [L70] SORT_1 input_117; [L71] SORT_1 input_129; [L72] SORT_1 input_130; [L73] SORT_1 input_131; [L74] SORT_1 input_132; [L75] SORT_1 input_133; [L76] SORT_1 input_134; [L77] SORT_1 input_152; [L78] SORT_1 input_153; [L79] SORT_1 input_154; [L80] SORT_1 input_155; [L81] SORT_1 input_173; [L82] SORT_1 input_174; [L83] SORT_1 input_175; [L84] SORT_1 input_176; [L85] SORT_1 input_188; [L86] SORT_1 input_189; [L87] SORT_1 input_201; [L88] SORT_1 input_202; [L89] SORT_1 input_248; [L90] SORT_1 input_249; [L91] SORT_1 input_259; [L92] SORT_1 input_260; [L94] SORT_2 state_6 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L95] SORT_2 state_8 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L96] SORT_2 state_10 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L97] SORT_2 state_12 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L98] SORT_2 state_14 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L99] SORT_2 state_16 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L100] SORT_2 state_18 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L101] SORT_2 state_20 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L102] SORT_2 state_22 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L103] SORT_2 state_24 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L104] SORT_2 state_26 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L105] SORT_2 state_28 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L106] SORT_2 state_30 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L107] SORT_2 state_32 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L108] SORT_2 state_34 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L109] SORT_2 state_36 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L110] SORT_2 state_38 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L111] SORT_1 state_41 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L112] SORT_1 state_43 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L114] SORT_2 init_7_arg_1 = var_5; [L115] state_6 = init_7_arg_1 [L116] SORT_2 init_9_arg_1 = var_5; [L117] state_8 = init_9_arg_1 [L118] SORT_2 init_11_arg_1 = var_5; [L119] state_10 = init_11_arg_1 [L120] SORT_2 init_13_arg_1 = var_5; [L121] state_12 = init_13_arg_1 [L122] SORT_2 init_15_arg_1 = var_5; [L123] state_14 = init_15_arg_1 [L124] SORT_2 init_17_arg_1 = var_5; [L125] state_16 = init_17_arg_1 [L126] SORT_2 init_19_arg_1 = var_5; [L127] state_18 = init_19_arg_1 [L128] SORT_2 init_21_arg_1 = var_5; [L129] state_20 = init_21_arg_1 [L130] SORT_2 init_23_arg_1 = var_5; [L131] state_22 = init_23_arg_1 [L132] SORT_2 init_25_arg_1 = var_5; [L133] state_24 = init_25_arg_1 [L134] SORT_2 init_27_arg_1 = var_5; [L135] state_26 = init_27_arg_1 [L136] SORT_2 init_29_arg_1 = var_5; [L137] state_28 = init_29_arg_1 [L138] SORT_2 init_31_arg_1 = var_5; [L139] state_30 = init_31_arg_1 [L140] SORT_2 init_33_arg_1 = var_5; [L141] state_32 = init_33_arg_1 [L142] SORT_2 init_35_arg_1 = var_5; [L143] state_34 = init_35_arg_1 [L144] SORT_2 init_37_arg_1 = var_5; [L145] state_36 = init_37_arg_1 [L146] SORT_2 init_39_arg_1 = var_5; [L147] state_38 = init_39_arg_1 [L148] SORT_1 init_42_arg_1 = var_40; [L149] state_41 = init_42_arg_1 [L150] SORT_1 init_44_arg_1 = var_40; [L151] state_43 = init_44_arg_1 VAL [init_11_arg_1=0, init_13_arg_1=0, init_15_arg_1=0, init_17_arg_1=0, init_19_arg_1=0, init_21_arg_1=0, init_23_arg_1=0, init_25_arg_1=0, init_27_arg_1=0, init_29_arg_1=0, init_31_arg_1=0, init_33_arg_1=0, init_35_arg_1=0, init_37_arg_1=0, init_39_arg_1=0, init_42_arg_1=0, init_44_arg_1=0, init_7_arg_1=0, init_9_arg_1=0, mask_SORT_1=1, mask_SORT_2=255, mask_SORT_3=4294967295, mask_SORT_4=4294967295, msb_SORT_1=1, msb_SORT_2=128, msb_SORT_3=8388608, msb_SORT_4=2147483648, state_10=0, state_12=0, state_14=0, state_16=0, state_18=0, state_20=0, state_22=0, state_24=0, state_26=0, state_28=0, state_30=0, state_32=0, state_34=0, state_36=0, state_38=0, state_41=0, state_43=0, state_6=0, state_8=0, var_290=0, var_292=1, var_40=0, var_45=1, var_46=15, var_5=0, var_53=0] [L154] input_51 = __VERIFIER_nondet_uchar() [L155] input_51 = input_51 & mask_SORT_1 [L156] input_52 = __VERIFIER_nondet_uchar() [L157] input_52 = input_52 & mask_SORT_1 [L158] input_54 = __VERIFIER_nondet_uchar() [L159] input_54 = input_54 & mask_SORT_1 [L160] input_55 = __VERIFIER_nondet_uchar() [L161] input_55 = input_55 & mask_SORT_1 [L162] input_56 = __VERIFIER_nondet_uchar() [L163] input_56 = input_56 & mask_SORT_1 [L164] input_57 = __VERIFIER_nondet_uchar() [L165] input_57 = input_57 & mask_SORT_1 [L166] input_67 = __VERIFIER_nondet_uchar() [L167] input_67 = input_67 & mask_SORT_1 [L168] input_68 = __VERIFIER_nondet_uchar() [L169] input_68 = input_68 & mask_SORT_1 [L170] input_69 = __VERIFIER_nondet_uchar() [L171] input_69 = input_69 & mask_SORT_1 [L172] input_70 = __VERIFIER_nondet_uchar() [L173] input_70 = input_70 & mask_SORT_1 [L174] input_71 = __VERIFIER_nondet_uchar() [L175] input_71 = input_71 & mask_SORT_1 [L176] input_72 = __VERIFIER_nondet_uchar() [L177] input_72 = input_72 & mask_SORT_1 [L178] input_84 = __VERIFIER_nondet_uchar() [L179] input_84 = input_84 & mask_SORT_1 [L180] input_85 = __VERIFIER_nondet_uchar() [L181] input_85 = input_85 & mask_SORT_1 [L182] input_86 = __VERIFIER_nondet_uchar() [L183] input_86 = input_86 & mask_SORT_1 [L184] input_87 = __VERIFIER_nondet_uchar() [L185] input_87 = input_87 & mask_SORT_1 [L186] input_99 = __VERIFIER_nondet_uchar() [L187] input_99 = input_99 & mask_SORT_1 [L188] input_100 = __VERIFIER_nondet_uchar() [L189] input_100 = input_100 & mask_SORT_1 [L190] input_101 = __VERIFIER_nondet_uchar() [L191] input_101 = input_101 & mask_SORT_1 [L192] input_102 = __VERIFIER_nondet_uchar() [L193] input_102 = input_102 & mask_SORT_1 [L194] input_112 = __VERIFIER_nondet_uchar() [L195] input_112 = input_112 & mask_SORT_1 [L196] input_113 = __VERIFIER_nondet_uchar() [L197] input_113 = input_113 & mask_SORT_1 [L198] input_114 = __VERIFIER_nondet_uchar() [L199] input_114 = input_114 & mask_SORT_1 [L200] input_115 = __VERIFIER_nondet_uchar() [L201] input_115 = input_115 & mask_SORT_1 [L202] input_116 = __VERIFIER_nondet_uchar() [L203] input_116 = input_116 & mask_SORT_1 [L204] input_117 = __VERIFIER_nondet_uchar() [L205] input_117 = input_117 & mask_SORT_1 [L206] input_129 = __VERIFIER_nondet_uchar() [L207] input_129 = input_129 & mask_SORT_1 [L208] input_130 = __VERIFIER_nondet_uchar() [L209] input_130 = input_130 & mask_SORT_1 [L210] input_131 = __VERIFIER_nondet_uchar() [L211] input_131 = input_131 & mask_SORT_1 [L212] input_132 = __VERIFIER_nondet_uchar() [L213] input_132 = input_132 & mask_SORT_1 [L214] input_133 = __VERIFIER_nondet_uchar() [L215] input_133 = input_133 & mask_SORT_1 [L216] input_134 = __VERIFIER_nondet_uchar() [L217] input_134 = input_134 & mask_SORT_1 [L218] input_152 = __VERIFIER_nondet_uchar() [L219] input_152 = input_152 & mask_SORT_1 [L220] input_153 = __VERIFIER_nondet_uchar() [L221] input_153 = input_153 & mask_SORT_1 [L222] input_154 = __VERIFIER_nondet_uchar() [L223] input_154 = input_154 & mask_SORT_1 [L224] input_155 = __VERIFIER_nondet_uchar() [L225] input_155 = input_155 & mask_SORT_1 [L226] input_173 = __VERIFIER_nondet_uchar() [L227] input_173 = input_173 & mask_SORT_1 [L228] input_174 = __VERIFIER_nondet_uchar() [L229] input_174 = input_174 & mask_SORT_1 [L230] input_175 = __VERIFIER_nondet_uchar() [L231] input_175 = input_175 & mask_SORT_1 [L232] input_176 = __VERIFIER_nondet_uchar() [L233] input_176 = input_176 & mask_SORT_1 [L234] input_188 = __VERIFIER_nondet_uchar() [L235] input_188 = input_188 & mask_SORT_1 [L236] input_189 = __VERIFIER_nondet_uchar() [L237] input_189 = input_189 & mask_SORT_1 [L238] input_201 = __VERIFIER_nondet_uchar() [L239] input_201 = input_201 & mask_SORT_1 [L240] input_202 = __VERIFIER_nondet_uchar() [L241] input_202 = input_202 & mask_SORT_1 [L242] input_248 = __VERIFIER_nondet_uchar() [L243] input_248 = input_248 & mask_SORT_1 [L244] input_249 = __VERIFIER_nondet_uchar() [L245] input_249 = input_249 & mask_SORT_1 [L246] input_259 = __VERIFIER_nondet_uchar() [L247] input_259 = input_259 & mask_SORT_1 [L248] input_260 = __VERIFIER_nondet_uchar() [L249] input_260 = input_260 & mask_SORT_1 [L252] SORT_2 var_47_arg_0 = var_46; [L253] SORT_2 var_47_arg_1 = state_38; [L254] SORT_2 var_47 = var_47_arg_0 ^ var_47_arg_1; [L255] var_47 = var_47 & mask_SORT_2 [L256] SORT_2 var_48_arg_0 = var_45; [L257] SORT_2 var_48_arg_1 = var_47; [L258] SORT_1 var_48 = var_48_arg_0 == var_48_arg_1; [L259] SORT_1 var_49_arg_0 = ~state_43; [L260] var_49_arg_0 = var_49_arg_0 & mask_SORT_1 [L261] SORT_1 var_49_arg_1 = var_48; [L262] SORT_1 var_49 = var_49_arg_0 & var_49_arg_1; [L263] var_49 = var_49 & mask_SORT_1 [L264] SORT_1 bad_50_arg_0 = var_49; [L265] CALL __VERIFIER_assert(!(bad_50_arg_0)) [L20] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L20] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.7s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=7occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 4 NumberOfCodeBlocks, 4 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-11-03 02:09:12,806 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/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_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.peg_solitaire.1.prop1-func-interl.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/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_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/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 f4c6989e17c0a811cff5fa805af2e58eb09ee77084dd73e90bca555d046f9dd6 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 02:09:15,332 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:09:15,334 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:09:15,370 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:09:15,371 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:09:15,374 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:09:15,377 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:09:15,381 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:09:15,387 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:09:15,397 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:09:15,398 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:09:15,399 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:09:15,400 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:09:15,402 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:09:15,404 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:09:15,406 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:09:15,407 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:09:15,408 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:09:15,410 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:09:15,414 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:09:15,415 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:09:15,417 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:09:15,418 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:09:15,419 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:09:15,422 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:09:15,422 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:09:15,422 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:09:15,423 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:09:15,424 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:09:15,425 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:09:15,425 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:09:15,426 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:09:15,427 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:09:15,428 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:09:15,429 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:09:15,429 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:09:15,430 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:09:15,430 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:09:15,430 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:09:15,431 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:09:15,432 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:09:15,433 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2022-11-03 02:09:15,455 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:09:15,456 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:09:15,456 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:09:15,456 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:09:15,457 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:09:15,457 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:09:15,457 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:09:15,458 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:09:15,458 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:09:15,458 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:09:15,458 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:09:15,459 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:09:15,459 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:09:15,460 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:09:15,460 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:09:15,460 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:09:15,460 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:09:15,461 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 02:09:15,461 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 02:09:15,461 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 02:09:15,461 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:09:15,462 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:09:15,462 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:09:15,462 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:09:15,462 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 02:09:15,463 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:09:15,463 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:09:15,463 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:09:15,463 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:09:15,464 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:09:15,464 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 02:09:15,464 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 02:09:15,464 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:09:15,465 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:09:15,465 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 02:09:15,465 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_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f4c6989e17c0a811cff5fa805af2e58eb09ee77084dd73e90bca555d046f9dd6 [2022-11-03 02:09:15,845 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:09:15,873 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:09:15,878 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:09:15,879 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:09:15,880 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:09:15,882 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.peg_solitaire.1.prop1-func-interl.c [2022-11-03 02:09:15,949 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/data/0502c77ba/f8154af6eef24d66ad9202a1628463b7/FLAG42e0a9916 [2022-11-03 02:09:16,755 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:09:16,756 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.peg_solitaire.1.prop1-func-interl.c [2022-11-03 02:09:16,778 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/data/0502c77ba/f8154af6eef24d66ad9202a1628463b7/FLAG42e0a9916 [2022-11-03 02:09:16,875 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/data/0502c77ba/f8154af6eef24d66ad9202a1628463b7 [2022-11-03 02:09:16,880 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:09:16,882 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:09:16,887 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:09:16,887 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:09:16,891 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:09:16,892 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:09:16" (1/1) ... [2022-11-03 02:09:16,893 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f3569e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:09:16, skipping insertion in model container [2022-11-03 02:09:16,893 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:09:16" (1/1) ... [2022-11-03 02:09:16,909 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:09:17,005 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:09:17,175 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_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.peg_solitaire.1.prop1-func-interl.c[1014,1027] [2022-11-03 02:09:17,650 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:09:17,655 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:09:17,666 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_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.peg_solitaire.1.prop1-func-interl.c[1014,1027] [2022-11-03 02:09:17,881 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:09:17,895 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:09:17,895 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:09:17 WrapperNode [2022-11-03 02:09:17,895 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:09:17,897 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:09:17,897 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:09:17,897 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:09:17,904 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:09:17" (1/1) ... [2022-11-03 02:09:17,959 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:09:17" (1/1) ... [2022-11-03 02:09:18,097 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 3316 [2022-11-03 02:09:18,099 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:09:18,099 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:09:18,100 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:09:18,100 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:09:18,109 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:09:17" (1/1) ... [2022-11-03 02:09:18,110 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:09:17" (1/1) ... [2022-11-03 02:09:18,131 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:09:17" (1/1) ... [2022-11-03 02:09:18,132 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:09:17" (1/1) ... [2022-11-03 02:09:18,240 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:09:17" (1/1) ... [2022-11-03 02:09:18,289 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:09:17" (1/1) ... [2022-11-03 02:09:18,300 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:09:17" (1/1) ... [2022-11-03 02:09:18,327 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:09:17" (1/1) ... [2022-11-03 02:09:18,361 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:09:18,362 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:09:18,362 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:09:18,362 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:09:18,363 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:09:17" (1/1) ... [2022-11-03 02:09:18,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:09:18,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:09:18,440 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:09:18,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:09:18,507 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:09:18,507 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:09:19,358 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:09:19,360 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:09:23,326 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:09:23,337 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:09:23,338 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 02:09:23,340 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:09:23 BoogieIcfgContainer [2022-11-03 02:09:23,340 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:09:23,342 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:09:23,342 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:09:23,345 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:09:23,346 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:09:16" (1/3) ... [2022-11-03 02:09:23,346 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b6581d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:09:23, skipping insertion in model container [2022-11-03 02:09:23,347 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:09:17" (2/3) ... [2022-11-03 02:09:23,347 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b6581d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:09:23, skipping insertion in model container [2022-11-03 02:09:23,347 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:09:23" (3/3) ... [2022-11-03 02:09:23,348 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.peg_solitaire.1.prop1-func-interl.c [2022-11-03 02:09:23,366 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:09:23,367 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:09:23,423 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:09:23,429 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;@21e68267, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:09:23,429 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:09:23,435 INFO L276 IsEmpty]: Start isEmpty. Operand has 395 states, 393 states have (on average 1.4987277353689568) internal successors, (589), 394 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:23,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-03 02:09:23,441 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:09:23,442 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-03 02:09:23,442 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:09:23,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:09:23,447 INFO L85 PathProgramCache]: Analyzing trace with hash 28698761, now seen corresponding path program 1 times [2022-11-03 02:09:23,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:09:23,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1322587804] [2022-11-03 02:09:23,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:09:23,462 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:09:23,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:09:23,466 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:09:23,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 02:09:24,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:09:24,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 02:09:24,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:09:24,283 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 02:09:24,283 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:09:24,284 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:09:24,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1322587804] [2022-11-03 02:09:24,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1322587804] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:09:24,285 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:09:24,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:09:24,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724981870] [2022-11-03 02:09:24,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:09:24,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:09:24,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:09:24,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:09:24,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:09:24,333 INFO L87 Difference]: Start difference. First operand has 395 states, 393 states have (on average 1.4987277353689568) internal successors, (589), 394 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:25,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:09:25,003 INFO L93 Difference]: Finished difference Result 1172 states and 1758 transitions. [2022-11-03 02:09:25,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:09:25,006 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-03 02:09:25,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:09:25,028 INFO L225 Difference]: With dead ends: 1172 [2022-11-03 02:09:25,034 INFO L226 Difference]: Without dead ends: 779 [2022-11-03 02:09:25,041 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:09:25,048 INFO L413 NwaCegarLoop]: 523 mSDtfsCounter, 1155 mSDsluCounter, 1102 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1155 SdHoareTripleChecker+Valid, 1625 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:09:25,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1155 Valid, 1625 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 02:09:25,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2022-11-03 02:09:25,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 393. [2022-11-03 02:09:25,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 1.4923469387755102) internal successors, (585), 392 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:25,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 585 transitions. [2022-11-03 02:09:25,124 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 585 transitions. Word has length 5 [2022-11-03 02:09:25,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:09:25,125 INFO L495 AbstractCegarLoop]: Abstraction has 393 states and 585 transitions. [2022-11-03 02:09:25,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:25,126 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 585 transitions. [2022-11-03 02:09:25,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2022-11-03 02:09:25,148 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:09:25,148 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:09:25,167 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:09:25,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:09:25,366 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:09:25,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:09:25,367 INFO L85 PathProgramCache]: Analyzing trace with hash 1719665811, now seen corresponding path program 1 times [2022-11-03 02:09:25,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:09:25,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2116201780] [2022-11-03 02:09:25,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:09:25,372 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:09:25,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:09:25,373 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:09:25,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 02:09:26,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:09:26,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 2685 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:09:26,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:09:27,041 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:09:27,044 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:09:27,045 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:09:27,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2116201780] [2022-11-03 02:09:27,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2116201780] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:09:27,046 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:09:27,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:09:27,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512903551] [2022-11-03 02:09:27,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:09:27,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:09:27,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:09:27,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:09:27,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:09:27,057 INFO L87 Difference]: Start difference. First operand 393 states and 585 transitions. Second operand has 7 states, 7 states have (on average 56.0) internal successors, (392), 7 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:27,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:09:27,361 INFO L93 Difference]: Finished difference Result 800 states and 1193 transitions. [2022-11-03 02:09:27,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:09:27,363 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 56.0) internal successors, (392), 7 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 392 [2022-11-03 02:09:27,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:09:27,365 INFO L225 Difference]: With dead ends: 800 [2022-11-03 02:09:27,365 INFO L226 Difference]: Without dead ends: 411 [2022-11-03 02:09:27,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 386 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:09:27,367 INFO L413 NwaCegarLoop]: 577 mSDtfsCounter, 30 mSDsluCounter, 2303 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 2880 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:09:27,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 2880 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 19 Unchecked, 0.3s Time] [2022-11-03 02:09:27,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2022-11-03 02:09:27,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 411. [2022-11-03 02:09:27,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 1.4902439024390244) internal successors, (611), 410 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:27,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 611 transitions. [2022-11-03 02:09:27,390 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 611 transitions. Word has length 392 [2022-11-03 02:09:27,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:09:27,394 INFO L495 AbstractCegarLoop]: Abstraction has 411 states and 611 transitions. [2022-11-03 02:09:27,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 56.0) internal successors, (392), 7 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:27,396 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 611 transitions. [2022-11-03 02:09:27,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2022-11-03 02:09:27,405 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:09:27,406 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:09:27,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:09:27,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:09:27,623 