./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_vsa16a_p1.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_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/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_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_vsa16a_p1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/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_6f42e1d3-a9ff-4931-9026-24fbc54c1252/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 cd89032489cba73cfad07d869c8cd52bb6dfeb92075f997edf46a57f8d65328b --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 01:48:24,342 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 01:48:24,344 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 01:48:24,371 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 01:48:24,372 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 01:48:24,373 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 01:48:24,374 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 01:48:24,376 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 01:48:24,377 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 01:48:24,378 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 01:48:24,379 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 01:48:24,380 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 01:48:24,381 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 01:48:24,382 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 01:48:24,383 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 01:48:24,384 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 01:48:24,385 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 01:48:24,386 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 01:48:24,388 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 01:48:24,390 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 01:48:24,391 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 01:48:24,393 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 01:48:24,394 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 01:48:24,395 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 01:48:24,398 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 01:48:24,399 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 01:48:24,399 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 01:48:24,400 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 01:48:24,401 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 01:48:24,402 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 01:48:24,402 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 01:48:24,403 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 01:48:24,404 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 01:48:24,405 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 01:48:24,406 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 01:48:24,406 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 01:48:24,407 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 01:48:24,408 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 01:48:24,408 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 01:48:24,409 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 01:48:24,410 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 01:48:24,411 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 01:48:24,433 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 01:48:24,434 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 01:48:24,434 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 01:48:24,434 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 01:48:24,435 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 01:48:24,435 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 01:48:24,436 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 01:48:24,436 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 01:48:24,436 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 01:48:24,437 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 01:48:24,437 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 01:48:24,437 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 01:48:24,437 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 01:48:24,437 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 01:48:24,438 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 01:48:24,438 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 01:48:24,438 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 01:48:24,438 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 01:48:24,439 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 01:48:24,439 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 01:48:24,439 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 01:48:24,440 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 01:48:24,440 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 01:48:24,440 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 01:48:24,440 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 01:48:24,440 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 01:48:24,441 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 01:48:24,441 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 01:48:24,441 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 01:48:24,441 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:48:24,441 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 01:48:24,442 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 01:48:24,442 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 01:48:24,442 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 01:48:24,442 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 01:48:24,442 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 01:48:24,442 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 01:48:24,443 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 01:48:24,443 