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:09:27,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:09:27,624 INFO L85 PathProgramCache]: Analyzing trace with hash -553969391, now seen corresponding path program 1 times [2022-11-03 02:09:27,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:09:27,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1834164186] [2022-11-03 02:09:27,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:09:27,626 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:09:27,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:09:27,627 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:09:27,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 02:09:28,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:09:29,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 2685 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:09:29,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:09:29,418 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:09:29,418 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:09:29,418 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:09:29,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1834164186] [2022-11-03 02:09:29,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1834164186] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:09:29,421 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:09:29,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:09:29,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492687242] [2022-11-03 02:09:29,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:09:29,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:09:29,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:09:29,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:09:29,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:09:29,427 INFO L87 Difference]: Start difference. First operand 411 states and 611 transitions. Second operand has 7 states, 7 states have (on average 56.0) internal successors, (392), 7 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:29,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:09:29,691 INFO L93 Difference]: Finished difference Result 830 states and 1237 transitions. [2022-11-03 02:09:29,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:09:29,693 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 56.0) internal successors, (392), 7 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 392 [2022-11-03 02:09:29,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:09:29,695 INFO L225 Difference]: With dead ends: 830 [2022-11-03 02:09:29,695 INFO L226 Difference]: Without dead ends: 441 [2022-11-03 02:09:29,696 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 386 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:09:29,696 INFO L413 NwaCegarLoop]: 577 mSDtfsCounter, 66 mSDsluCounter, 2325 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 2902 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:09:29,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 2902 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 20 Unchecked, 0.2s Time] [2022-11-03 02:09:29,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2022-11-03 02:09:29,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 441. [2022-11-03 02:09:29,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 440 states have (on average 1.4886363636363635) internal successors, (655), 440 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:29,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 655 transitions. [2022-11-03 02:09:29,712 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 655 transitions. Word has length 392 [2022-11-03 02:09:29,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:09:29,712 INFO L495 AbstractCegarLoop]: Abstraction has 441 states and 655 transitions. [2022-11-03 02:09:29,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 56.0) internal successors, (392), 7 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:29,713 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 655 transitions. [2022-11-03 02:09:29,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2022-11-03 02:09:29,721 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:09:29,722 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:09:29,753 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:09:29,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:09:29,935 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:09:29,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:09:29,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1267790095, now seen corresponding path program 1 times [2022-11-03 02:09:29,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:09:29,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [966588271] [2022-11-03 02:09:29,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:09:29,939 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:09:29,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:09:29,940 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:09:29,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-03 02:09:31,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:09:31,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 2685 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:09:31,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:09:31,557 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:09:31,558 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:09:31,558 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:09:31,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [966588271] [2022-11-03 02:09:31,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [966588271] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:09:31,559 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:09:31,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:09:31,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346113277] [2022-11-03 02:09:31,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:09:31,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:09:31,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:09:31,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:09:31,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:09:31,562 INFO L87 Difference]: Start difference. First operand 441 states and 655 transitions. Second operand has 7 states, 7 states have (on average 56.0) internal successors, (392), 7 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:31,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:09:31,893 INFO L93 Difference]: Finished difference Result 844 states and 1257 transitions. [2022-11-03 02:09:31,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:09:31,895 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 56.0) internal successors, (392), 7 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 392 [2022-11-03 02:09:31,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:09:31,898 INFO L225 Difference]: With dead ends: 844 [2022-11-03 02:09:31,898 INFO L226 Difference]: Without dead ends: 455 [2022-11-03 02:09:31,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 386 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:09:31,899 INFO L413 NwaCegarLoop]: 576 mSDtfsCounter, 78 mSDsluCounter, 2363 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 2939 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:09:31,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 2939 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 19 Unchecked, 0.3s Time] [2022-11-03 02:09:31,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2022-11-03 02:09:31,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 455. [2022-11-03 02:09:31,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 454 states have (on average 1.486784140969163) internal successors, (675), 454 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:31,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 675 transitions. [2022-11-03 02:09:31,923 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 675 transitions. Word has length 392 [2022-11-03 02:09:31,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:09:31,924 INFO L495 AbstractCegarLoop]: Abstraction has 455 states and 675 transitions. [2022-11-03 02:09:31,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 56.0) internal successors, (392), 7 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:31,924 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 675 transitions. [2022-11-03 02:09:31,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2022-11-03 02:09:31,932 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:09:31,932 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:09:31,966 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:09:32,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:09:32,152 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:09:32,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:09:32,153 INFO L85 PathProgramCache]: Analyzing trace with hash -921862771, now seen corresponding path program 1 times [2022-11-03 02:09:32,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:09:32,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [847801408] [2022-11-03 02:09:32,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:09:32,156 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:09:32,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:09:32,158 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:09:32,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-03 02:09:33,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:09:33,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 2685 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:09:33,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:09:33,983 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:09:33,983 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:09:33,984 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:09:33,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [847801408] [2022-11-03 02:09:33,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [847801408] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:09:33,984 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:09:33,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:09:33,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327947536] [2022-11-03 02:09:33,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:09:33,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:09:33,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:09:33,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:09:33,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:09:33,995 INFO L87 Difference]: Start difference. First operand 455 states and 675 transitions. Second operand has 7 states, 7 states have (on average 56.0) internal successors, (392), 7 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:34,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:09:34,311 INFO L93 Difference]: Finished difference Result 938 states and 1397 transitions. [2022-11-03 02:09:34,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:09:34,315 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 56.0) internal successors, (392), 7 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 392 [2022-11-03 02:09:34,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:09:34,320 INFO L225 Difference]: With dead ends: 938 [2022-11-03 02:09:34,321 INFO L226 Difference]: Without dead ends: 549 [2022-11-03 02:09:34,321 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 386 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:09:34,323 INFO L413 NwaCegarLoop]: 576 mSDtfsCounter, 196 mSDsluCounter, 2867 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 3443 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:09:34,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 3443 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 17 Unchecked, 0.3s Time] [2022-11-03 02:09:34,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2022-11-03 02:09:34,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 549. [2022-11-03 02:09:34,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 548 states have (on average 1.4872262773722629) internal successors, (815), 548 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:34,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 815 transitions. [2022-11-03 02:09:34,345 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 815 transitions. Word has length 392 [2022-11-03 02:09:34,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:09:34,346 INFO L495 AbstractCegarLoop]: Abstraction has 549 states and 815 transitions. [2022-11-03 02:09:34,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 56.0) internal successors, (392), 7 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:34,346 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 815 transitions. [2022-11-03 02:09:34,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2022-11-03 02:09:34,353 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:09:34,353 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:09:34,385 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:09:34,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:09:34,566 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:09:34,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:09:34,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1137903093, now seen corresponding path program 1 times [2022-11-03 02:09:34,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:09:34,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1219168530] [2022-11-03 02:09:34,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:09:34,569 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:09:34,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:09:34,570 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:09:34,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-03 02:09:35,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:09:35,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 2685 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:09:35,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:09:36,673 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:09:36,674 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:09:36,674 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:09:36,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1219168530] [2022-11-03 02:09:36,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1219168530] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:09:36,675 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:09:36,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:09:36,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50647879] [2022-11-03 02:09:36,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:09:36,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:09:36,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:09:36,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:09:36,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:09:36,677 INFO L87 Difference]: Start difference. First operand 549 states and 815 transitions. Second operand has 7 states, 7 states have (on average 56.0) internal successors, (392), 7 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:36,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:09:36,969 INFO L93 Difference]: Finished difference Result 1126 states and 1675 transitions. [2022-11-03 02:09:36,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:09:36,973 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 56.0) internal successors, (392), 7 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 392 [2022-11-03 02:09:36,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:09:36,976 INFO L225 Difference]: With dead ends: 1126 [2022-11-03 02:09:36,976 INFO L226 Difference]: Without dead ends: 737 [2022-11-03 02:09:36,977 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 386 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:09:36,978 INFO L413 NwaCegarLoop]: 576 mSDtfsCounter, 285 mSDsluCounter, 1977 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 2553 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:09:36,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 2553 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 15 Unchecked, 0.2s Time] [2022-11-03 02:09:36,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2022-11-03 02:09:36,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 737. [2022-11-03 02:09:36,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 736 states have (on average 1.485054347826087) internal successors, (1093), 736 states have internal predecessors, (1093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:37,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 1093 transitions. [2022-11-03 02:09:37,002 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 1093 transitions. Word has length 392 [2022-11-03 02:09:37,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:09:37,003 INFO L495 AbstractCegarLoop]: Abstraction has 737 states and 1093 transitions. [2022-11-03 02:09:37,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 56.0) internal successors, (392), 7 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:37,004 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 1093 transitions. [2022-11-03 02:09:37,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2022-11-03 02:09:37,007 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:09:37,007 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:09:37,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-03 02:09:37,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:09:37,227 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:09:37,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:09:37,228 INFO L85 PathProgramCache]: Analyzing trace with hash 535686793, now seen corresponding path program 1 times [2022-11-03 02:09:37,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:09:37,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2120699795] [2022-11-03 02:09:37,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:09:37,230 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:09:37,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:09:37,231 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:09:37,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-03 02:09:38,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:09:38,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 2685 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:09:38,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:09:38,892 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:09:38,892 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:09:38,893 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:09:38,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2120699795] [2022-11-03 02:09:38,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2120699795] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:09:38,893 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:09:38,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:09:38,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499727719] [2022-11-03 02:09:38,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:09:38,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:09:38,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:09:38,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:09:38,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:09:38,896 INFO L87 Difference]: Start difference. First operand 737 states and 1093 transitions. Second operand has 7 states, 7 states have (on average 56.0) internal successors, (392), 7 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:39,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:09:39,356 INFO L93 Difference]: Finished difference Result 2008 states and 2990 transitions. [2022-11-03 02:09:39,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:09:39,357 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 56.0) internal successors, (392), 7 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 392 [2022-11-03 02:09:39,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:09:39,363 INFO L225 Difference]: With dead ends: 2008 [2022-11-03 02:09:39,363 INFO L226 Difference]: Without dead ends: 1619 [2022-11-03 02:09:39,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 386 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:09:39,365 INFO L413 NwaCegarLoop]: 808 mSDtfsCounter, 1919 mSDsluCounter, 3232 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1919 SdHoareTripleChecker+Valid, 4040 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:09:39,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1919 Valid, 4040 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 36 Unchecked, 0.4s Time] [2022-11-03 02:09:39,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1619 states. [2022-11-03 02:09:39,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1619 to 1001. [2022-11-03 02:09:39,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1001 states, 1000 states have (on average 1.485) internal successors, (1485), 1000 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:39,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1001 states to 1001 states and 1485 transitions. [2022-11-03 02:09:39,396 INFO L78 Accepts]: Start accepts. Automaton has 1001 states and 1485 transitions. Word has length 392 [2022-11-03 02:09:39,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:09:39,396 INFO L495 AbstractCegarLoop]: Abstraction has 1001 states and 1485 transitions. [2022-11-03 02:09:39,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 56.0) internal successors, (392), 7 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:39,399 INFO L276 IsEmpty]: Start isEmpty. Operand 1001 states and 1485 transitions. [2022-11-03 02:09:39,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2022-11-03 02:09:39,402 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:09:39,403 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:09:39,430 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-03 02:09:39,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:09:39,619 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:09:39,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:09:39,619 INFO L85 PathProgramCache]: Analyzing trace with hash 874189963, now seen corresponding path program 1 times [2022-11-03 02:09:39,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:09:39,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1498969799] [2022-11-03 02:09:39,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:09:39,621 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:09:39,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:09:39,622 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:09:39,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-03 02:09:40,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:09:40,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 2685 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:09:40,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:09:41,621 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:09:41,624 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:09:41,624 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:09:41,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1498969799] [2022-11-03 02:09:41,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1498969799] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:09:41,624 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:09:41,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:09:41,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176877292] [2022-11-03 02:09:41,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:09:41,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:09:41,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:09:41,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:09:41,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:09:41,627 INFO L87 Difference]: Start difference. First operand 1001 states and 1485 transitions. Second operand has 7 states, 7 states have (on average 56.0) internal successors, (392), 7 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:42,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:09:42,027 INFO L93 Difference]: Finished difference Result 1978 states and 2939 transitions. [2022-11-03 02:09:42,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:09:42,030 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 56.0) internal successors, (392), 7 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 392 [2022-11-03 02:09:42,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:09:42,035 INFO L225 Difference]: With dead ends: 1978 [2022-11-03 02:09:42,035 INFO L226 Difference]: Without dead ends: 1589 [2022-11-03 02:09:42,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 386 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:09:42,037 INFO L413 NwaCegarLoop]: 576 mSDtfsCounter, 263 mSDsluCounter, 2868 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 3444 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:09:42,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [263 Valid, 3444 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 19 Unchecked, 0.4s Time] [2022-11-03 02:09:42,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1589 states. [2022-11-03 02:09:42,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1589 to 1589. [2022-11-03 02:09:42,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1589 states, 1588 states have (on average 1.484256926952141) internal successors, (2357), 1588 states have internal predecessors, (2357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:42,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1589 states to 1589 states and 2357 transitions. [2022-11-03 02:09:42,089 INFO L78 Accepts]: Start accepts. Automaton has 1589 states and 2357 transitions. Word has length 392 [2022-11-03 02:09:42,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:09:42,089 INFO L495 AbstractCegarLoop]: Abstraction has 1589 states and 2357 transitions. [2022-11-03 02:09:42,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 56.0) internal successors, (392), 7 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:42,090 INFO L276 IsEmpty]: Start isEmpty. Operand 1589 states and 2357 transitions. [2022-11-03 02:09:42,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2022-11-03 02:09:42,094 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:09:42,095 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:09:42,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-03 02:09:42,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:09:42,319 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:09:42,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:09:42,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1538182281, now seen corresponding path program 1 times [2022-11-03 02:09:42,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:09:42,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [44860128] [2022-11-03 02:09:42,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:09:42,321 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:09:42,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:09:42,322 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:09:42,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-03 02:09:43,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:09:43,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 2685 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:09:43,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:09:44,153 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:09:44,153 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:09:44,153 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:09:44,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [44860128] [2022-11-03 02:09:44,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [44860128] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:09:44,154 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:09:44,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:09:44,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263344837] [2022-11-03 02:09:44,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:09:44,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:09:44,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:09:44,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:09:44,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:09:44,158 INFO L87 Difference]: Start difference. First operand 1589 states and 2357 transitions. Second operand has 7 states, 7 states have (on average 56.0) internal successors, (392), 7 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:44,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:09:44,508 INFO L93 Difference]: Finished difference Result 2108 states and 3130 transitions. [2022-11-03 02:09:44,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:09:44,510 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 56.0) internal successors, (392), 7 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 392 [2022-11-03 02:09:44,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:09:44,516 INFO L225 Difference]: With dead ends: 2108 [2022-11-03 02:09:44,516 INFO L226 Difference]: Without dead ends: 1719 [2022-11-03 02:09:44,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 386 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:09:44,518 INFO L413 NwaCegarLoop]: 577 mSDtfsCounter, 350 mSDsluCounter, 2523 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 3100 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:09:44,519 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [350 Valid, 3100 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 15 Unchecked, 0.3s Time] [2022-11-03 