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_6f42e1d3-a9ff-4931-9026-24fbc54c1252/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cd89032489cba73cfad07d869c8cd52bb6dfeb92075f997edf46a57f8d65328b [2022-11-03 01:48:24,724 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 01:48:24,745 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 01:48:24,747 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 01:48:24,749 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 01:48:24,750 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 01:48:24,751 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_vsa16a_p1.c [2022-11-03 01:48:24,842 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/data/c49f19a37/ee8935291a9c471b8ef9925e1012dd9d/FLAG9af7d0f12 [2022-11-03 01:48:25,462 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 01:48:25,463 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_vsa16a_p1.c [2022-11-03 01:48:25,479 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/data/c49f19a37/ee8935291a9c471b8ef9925e1012dd9d/FLAG9af7d0f12 [2022-11-03 01:48:25,693 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/data/c49f19a37/ee8935291a9c471b8ef9925e1012dd9d [2022-11-03 01:48:25,695 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 01:48:25,697 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 01:48:25,698 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 01:48:25,699 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 01:48:25,702 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 01:48:25,703 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:48:25" (1/1) ... [2022-11-03 01:48:25,704 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@383a5896 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:48:25, skipping insertion in model container [2022-11-03 01:48:25,705 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:48:25" (1/1) ... [2022-11-03 01:48:25,712 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 01:48:25,784 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 01:48:25,998 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_6f42e1d3-a9ff-4931-9026-24fbc54c1252/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_vsa16a_p1.c[1107,1120] [2022-11-03 01:48:26,430 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:48:26,434 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 01:48:26,445 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_6f42e1d3-a9ff-4931-9026-24fbc54c1252/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_vsa16a_p1.c[1107,1120] [2022-11-03 01:48:26,651 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:48:26,664 INFO L208 MainTranslator]: Completed translation [2022-11-03 01:48:26,665 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:48:26 WrapperNode [2022-11-03 01:48:26,665 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 01:48:26,666 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 01:48:26,666 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 01:48:26,666 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 01:48:26,675 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:48:26" (1/1) ... [2022-11-03 01:48:26,740 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:48:26" (1/1) ... [2022-11-03 01:48:26,932 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 2290 [2022-11-03 01:48:26,933 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 01:48:26,934 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 01:48:26,934 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 01:48:26,934 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 01:48:26,943 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:48:26" (1/1) ... [2022-11-03 01:48:26,944 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:48:26" (1/1) ... [2022-11-03 01:48:26,964 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:48:26" (1/1) ... [2022-11-03 01:48:26,965 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:48:26" (1/1) ... [2022-11-03 01:48:27,049 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:48:26" (1/1) ... [2022-11-03 01:48:27,071 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:48:26" (1/1) ... [2022-11-03 01:48:27,097 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:48:26" (1/1) ... [2022-11-03 01:48:27,112 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:48:26" (1/1) ... [2022-11-03 01:48:27,153 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 01:48:27,155 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 01:48:27,155 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 01:48:27,155 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 01:48:27,156 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:48:26" (1/1) ... [2022-11-03 01:48:27,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:48:27,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:48:27,190 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 01:48:27,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 01:48:27,255 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 01:48:27,255 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 01:48:27,815 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 01:48:27,817 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 01:48:34,659 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 01:48:46,073 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 01:48:46,073 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 01:48:46,076 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:48:46 BoogieIcfgContainer [2022-11-03 01:48:46,076 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 01:48:46,079 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 01:48:46,079 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 01:48:46,083 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 01:48:46,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 