02:09:44,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1719 states. [2022-11-03 02:09:44,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1719 to 1719. [2022-11-03 02:09:44,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1719 states, 1718 states have (on average 1.4831199068684517) internal successors, (2548), 1718 states have internal predecessors, (2548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:44,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1719 states to 1719 states and 2548 transitions. [2022-11-03 02:09:44,554 INFO L78 Accepts]: Start accepts. Automaton has 1719 states and 2548 transitions. Word has length 392 [2022-11-03 02:09:44,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:09:44,554 INFO L495 AbstractCegarLoop]: Abstraction has 1719 states and 2548 transitions. [2022-11-03 02:09:44,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 56.0) internal successors, (392), 7 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:44,555 INFO L276 IsEmpty]: Start isEmpty. Operand 1719 states and 2548 transitions. [2022-11-03 02:09:44,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2022-11-03 02:09:44,560 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:09:44,560 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:09:44,590 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-03 02:09:44,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:09:44,783 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:09:44,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:09:44,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1408317703, now seen corresponding path program 1 times [2022-11-03 02:09:44,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:09:44,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [378962659] [2022-11-03 02:09:44,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:09:44,786 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:09:44,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:09:44,787 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:09:44,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-03 02:09:45,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:09:45,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 2685 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:09:45,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:09:46,455 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:09:46,455 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:09:46,455 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:09:46,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [378962659] [2022-11-03 02:09:46,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [378962659] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:09:46,456 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:09:46,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:09:46,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952097460] [2022-11-03 02:09:46,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:09:46,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:09:46,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:09:46,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:09:46,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:09:46,459 INFO L87 Difference]: Start difference. First operand 1719 states and 2548 transitions. Second operand has 7 states, 7 states have (on average 56.0) internal successors, (392), 7 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:46,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:09:46,989 INFO L93 Difference]: Finished difference Result 3300 states and 4894 transitions. [2022-11-03 02:09:46,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:09:46,990 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 56.0) internal successors, (392), 7 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 392 [2022-11-03 02:09:46,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:09:47,000 INFO L225 Difference]: With dead ends: 3300 [2022-11-03 02:09:47,000 INFO L226 Difference]: Without dead ends: 2911 [2022-11-03 02:09:47,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 386 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:09:47,002 INFO L413 NwaCegarLoop]: 856 mSDtfsCounter, 1839 mSDsluCounter, 2996 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1839 SdHoareTripleChecker+Valid, 3852 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:09:47,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1839 Valid, 3852 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 22 Unchecked, 0.4s Time] [2022-11-03 02:09:47,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2911 states. [2022-11-03 02:09:47,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2911 to 2325. [2022-11-03 02:09:47,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2325 states, 2324 states have (on average 1.4789156626506024) internal successors, (3437), 2324 states have internal predecessors, (3437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:47,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2325 states to 2325 states and 3437 transitions. [2022-11-03 02:09:47,053 INFO L78 Accepts]: Start accepts. Automaton has 2325 states and 3437 transitions. Word has length 392 [2022-11-03 02:09:47,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:09:47,053 INFO L495 AbstractCegarLoop]: Abstraction has 2325 states and 3437 transitions. [2022-11-03 02:09:47,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 56.0) internal successors, (392), 7 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:47,054 INFO L276 IsEmpty]: Start isEmpty. Operand 2325 states and 3437 transitions. [2022-11-03 02:09:47,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2022-11-03 02:09:47,059 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:09:47,060 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:09:47,091 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-03 02:09:47,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:09:47,275 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:09:47,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:09:47,276 INFO L85 PathProgramCache]: Analyzing trace with hash -559487223, now seen corresponding path program 1 times [2022-11-03 02:09:47,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:09:47,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1759863637] [2022-11-03 02:09:47,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:09:47,279 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:09:47,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:09:47,280 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:09:47,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-03 02:09:48,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:09:48,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 2685 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:09:48,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:09:48,836 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:09:48,837 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:09:48,837 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:09:48,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1759863637] [2022-11-03 02:09:48,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1759863637] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:09:48,837 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:09:48,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:09:48,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524922965] [2022-11-03 02:09:48,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:09:48,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:09:48,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:09:48,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:09:48,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:09:48,840 INFO L87 Difference]: Start difference. First operand 2325 states and 3437 transitions. Second operand has 7 states, 7 states have (on average 56.0) internal successors, (392), 7 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:49,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:09:49,365 INFO L93 Difference]: Finished difference Result 5264 states and 7793 transitions. [2022-11-03 02:09:49,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:09:49,366 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 56.0) internal successors, (392), 7 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 392 [2022-11-03 02:09:49,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:09:49,381 INFO L225 Difference]: With dead ends: 5264 [2022-11-03 02:09:49,381 INFO L226 Difference]: Without dead ends: 4875 [2022-11-03 02:09:49,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 386 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:09:49,385 INFO L413 NwaCegarLoop]: 871 mSDtfsCounter, 1436 mSDsluCounter, 4592 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1436 SdHoareTripleChecker+Valid, 5463 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:09:49,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1436 Valid, 5463 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 30 Unchecked, 0.4s Time] [2022-11-03 02:09:49,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4875 states. [2022-11-03 02:09:49,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4875 to 4299. [2022-11-03 02:09:49,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4299 states, 4298 states have (on average 1.4776640297812935) internal successors, (6351), 4298 states have internal predecessors, (6351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:49,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4299 states to 4299 states and 6351 transitions. [2022-11-03 02:09:49,481 INFO L78 Accepts]: Start accepts. Automaton has 4299 states and 6351 transitions. Word has length 392 [2022-11-03 02:09:49,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:09:49,482 INFO L495 AbstractCegarLoop]: Abstraction has 4299 states and 6351 transitions. [2022-11-03 02:09:49,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 56.0) internal successors, (392), 7 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:49,483 INFO L276 IsEmpty]: Start isEmpty. Operand 4299 states and 6351 transitions. [2022-11-03 02:09:49,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2022-11-03 02:09:49,491 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:09:49,491 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:09:49,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-03 02:09:49,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:09:49,715 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:09:49,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:09:49,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1950076811, now seen corresponding path program 1 times [2022-11-03 02:09:49,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:09:49,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1912603928] [2022-11-03 02:09:49,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:09:49,719 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:09:49,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:09:49,720 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:09:49,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-03 02:09:50,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:09:50,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 2685 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:09:50,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:09:52,014 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:09:52,014 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:09:52,015 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:09:52,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1912603928] [2022-11-03 02:09:52,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1912603928] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:09:52,015 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:09:52,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:09:52,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025496877] [2022-11-03 02:09:52,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:09:52,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:09:52,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:09:52,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:09:52,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:09:52,018 INFO L87 Difference]: Start difference. First operand 4299 states and 6351 transitions. Second operand has 7 states, 7 states have (on average 56.0) internal successors, (392), 7 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:52,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:09:52,305 INFO L93 Difference]: Finished difference Result 8456 states and 12497 transitions. [2022-11-03 02:09:52,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:09:52,307 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 56.0) internal successors, (392), 7 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 392 [2022-11-03 02:09:52,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:09:52,327 INFO L225 Difference]: With dead ends: 8456 [2022-11-03 02:09:52,328 INFO L226 Difference]: Without dead ends: 8067 [2022-11-03 02:09:52,330 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 386 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:09:52,331 INFO L413 NwaCegarLoop]: 576 mSDtfsCounter, 330 mSDsluCounter, 2868 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 3444 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:09:52,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [330 Valid, 3444 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 19 Unchecked, 0.2s Time] [2022-11-03 02:09:52,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8067 states. [2022-11-03 02:09:52,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8067 to 8067. [2022-11-03 02:09:52,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8067 states, 8066 states have (on average 1.4771881973716836) internal successors, (11915), 8066 states have internal predecessors, (11915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:52,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8067 states to 8067 states and 11915 transitions. [2022-11-03 02:09:52,466 INFO L78 Accepts]: Start accepts. Automaton has 8067 states and 11915 transitions. Word has length 392 [2022-11-03 02:09:52,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:09:52,466 INFO L495 AbstractCegarLoop]: Abstraction has 8067 states and 11915 transitions. [2022-11-03 02:09:52,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 56.0) internal successors, (392), 7 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:52,467 INFO L276 IsEmpty]: Start isEmpty. Operand 8067 states and 11915 transitions. [2022-11-03 02:09:52,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2022-11-03 02:09:52,483 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:09:52,484 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:09:52,512 