01:48:25" (1/3) ... [2022-11-03 01:48:46,084 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72ecd69b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:48:46, skipping insertion in model container [2022-11-03 01:48:46,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:48:26" (2/3) ... [2022-11-03 01:48:46,085 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72ecd69b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:48:46, skipping insertion in model container [2022-11-03 01:48:46,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:48:46" (3/3) ... [2022-11-03 01:48:46,087 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.vis_arrays_vsa16a_p1.c [2022-11-03 01:48:46,107 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 01:48:46,107 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 01:48:46,156 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 01:48:46,164 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;@5d59e189, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 01:48:46,164 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 01:48:46,168 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 01:48:46,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-03 01:48:46,175 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:48:46,176 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-03 01:48:46,176 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:48:46,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:48:46,182 INFO L85 PathProgramCache]: Analyzing trace with hash 28728552, now seen corresponding path program 1 times [2022-11-03 01:48:46,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:48:46,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769613808] [2022-11-03 01:48:46,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:48:46,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:48:46,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 01:48:46,496 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-03 01:48:46,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 01:48:46,693 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-03 01:48:46,695 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-03 01:48:46,696 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-03 01:48:46,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 01:48:46,703 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-03 01:48:46,708 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-03 01:48:46,731 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2022-11-03 01:48:46,741 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 01:48:46 BoogieIcfgContainer [2022-11-03 01:48:46,742 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-03 01:48:46,745 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-03 01:48:46,745 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-03 01:48:46,745 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-03 01:48:46,746 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:48:46" (3/4) ... [2022-11-03 01:48:46,750 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-03 01:48:46,750 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-03 01:48:46,752 INFO L158 Benchmark]: Toolchain (without parser) took 21054.43ms. Allocated memory was 96.5MB in the beginning and 3.0GB in the end (delta: 3.0GB). Free memory was 55.8MB in the beginning and 2.7GB in the end (delta: -2.7GB). Peak memory consumption was 297.4MB. Max. memory is 16.1GB. [2022-11-03 01:48:46,753 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 96.5MB. Free memory was 75.4MB in the beginning and 75.3MB in the end (delta: 84.0kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 01:48:46,755 INFO L158 Benchmark]: CACSL2BoogieTranslator took 966.78ms. Allocated memory was 96.5MB in the beginning and 148.9MB in the end (delta: 52.4MB). Free memory was 55.5MB in the beginning and 99.5MB in the end (delta: -44.0MB). Peak memory consumption was 21.6MB. Max. memory is 16.1GB. [2022-11-03 01:48:46,756 INFO L158 Benchmark]: Boogie Procedure Inliner took 266.98ms. Allocated memory is still 148.9MB. Free memory was 99.5MB in the beginning and 90.3MB in the end (delta: 9.2MB). Peak memory consumption was 39.3MB. Max. memory is 16.1GB. [2022-11-03 01:48:46,761 INFO L158 Benchmark]: Boogie Preprocessor took 220.12ms. Allocated memory is still 148.9MB. Free memory was 90.3MB in the beginning and 72.7MB in the end (delta: 17.6MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2022-11-03 01:48:46,762 INFO L158 Benchmark]: RCFGBuilder took 18921.89ms. Allocated memory was 148.9MB in the beginning and 3.0GB in the end (delta: 2.9GB). Free memory was 72.7MB in the beginning and 2.8GB in the end (delta: -2.7GB). Peak memory consumption was 758.7MB. Max. memory is 16.1GB. [2022-11-03 01:48:46,763 INFO L158 Benchmark]: TraceAbstraction took 662.70ms. Allocated memory is still 3.0GB. Free memory was 2.8GB in the beginning and 2.7GB in the end (delta: 47.2MB). Peak memory consumption was 48.2MB. Max. memory is 16.1GB. [2022-11-03 01:48:46,764 INFO L158 Benchmark]: Witness Printer took 5.55ms. Allocated memory is still 3.0GB. Free memory was 2.7GB in the beginning and 2.7GB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 01:48:46,770 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 96.5MB. Free memory was 75.4MB in the beginning and 75.3MB in the end (delta: 84.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 966.78ms. Allocated memory was 96.5MB in the beginning and 148.9MB in the end (delta: 52.4MB). Free memory was 55.5MB in the beginning and 99.5MB in the end (delta: -44.0MB). Peak memory consumption was 21.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 266.98ms. Allocated memory is still 148.9MB. Free memory was 99.5MB in the beginning and 90.3MB in the end (delta: 9.2MB). Peak memory consumption was 39.3MB. Max. memory is 16.1GB. * Boogie Preprocessor took 220.12ms. Allocated memory is still 148.9MB. Free memory was 90.3MB in the beginning and 72.7MB in the end (delta: 17.6MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * RCFGBuilder took 18921.89ms. Allocated memory was 148.9MB in the beginning and 3.0GB in the end (delta: 2.9GB). Free memory was 72.7MB in the beginning and 2.8GB in the end (delta: -2.7GB). Peak memory consumption was 758.7MB. Max. memory is 16.1GB. * TraceAbstraction took 662.70ms. Allocated memory is still 3.0GB. Free memory was 2.8GB in the beginning and 2.7GB in the end (delta: 47.2MB). Peak memory consumption was 48.2MB. Max. memory is 16.1GB. * Witness Printer took 5.55ms. Allocated memory is still 3.0GB. Free memory was 2.7GB in the beginning and 2.7GB in the end (delta: 1.0MB). 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 183, overapproximation of bitwiseAnd at line 190. 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_3 mask_SORT_3 = (SORT_3)-1 >> (sizeof(SORT_3) * 8 - 16); [L29] const SORT_3 msb_SORT_3 = (SORT_3)1 << (16 - 1); [L31] const SORT_6 mask_SORT_6 = (SORT_6)-1 >> (sizeof(SORT_6) * 8 - 12); [L32] const SORT_6 msb_SORT_6 = (SORT_6)1 << (12 - 1); [L34] const SORT_45 mask_SORT_45 = (SORT_45)-1 >> (sizeof(SORT_45) * 8 - 3); [L35] const SORT_45 msb_SORT_45 = (SORT_45)1 << (3 - 1); [L37] const SORT_87 mask_SORT_87 = (SORT_87)-1 >> (sizeof(SORT_87) * 8 - 17); [L38] const SORT_87 msb_SORT_87 = (SORT_87)1 << (17 - 1); [L40] const SORT_88 mask_SORT_88 = (SORT_88)-1 >> (sizeof(SORT_88) * 8 - 5); [L41] const SORT_88 msb_SORT_88 = (SORT_88)1 << (5 - 1); [L43] const SORT_91 mask_SORT_91 = (SORT_91)-1 >> (sizeof(SORT_91) * 8 - 9); [L44] const SORT_91 msb_SORT_91 = (SORT_91)1 << (9 - 1); [L46] const SORT_93 mask_SORT_93 = (SORT_93)-1 >> (sizeof(SORT_93) * 8 - 10); [L47] const SORT_93 msb_SORT_93 = (SORT_93)1 << (10 - 1); [L49] const SORT_96 mask_SORT_96 = (SORT_96)-1 >> (sizeof(SORT_96) * 8 - 11); [L50] const SORT_96 msb_SORT_96 = (SORT_96)1 << (11 - 1); [L52] const SORT_101 mask_SORT_101 = (SORT_101)-1 >> (sizeof(SORT_101) * 8 - 13); [L53] const SORT_101 msb_SORT_101 = (SORT_101)1 << (13 - 1); [L55] const SORT_104 mask_SORT_104 = (SORT_104)-1 >> (sizeof(SORT_104) * 8 - 14); [L56] const SORT_104 msb_SORT_104 = (SORT_104)1 << (14 - 1); [L58] const SORT_107 mask_SORT_107 = (SORT_107)-1 >> (sizeof(SORT_107) * 8 - 15); [L59] const SORT_107 msb_SORT_107 = (SORT_107)1 << (15 - 1); [L61] const SORT_140 mask_SORT_140 = (SORT_140)-1 >> (sizeof(SORT_140) * 8 - 7); [L62] const SORT_140 msb_SORT_140 = (SORT_140)1 << (7 - 1); [L64] const SORT_200 mask_SORT_200 = (SORT_200)-1 >> (sizeof(SORT_200) * 8 - 2); [L65] const SORT_200 msb_SORT_200 = (SORT_200)1 << (2 - 1); [L67] const SORT_359 mask_SORT_359 = (SORT_359)-1 >> (sizeof(SORT_359) * 8 - 4); [L68] const SORT_359 msb_SORT_359 = (SORT_359)1 << (4 - 1); [L70] const SORT_362 mask_SORT_362 = (SORT_362)-1 >> (sizeof(SORT_362) * 8 - 6); [L71] const SORT_362 msb_SORT_362 = (SORT_362)1 << (6 - 1); [L73] const SORT_365 mask_SORT_365 = (SORT_365)-1 >> (sizeof(SORT_365) * 8 - 8); [L74] const SORT_365 msb_SORT_365 = (SORT_365)1 << (8 - 1); [L76] const SORT_6 var_7 = 0; [L77] const SORT_1 var_19 = 1; [L78] const SORT_3 var_23 = 0; [L79] const SORT_1 var_30 = 0; [L80] const SORT_45 var_46 = 0; [L81] const SORT_45 var_50 = 2; [L82] const SORT_45 var_54 = 1; [L83] const SORT_45 var_59 = 4; [L84] const SORT_45 var_61 = 5; [L85] const SORT_45 var_65 = 3; [L86] const SORT_6 var_74 = 2; [L87] const SORT_88 var_89 = 0; [L88] const SORT_140 var_142 = 5; [L89] const SORT_140 var_146 = 4; [L90] const SORT_140 var_150 = 3; [L91] const SORT_140 var_154 = 2; [L92] const SORT_140 var_158 = 1; [L93] const SORT_140 var_162 = 0; [L94] const SORT_200 var_202 = 0; [L95] const SORT_3 var_209 = 65535; [L97] SORT_1 input_2; [L98] SORT_3 input_4; [L99] SORT_3 input_5; [L100] SORT_3 input_197; [L101] SORT_3 input_198; [L102] SORT_3 input_199; [L103] SORT_3 input_208; [L104] SORT_3 input_217; [L105] SORT_3 input_218; [L106] SORT_3 input_219; [L107] SORT_3 input_222; [L108] SORT_3 input_240; [L109] SORT_3 input_241; [L110] SORT_3 input_242; [L111] SORT_3 input_245; [L112] SORT_3 input_247; [L113] SORT_200 input_261; [L114] SORT_200 input_262; [L115] SORT_200 input_263; [L117] SORT_6 state_8 = __VERIFIER_nondet_ushort() & mask_SORT_6; [L118] SORT_6 state_12 = __VERIFIER_nondet_ushort() & mask_SORT_6; [L119] SORT_3 state_24 = __VERIFIER_nondet_ushort() & mask_SORT_3; [L120] SORT_3 state_26 = __VERIFIER_nondet_ushort() & mask_SORT_3; [L121] SORT_3 state_28 = __VERIFIER_nondet_ushort() & mask_SORT_3; [L122] SORT_1 state_31 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L123] SORT_3 state_33 = __VERIFIER_nondet_ushort() & mask_SORT_3; [L124] SORT_3 state_35 = __VERIFIER_nondet_ushort() & mask_SORT_3; [L125] SORT_3 state_37 = __VERIFIER_nondet_ushort() & mask_SORT_3; [L126] SORT_3 state_39 = __VERIFIER_nondet_ushort() & mask_SORT_3; [L127] SORT_3 state_41 = __VERIFIER_nondet_ushort() & mask_SORT_3; [L128] SORT_3 state_43 = __VERIFIER_nondet_ushort() & mask_SORT_3; [L129] SORT_45 state_47 = __VERIFIER_nondet_uchar() & mask_SORT_45; [L131] SORT_6 init_9_arg_1 = var_7; [L132] state_8 = init_9_arg_1 [L133] SORT_6 init_13_arg_1 = var_7; [L134] state_12 = init_13_arg_1 [L135] SORT_3 init_25_arg_1 = var_23; [L136] state_24 = init_25_arg_1 [L137] SORT_3 init_27_arg_1 = var_23; [L138] state_26 = init_27_arg_1 [L139] SORT_3 init_29_arg_1 = var_23; [L140] state_28 = init_29_arg_1 [L141] SORT_1 init_32_arg_1 = var_30; [L142] state_31 = init_32_arg_1 [L143] SORT_3 init_34_arg_1 = var_23; [L144] state_33 = init_34_arg_1 [L145] SORT_3 init_36_arg_1 = var_23; [L146] state_35 = init_36_arg_1 [L147] SORT_3 init_38_arg_1 = var_23; [L148] state_37 = init_38_arg_1 [L149] SORT_3 init_40_arg_1 = var_23; [L150] state_39 = init_40_arg_1 [L151] SORT_3 init_42_arg_1 = var_23; [L152] state_41 = init_42_arg_1 [L153] SORT_3 