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-03 02:09:52,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:09:52,703 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:09:52,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:09:52,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1528843255, now seen corresponding path program 1 times [2022-11-03 02:09:52,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:09:52,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2007502039] [2022-11-03 02:09:52,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:09:52,707 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:09:52,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:09:52,708 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:09:52,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-03 02:09:53,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:09:53,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 2685 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:09:53,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:09:54,785 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:09:54,785 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:09:54,786 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:09:54,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2007502039] [2022-11-03 02:09:54,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2007502039] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:09:54,786 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:09:54,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:09:54,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357388293] [2022-11-03 02:09:54,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:09:54,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:09:54,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:09:54,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:09:54,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:09:54,789 INFO L87 Difference]: Start difference. First operand 8067 states and 11915 transitions. Second operand has 7 states, 7 states have (on average 56.0) internal successors, (392), 7 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:55,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:09:55,199 INFO L93 Difference]: Finished difference Result 9930 states and 14612 transitions. [2022-11-03 02:09:55,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:09:55,201 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 56.0) internal successors, (392), 7 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 392 [2022-11-03 02:09:55,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:09:55,227 INFO L225 Difference]: With dead ends: 9930 [2022-11-03 02:09:55,228 INFO L226 Difference]: Without dead ends: 9541 [2022-11-03 02:09:55,232 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 386 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:09:55,232 INFO L413 NwaCegarLoop]: 577 mSDtfsCounter, 450 mSDsluCounter, 2269 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 450 SdHoareTripleChecker+Valid, 2846 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:09:55,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [450 Valid, 2846 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 15 Unchecked, 0.4s Time] [2022-11-03 02:09:55,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9541 states. [2022-11-03 02:09:55,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9541 to 9541. [2022-11-03 02:09:55,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9541 states, 9540 states have (on average 1.470649895178197) internal successors, (14030), 9540 states have internal predecessors, (14030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:55,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9541 states to 9541 states and 14030 transitions. [2022-11-03 02:09:55,378 INFO L78 Accepts]: Start accepts. Automaton has 9541 states and 14030 transitions. Word has length 392 [2022-11-03 02:09:55,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:09:55,378 INFO L495 AbstractCegarLoop]: Abstraction has 9541 states and 14030 transitions. [2022-11-03 02:09:55,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 56.0) internal successors, (392), 7 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:55,379 INFO L276 IsEmpty]: Start isEmpty. Operand 9541 states and 14030 transitions. [2022-11-03 02:09:55,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2022-11-03 02:09:55,398 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:09:55,398 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:09:55,428 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-03 02:09:55,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:09:55,619 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:09:55,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:09:55,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1362254855, now seen corresponding path program 1 times [2022-11-03 02:09:55,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:09:55,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2052571900] [2022-11-03 02:09:55,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:09:55,621 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:09:55,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:09:55,622 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:09:55,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-03 02:09:56,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:09:56,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 2685 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:09:56,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:09:57,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:09:57,305 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:09:57,305 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:09:57,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2052571900] [2022-11-03 02:09:57,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2052571900] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:09:57,306 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:09:57,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:09:57,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067729795] [2022-11-03 02:09:57,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:09:57,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:09:57,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:09:57,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:09:57,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:09:57,309 INFO L87 Difference]: Start difference. First operand 9541 states and 14030 transitions. Second operand has 7 states, 7 states have (on average 56.0) internal successors, (392), 7 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:57,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:09:57,884 INFO L93 Difference]: Finished difference Result 13936 states and 20425 transitions. [2022-11-03 02:09:57,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:09:57,884 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 56.0) internal successors, (392), 7 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 392 [2022-11-03 02:09:57,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:09:57,906 INFO L225 Difference]: With dead ends: 13936 [2022-11-03 02:09:57,906 INFO L226 Difference]: Without dead ends: 13547 [2022-11-03 02:09:57,911 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 386 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:09:57,912 INFO L413 NwaCegarLoop]: 946 mSDtfsCounter, 1689 mSDsluCounter, 3409 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1689 SdHoareTripleChecker+Valid, 4355 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:09:57,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1689 Valid, 4355 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 33 Unchecked, 0.5s Time] [2022-11-03 02:09:57,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13547 states. [2022-11-03 02:09:58,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13547 to 13021. [2022-11-03 02:09:58,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13021 states, 13020 states have (on average 1.463748079877112) internal successors, (19058), 13020 states have internal predecessors, (19058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:58,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13021 states to 13021 states and 19058 transitions. [2022-11-03 02:09:58,157 INFO L78 Accepts]: Start accepts. Automaton has 13021 states and 19058 transitions. Word has length 392 [2022-11-03 02:09:58,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:09:58,158 INFO L495 AbstractCegarLoop]: Abstraction has 13021 states and 19058 transitions. [2022-11-03 02:09:58,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 56.0) internal successors, (392), 7 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:58,158 INFO L276 IsEmpty]: Start isEmpty. Operand 13021 states and 19058 transitions. [2022-11-03 02:09:58,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2022-11-03 02:09:58,190 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:09:58,191 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:09:58,221 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-03 02:09:58,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:09:58,411 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:09:58,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:09:58,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1206274313, now seen corresponding path program 1 times [2022-11-03 02:09:58,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:09:58,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1811963554] [2022-11-03 02:09:58,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:09:58,414 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:09:58,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:09:58,415 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:09:58,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-03 02:09:59,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:09:59,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 2685 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:09:59,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:10:00,527 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:10:00,527 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:10:00,527 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:10:00,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1811963554] [2022-11-03 02:10:00,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1811963554] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:10:00,527 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:10:00,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:10:00,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320162126] [2022-11-03 02:10:00,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:10:00,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:10:00,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:10:00,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:10:00,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:10:00,529 INFO L87 Difference]: Start difference. First operand 13021 states and 19058 transitions. Second operand has 7 states, 7 states have (on average 56.0) internal successors, (392), 7 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:00,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:10:00,771 INFO L93 Difference]: Finished difference Result 20908 states and 30503 transitions. [2022-11-03 02:10:00,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:10:00,773 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 56.0) internal successors, (392), 7 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 392 [2022-11-03 02:10:00,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:10:00,804 INFO L225 Difference]: With dead ends: 20908 [2022-11-03 02:10:00,804 INFO L226 Difference]: Without dead ends: 20519 [2022-11-03 02:10:00,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 386 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:10:00,810 INFO L413 NwaCegarLoop]: 576 mSDtfsCounter, 541 mSDsluCounter, 2310 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 541 SdHoareTripleChecker+Valid, 2886 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:10:00,811 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [541 Valid, 2886 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 15 Unchecked, 0.2s Time] [2022-11-03 02:10:00,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20519 states. [2022-11-03 02:10:01,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20519 to 20519. [2022-11-03 02:10:01,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20519 states, 20518 states have (on average 1.4582805341651233) internal successors, (29921), 20518 states have internal predecessors, (29921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:01,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20519 states to 20519 states and 29921 transitions. [2022-11-03 02:10:01,051 INFO L78 Accepts]: Start accepts. Automaton has 20519 states and 29921 transitions. Word has length 392 [2022-11-03 02:10:01,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:10:01,051 INFO L495 AbstractCegarLoop]: Abstraction has 20519 states and 29921 transitions. [2022-11-03 02:10:01,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 56.0) internal successors, (392), 7 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:01,052 INFO L276 IsEmpty]: Start isEmpty. Operand 20519 states and 29921 transitions. [2022-11-03 02:10:01,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2022-11-03 02:10:01,100 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:10:01,101 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:10:01,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-03 02:10:01,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:10:01,327 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:10:01,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:10:01,328 INFO L85 PathProgramCache]: Analyzing trace with hash -722657913, now seen corresponding path program 1 times [2022-11-03 02:10:01,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:10:01,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1603371962] [2022-11-03 02:10:01,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:10:01,331 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:10:01,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:10:01,332 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:10:01,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-03 02:10:02,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:10:02,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 2685 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:10:02,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:10:04,082 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:10:04,082 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:10:04,083 