init_44_arg_1 = var_23; [L154] state_43 = init_44_arg_1 [L155] SORT_45 init_48_arg_1 = var_46; [L156] state_47 = init_48_arg_1 VAL [init_13_arg_1=0, init_25_arg_1=0, init_27_arg_1=0, init_29_arg_1=0, init_32_arg_1=0, init_34_arg_1=0, init_36_arg_1=0, init_38_arg_1=0, init_40_arg_1=0, init_42_arg_1=0, init_44_arg_1=0, init_48_arg_1=0, init_9_arg_1=0, mask_SORT_1=1, mask_SORT_101=8191, mask_SORT_104=16383, mask_SORT_107=32767, mask_SORT_140=127, mask_SORT_200=3, mask_SORT_3=65535, mask_SORT_359=15, mask_SORT_362=63, mask_SORT_365=255, mask_SORT_45=7, mask_SORT_6=4095, mask_SORT_87=4294967295, mask_SORT_88=31, mask_SORT_91=511, mask_SORT_93=1023, mask_SORT_96=2047, msb_SORT_1=1, msb_SORT_101=4096, msb_SORT_104=8192, msb_SORT_107=16384, msb_SORT_140=64, msb_SORT_200=2, msb_SORT_3=32768, msb_SORT_359=8, msb_SORT_362=32, msb_SORT_365=128, msb_SORT_45=4, msb_SORT_6=2048, msb_SORT_87=65536, msb_SORT_88=16, msb_SORT_91=256, msb_SORT_93=512, msb_SORT_96=1024, state_12=0, state_24=0, state_26=0, state_28=0, state_31=0, state_33=0, state_35=0, state_37=0, state_39=0, state_41=0, state_43=0, state_47=0, state_8=0, var_142=5, var_146=4, var_150=3, var_154=2, var_158=1, var_162=0, var_19=1, var_202=0, var_209=65535, var_23=0, var_30=0, var_46=0, var_50=2, var_54=1, var_59=4, var_61=5, var_65=3, var_7=0, var_74=2, var_89=0] [L159] input_2 = __VERIFIER_nondet_uchar() [L160] input_4 = __VERIFIER_nondet_ushort() [L161] input_5 = __VERIFIER_nondet_ushort() [L162] input_197 = __VERIFIER_nondet_ushort() [L163] input_198 = __VERIFIER_nondet_ushort() [L164] input_199 = __VERIFIER_nondet_ushort() [L165] input_208 = __VERIFIER_nondet_ushort() [L166] input_217 = __VERIFIER_nondet_ushort() [L167] input_218 = __VERIFIER_nondet_ushort() [L168] input_219 = __VERIFIER_nondet_ushort() [L169] input_222 = __VERIFIER_nondet_ushort() [L170] input_240 = __VERIFIER_nondet_ushort() [L171] input_241 = __VERIFIER_nondet_ushort() [L172] input_242 = __VERIFIER_nondet_ushort() [L173] input_245 = __VERIFIER_nondet_ushort() [L174] input_247 = __VERIFIER_nondet_ushort() [L175] input_261 = __VERIFIER_nondet_uchar() [L176] input_262 = __VERIFIER_nondet_uchar() [L177] input_263 = __VERIFIER_nondet_uchar() [L180] SORT_6 var_10_arg_0 = state_8; [L181] SORT_1 var_10 = var_10_arg_0 >> 0; [L182] SORT_1 var_11_arg_0 = var_10; [L183] SORT_1 var_11 = ~var_11_arg_0; [L184] SORT_6 var_14_arg_0 = state_12; [L185] SORT_1 var_14 = var_14_arg_0 >> 0; [L186] SORT_1 var_15_arg_0 = var_14; [L187] SORT_1 var_15 = ~var_15_arg_0; [L188] SORT_1 var_16_arg_0 = var_11; [L189] SORT_1 var_16_arg_1 = var_15; [L190] SORT_1 var_16 = var_16_arg_0 & var_16_arg_1; [L191] SORT_1 var_20_arg_0 = var_16; [L192] SORT_1 var_20 = ~var_20_arg_0; [L193] SORT_1 var_21_arg_0 = var_19; [L194] SORT_1 var_21_arg_1 = var_20; [L195] SORT_1 var_21 = var_21_arg_0 & var_21_arg_1; [L196] var_21 = var_21 & mask_SORT_1 [L197] SORT_1 bad_22_arg_0 = var_21; [L198] CALL __VERIFIER_assert(!(bad_22_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: 0.6s, 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, 0.2s 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 01:48:46,819 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/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_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/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_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_vsa16a_p1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/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_6f42e1d3-a9ff-4931-9026-24fbc54c1252/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 cd89032489cba73cfad07d869c8cd52bb6dfeb92075f997edf46a57f8d65328b --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 01:48:49,275 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 01:48:49,279 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 01:48:49,308 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 01:48:49,309 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 01:48:49,310 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 01:48:49,311 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 01:48:49,313 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 01:48:49,315 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 01:48:49,316 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 01:48:49,317 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 01:48:49,318 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 01:48:49,319 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 01:48:49,320 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 01:48:49,321 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 01:48:49,322 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 01:48:49,323 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 01:48:49,324 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 01:48:49,326 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 01:48:49,328 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 01:48:49,329 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 01:48:49,331 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 01:48:49,332 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 01:48:49,333 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 01:48:49,336 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 01:48:49,337 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 01:48:49,337 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 01:48:49,338 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 01:48:49,339 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 01:48:49,340 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 01:48:49,340 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 01:48:49,341 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 01:48:49,342 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 01:48:49,343 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 01:48:49,344 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 01:48:49,344 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 01:48:49,345 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 01:48:49,345 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 01:48:49,345 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 01:48:49,346 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 01:48:49,347 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 01:48:49,348 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2022-11-03 01:48:49,372 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 01:48:49,372 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 01:48:49,372 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 01:48:49,373 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 01:48:49,373 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 01:48:49,374 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 01:48:49,374 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 01:48:49,374 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 01:48:49,374 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 01:48:49,375 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 01:48:49,375 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 01:48:49,375 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 01:48:49,376 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 01:48:49,376 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 01:48:49,376 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 01:48:49,376 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 01:48:49,377 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 01:48:49,377 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 01:48:49,377 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 01:48:49,377 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 01:48:49,377 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 01:48:49,378 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 01:48:49,378 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 01:48:49,378 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 01:48:49,378 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 01:48:49,378 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 01:48:49,379 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:48:49,379 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 01:48:49,379 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 01:48:49,379 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 01:48:49,379 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 01:48:49,379 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 01:48:49,380 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 01:48:49,380 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 01:48:49,380 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 01:48:49,380 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_6f42e1d3-a9ff-4931-9026-24fbc54c1252/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cd89032489cba73cfad07d869c8cd52bb6dfeb92075f997edf46a57f8d65328b [2022-11-03 01:48:49,748 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 01:48:49,773 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 01:48:49,775 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 01:48:49,777 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 01:48:49,778 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 01:48:49,783 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_vsa16a_p1.c [2022-11-03 01:48:49,852 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/data/da72338be/7e1b80a9ac92480aaeea24f2cf9e1c37/FLAG46a2d0530 [2022-11-03 01:48:50,564 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 01:48:50,564 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_vsa16a_p1.c [2022-11-03 01:48:50,590 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/data/da72338be/7e1b80a9ac92480aaeea24f2cf9e1c37/FLAG46a2d0530 [2022-11-03 01:48:50,789 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/data/da72338be/7e1b80a9ac92480aaeea24f2cf9e1c37 [2022-11-03 01:48:50,791 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 01:48:50,792 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 01:48:50,794 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 01:48:50,794 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 01:48:50,801 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 01:48:50,802 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:48:50" (1/1) ... [2022-11-03 01:48:50,803 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@208b56f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:48:50, skipping insertion in model container [2022-11-03 01:48:50,803 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:48:50" (1/1) ... [2022-11-03 01:48:50,811 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 01:48:50,872 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 01:48:51,025 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_6f42e1d3-a9ff-4931-9026-24fbc54c1252/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_vsa16a_p1.c[1107,1120] [2022-11-03 01:48:51,495 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:48:51,499 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 01:48:51,512 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_6f42e1d3-a9ff-4931-9026-24fbc54c1252/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_vsa16a_p1.c[1107,1120] [2022-11-03 01:48:51,667 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:48:51,679 INFO L208 MainTranslator]: Completed translation [2022-11-03 01:48:51,680 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:48:51 WrapperNode [2022-11-03 01:48:51,680 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 01:48:51,681 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 01:48:51,681 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 