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:10:04,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1603371962] [2022-11-03 02:10:04,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1603371962] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:10:04,083 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:10:04,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:10:04,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539266007] [2022-11-03 02:10:04,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:10:04,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:10:04,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:10:04,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:10:04,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:10:04,086 INFO L87 Difference]: Start difference. First operand 20519 states and 29921 transitions. Second operand has 7 states, 7 states have (on average 56.0) internal successors, (392), 7 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:04,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:10:04,419 INFO L93 Difference]: Finished difference Result 41134 states and 59988 transitions. [2022-11-03 02:10:04,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:10:04,424 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 56.0) internal successors, (392), 7 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 392 [2022-11-03 02:10:04,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:10:04,471 INFO L225 Difference]: With dead ends: 41134 [2022-11-03 02:10:04,472 INFO L226 Difference]: Without dead ends: 40745 [2022-11-03 02:10:04,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 386 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:10:04,483 INFO L413 NwaCegarLoop]: 575 mSDtfsCounter, 438 mSDsluCounter, 2865 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 3440 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:10:04,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [438 Valid, 3440 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 19 Unchecked, 0.2s Time] [2022-11-03 02:10:04,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40745 states. [2022-11-03 02:10:04,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40745 to 40745. [2022-11-03 02:10:04,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40745 states, 40744 states have (on average 1.4580306302768506) internal successors, (59406), 40744 states have internal predecessors, (59406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:05,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40745 states to 40745 states and 59406 transitions. [2022-11-03 02:10:05,049 INFO L78 Accepts]: Start accepts. Automaton has 40745 states and 59406 transitions. Word has length 392 [2022-11-03 02:10:05,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:10:05,050 INFO L495 AbstractCegarLoop]: Abstraction has 40745 states and 59406 transitions. [2022-11-03 02:10:05,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 56.0) internal successors, (392), 7 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:05,050 INFO L276 IsEmpty]: Start isEmpty. Operand 40745 states and 59406 transitions. [2022-11-03 02:10:05,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2022-11-03 02:10:05,100 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:10:05,100 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:10:05,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-03 02:10:05,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:10:05,323 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:10:05,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:10:05,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1971238277, now seen corresponding path program 1 times [2022-11-03 02:10:05,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:10:05,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2057521921] [2022-11-03 02:10:05,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:10:05,327 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:10:05,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:10:05,328 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:10:05,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-03 02:10:06,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:10:06,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 2685 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:10:06,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:10:08,320 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:10:08,321 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:10:08,321 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:10:08,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2057521921] [2022-11-03 02:10:08,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2057521921] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:10:08,322 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:10:08,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:10:08,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354354875] [2022-11-03 02:10:08,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:10:08,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:10:08,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:10:08,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:10:08,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:10:08,324 INFO L87 Difference]: Start difference. First operand 40745 states and 59406 transitions. Second operand has 7 states, 7 states have (on average 56.0) internal successors, (392), 7 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:08,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:10:08,835 INFO L93 Difference]: Finished difference Result 81448 states and 118755 transitions. [2022-11-03 02:10:08,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:10:08,836 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 56.0) internal successors, (392), 7 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 392 [2022-11-03 02:10:08,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:10:08,896 INFO L225 Difference]: With dead ends: 81448 [2022-11-03 02:10:08,896 INFO L226 Difference]: Without dead ends: 81059 [2022-11-03 02:10:08,907 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 386 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:10:08,907 INFO L413 NwaCegarLoop]: 575 mSDtfsCounter, 604 mSDsluCounter, 2218 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 604 SdHoareTripleChecker+Valid, 2793 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:10:08,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [604 Valid, 2793 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 15 Unchecked, 0.2s Time] [2022-11-03 02:10:08,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81059 states. [2022-11-03 02:10:09,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81059 to 81059. [2022-11-03 02:10:09,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81059 states, 81058 states have (on average 1.4578820104122974) internal successors, (118173), 81058 states have internal predecessors, (118173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:09,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81059 states to 81059 states and 118173 transitions. [2022-11-03 02:10:09,844 INFO L78 Accepts]: Start accepts. Automaton has 81059 states and 118173 transitions. Word has length 392 [2022-11-03 02:10:09,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:10:09,844 INFO L495 AbstractCegarLoop]: Abstraction has 81059 states and 118173 transitions. [2022-11-03 02:10:09,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 56.0) internal successors, (392), 7 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:09,845 INFO L276 IsEmpty]: Start isEmpty. Operand 81059 states and 118173 transitions. [2022-11-03 02:10:09,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2022-11-03 02:10:09,952 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:10:09,952 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:10:09,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-03 02:10:10,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:10:10,171 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:10:10,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:10:10,171 INFO L85 PathProgramCache]: Analyzing trace with hash 646382083, now seen corresponding path program 1 times [2022-11-03 02:10:10,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:10:10,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [42396774] [2022-11-03 02:10:10,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:10:10,174 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:10:10,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:10:10,175 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:10:10,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-03 02:10:11,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:10:11,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 2685 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:10:11,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:10:12,207 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:10:12,207 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:10:12,208 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:10:12,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [42396774] [2022-11-03 02:10:12,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [42396774] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:10:12,208 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:10:12,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:10:12,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939040263] [2022-11-03 02:10:12,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:10:12,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:10:12,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:10:12,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:10:12,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:10:12,211 INFO L87 Difference]: Start difference. First operand 81059 states and 118173 transitions. Second operand has 7 states, 7 states have (on average 56.0) internal successors, (392), 7 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:12,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:10:12,752 INFO L93 Difference]: Finished difference Result 82224 states and 119907 transitions. [2022-11-03 02:10:12,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:10:12,753 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 56.0) internal successors, (392), 7 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 392 [2022-11-03 02:10:12,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:10:12,845 INFO L225 Difference]: With dead ends: 82224 [2022-11-03 02:10:12,845 INFO L226 Difference]: Without dead ends: 81835 [2022-11-03 02:10:12,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 386 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:10:12,871 INFO L413 NwaCegarLoop]: 1042 mSDtfsCounter, 1527 mSDsluCounter, 3130 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1527 SdHoareTripleChecker+Valid, 4172 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:10:12,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1527 Valid, 4172 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 21 Unchecked, 0.3s Time] [2022-11-03 02:10:12,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81835 states. [2022-11-03 02:10:13,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81835 to 81373. [2022-11-03 02:10:13,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81373 states, 81372 states have (on average 1.4579462222877648) internal successors, (118636), 81372 states have internal predecessors, (118636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:14,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81373 states to 81373 states and 118636 transitions. [2022-11-03 02:10:14,154 INFO L78 Accepts]: Start accepts. Automaton has 81373 states and 118636 transitions. Word has length 392 [2022-11-03 02:10:14,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:10:14,154 INFO L495 AbstractCegarLoop]: Abstraction has 81373 states and 118636 transitions. [2022-11-03 02:10:14,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 56.0) internal successors, (392), 7 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:14,155 INFO L276 IsEmpty]: Start isEmpty. Operand 81373 states and 118636 transitions. [2022-11-03 02:10:14,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2022-11-03 02:10:14,572 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:10:14,573 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:10:14,595 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-03 02:10:14,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:10:14,779 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:10:14,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:10:14,780 INFO L85 PathProgramCache]: Analyzing trace with hash 673447685, now seen corresponding path program 1 times [2022-11-03 02:10:14,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:10:14,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1912802805] [2022-11-03 02:10:14,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:10:14,783 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:10:14,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:10:14,784 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:10:14,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-03 02:10:15,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:10:15,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 2685 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:10:16,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:10:16,625 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:10:16,625 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:10:16,625 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:10:16,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1912802805] [2022-11-03 02:10:16,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1912802805] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:10:16,626 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:10:16,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:10:16,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505569830] [2022-11-03 02:10:16,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:10:16,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:10:16,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:10:16,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:10:16,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:10:16,628 INFO L87 Difference]: Start difference. First operand 81373 states and 118636 transitions. Second operand has 7 states, 7 states have (on average 56.0) internal successors, (392), 7 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:17,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:10:17,247 INFO L93 Difference]: Finished difference Result 84516 states and 123273 transitions. [2022-11-03 02:10:17,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:10:17,248 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 56.0) internal successors, (392), 7 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 392 [2022-11-03 02:10:17,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:10:17,311 INFO L225 Difference]: With dead ends: 84516 [2022-11-03 02:10:17,312 INFO L226 Difference]: Without dead ends: 84127 [2022-11-03 02:10:17,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 386 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:10:17,327 INFO L413 NwaCegarLoop]: 1045 mSDtfsCounter, 1261 mSDsluCounter, 4469 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1261 SdHoareTripleChecker+Valid, 5514 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:10:17,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1261 Valid, 5514 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 20 Unchecked, 0.3s Time] [2022-11-03 02:10:17,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84127 states. [2022-11-03 02:10:18,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84127 to 83667. [2022-11-03 02:10:18,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83667 states, 83666 states have (on average 1.458238711065427) internal successors, (122005), 83666 states have internal predecessors, (122005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:18,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83667 states to 83667 states and 122005 transitions. [2022-11-03 02:10:18,485 INFO L78 Accepts]: Start accepts. Automaton has 83667 states and 122005 transitions. Word has length 392 [2022-11-03 02:10:18,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:10:18,486 INFO L495 AbstractCegarLoop]: Abstraction has 83667 states and 122005 transitions. [2022-11-03 02:10:18,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 56.0) internal successors, (392), 7 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:18,486 INFO L276 IsEmpty]: Start isEmpty. Operand 83667 states and 122005 transitions. [2022-11-03 02:10:18,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2022-11-03 02:10:18,560 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:10:18,561 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:10:18,584 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-03 02:10:18,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:10:18,775 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:10:18,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:10:18,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1887415161, now seen corresponding path program 1 times [2022-11-03 02:10:18,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:10:18,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [587403396] [2022-11-03 02:10:18,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:10:18,778 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:10:18,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:10:18,778 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:10:18,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-03 02:10:19,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:10:19,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 2685 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:10:19,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:10:21,567 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:10:21,567 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:10:21,567 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:10:21,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [587403396] [2022-11-03 02:10:21,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [587403396] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:10:21,568 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:10:21,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:10:21,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317438748] [2022-11-03 02:10:21,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:10:21,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:10:21,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:10:21,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:10:21,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:10:21,570 INFO L87 Difference]: Start difference. First operand 83667 states and 122005 transitions. Second operand has 7 states, 7 states have (on average 56.0) internal successors, (392), 7 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:22,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:10:22,271 INFO L93 Difference]: Finished difference Result 166222 states and 242428 transitions. [2022-11-03 02:10:22,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:10:22,273 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 56.0) internal successors, (392), 7 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 392 [2022-11-03 02:10:22,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:10:22,388 INFO L225 Difference]: With dead ends: 166222 [2022-11-03 02:10:22,389 INFO L226 Difference]: Without dead ends: 165833 [2022-11-03 02:10:22,413 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 386 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:10:22,414 INFO L413 NwaCegarLoop]: 575 mSDtfsCounter, 487 mSDsluCounter, 2770 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 487 SdHoareTripleChecker+Valid, 3345 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:10:22,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [487 Valid, 3345 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 15 Unchecked, 0.2s Time] [2022-11-03 02:10:22,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165833 states. [2022-11-03 02:10:24,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165833 to 165833. [2022-11-03 02:10:24,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165833 states, 165832 states have (on average 1.458379564860823) internal successors, (241846), 165832 states have internal predecessors, (241846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:24,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165833 states to 165833 states and 241846 transitions. [2022-11-03 02:10:24,450 INFO L78 Accepts]: Start accepts. Automaton has 165833 states and 241846 transitions. Word has length 392 [2022-11-03 02:10:24,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:10:24,450 INFO L495 AbstractCegarLoop]: Abstraction has 165833 states and 241846 transitions. [2022-11-03 02:10:24,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 56.0) internal successors, (392), 7 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:24,451 INFO L276 IsEmpty]: Start isEmpty. Operand 165833 states and 241846 transitions. [2022-11-03 02:10:25,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2022-11-03 02:10:25,088 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:10:25,089 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:10:25,115 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-03 02:10:25,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:10:25,303 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:10:25,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:10:25,304 INFO L85 PathProgramCache]: Analyzing trace with hash -201235323, now seen corresponding path program 1 times [2022-11-03 02:10:25,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:10:25,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [627385352] [2022-11-03 02:10:25,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:10:25,307 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:10:25,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:10:25,311 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:10:25,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-03 02:10:26,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:10:26,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 2685 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:10:26,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:10:28,107 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:10:28,107 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:10:28,108 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:10:28,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [627385352] [2022-11-03 02:10:28,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [627385352] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:10:28,108 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:10:28,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:10:28,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310712747] [2022-11-03 02:10:28,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:10:28,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:10:28,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:10:28,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:10:28,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:10:28,111 INFO L87 Difference]: Start difference. First operand 165833 states and 241846 transitions. Second operand has 7 states, 7 states have (on average 56.0) internal successors, (392), 7 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:29,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:10:29,076 INFO L93 Difference]: Finished difference Result 331832 states and 483943 transitions. [2022-11-03 02:10:29,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:10:29,077 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 56.0) internal successors, (392), 7 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 392 [2022-11-03 02:10:29,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:10:29,736 INFO L225 Difference]: With dead ends: 331832 [2022-11-03 02:10:29,736 INFO L226 Difference]: Without dead ends: 331443 [2022-11-03 02:10:29,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 386 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:10:29,775 INFO L413 NwaCegarLoop]: 575 mSDtfsCounter, 504 mSDsluCounter, 2792 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 504 SdHoareTripleChecker+Valid, 3367 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:10:29,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [504 Valid, 3367 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 17 Unchecked, 0.2s Time] [2022-11-03 02:10:29,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331443 states. [2022-11-03 02:10:32,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331443 to 331443. [2022-11-03 02:10:32,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331443 states, 331442 states have (on average 1.4583577217129995) internal successors, (483361), 331442 states have internal predecessors, (483361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:34,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331443 states to 331443 states and 483361 transitions. [2022-11-03 02:10:34,245 INFO L78 Accepts]: Start accepts. Automaton has 331443 states and 483361 transitions. Word has length 392 [2022-11-03 02:10:34,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:10:34,245 INFO L495 AbstractCegarLoop]: Abstraction has 331443 states and 483361 transitions. [2022-11-03 02:10:34,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 56.0) internal successors, (392), 7 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:34,246 INFO L276 IsEmpty]: Start isEmpty. Operand 331443 states and 483361 transitions. [2022-11-03 02:10:34,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2022-11-03 02:10:34,584 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:10:34,584 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:10:34,608 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-03 02:10:34,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:10:34,785 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:10:34,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:10:34,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1827350787, now seen corresponding path program 1 times [2022-11-03 02:10:34,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:10:34,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [983905467] [2022-11-03 02:10:34,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:10:34,788 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:10:34,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:10:34,789 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:10:34,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b168ffc2-c385-473a-b8d9-b17a8ce4d3d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-03 02:10:36,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:10:36,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 2685 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:10:36,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:10:38,036 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:10:38,036 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:10:38,036 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:10:38,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [983905467] [2022-11-03 02:10:38,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [983905467] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:10:38,037 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:10:38,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:10:38,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227880740] [2022-11-03 02:10:38,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:10:38,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:10:38,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:10:38,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:10:38,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:10:38,039 INFO L87 Difference]: Start difference. First operand 331443 states and 483361 transitions. Second operand has 7 states, 7 states have (on average 56.0) internal successors, (392), 7 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:39,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:10:39,908 INFO L93 Difference]: Finished difference Result 662846 states and 966672 transitions. [2022-11-03 02:10:39,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:10:39,910 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 56.0) internal successors, (392), 7 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 392 [2022-11-03 02:10:39,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:10:41,280 INFO L225 Difference]: With dead ends: 662846 [2022-11-03 02:10:41,280 INFO L226 Difference]: Without dead ends: 662457 [2022-11-03 02:10:41,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 386 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:10:41,379 INFO L413 NwaCegarLoop]: 575 mSDtfsCounter, 540 mSDsluCounter, 2865 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 540 SdHoareTripleChecker+Valid, 3440 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:10:41,379 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [540 Valid, 3440 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 19 Unchecked, 0.2s Time] [2022-11-03 02:10:41,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662457 states.