01:48:51,682 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 01:48:51,689 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:48:51" (1/1) ... [2022-11-03 01:48:51,726 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:48:51" (1/1) ... [2022-11-03 01:48:51,852 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 2290 [2022-11-03 01:48:51,853 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 01:48:51,853 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 01:48:51,854 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 01:48:51,854 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 01:48:51,863 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:48:51" (1/1) ... [2022-11-03 01:48:51,864 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:48:51" (1/1) ... [2022-11-03 01:48:51,888 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:48:51" (1/1) ... [2022-11-03 01:48:51,889 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:48:51" (1/1) ... [2022-11-03 01:48:51,969 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:48:51" (1/1) ... [2022-11-03 01:48:51,980 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:48:51" (1/1) ... [2022-11-03 01:48:51,986 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:48:51" (1/1) ... [2022-11-03 01:48:51,994 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:48:51" (1/1) ... [2022-11-03 01:48:52,009 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 01:48:52,010 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 01:48:52,010 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 01:48:52,010 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 01:48:52,011 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:48:51" (1/1) ... [2022-11-03 01:48:52,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:48:52,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:48:52,040 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 01:48:52,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 01:48:52,091 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 01:48:52,092 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 01:48:52,634 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 01:48:52,637 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 01:48:54,297 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 01:48:54,307 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 01:48:54,322 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 01:48:54,324 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:48:54 BoogieIcfgContainer [2022-11-03 01:48:54,325 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 01:48:54,327 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 01:48:54,327 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 01:48:54,330 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 01:48:54,330 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 01:48:50" (1/3) ... [2022-11-03 01:48:54,331 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5310e992 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:48:54, skipping insertion in model container [2022-11-03 01:48:54,331 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:48:51" (2/3) ... [2022-11-03 01:48:54,332 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5310e992 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:48:54, skipping insertion in model container [2022-11-03 01:48:54,332 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:48:54" (3/3) ... [2022-11-03 01:48:54,333 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.vis_arrays_vsa16a_p1.c [2022-11-03 01:48:54,358 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 01:48:54,358 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 01:48:54,415 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 01:48:54,421 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;@4198bc25, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 01:48:54,422 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 01:48:54,427 INFO L276 IsEmpty]: Start isEmpty. Operand has 269 states, 267 states have (on average 1.4981273408239701) internal successors, (400), 268 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:48:54,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-03 01:48:54,434 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:48:54,434 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-03 01:48:54,435 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:48:54,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:48:54,441 INFO L85 PathProgramCache]: Analyzing trace with hash 28698761, now seen corresponding path program 1 times [2022-11-03 01:48:54,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:48:54,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1971142199] [2022-11-03 01:48:54,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:48:54,455 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:48:54,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:48:54,462 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:48:54,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 01:48:54,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:48:55,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-03 01:48:55,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:48:55,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:48:55,150 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:48:55,151 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:48:55,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1971142199] [2022-11-03 01:48:55,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1971142199] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:48:55,152 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:48:55,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:48:55,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138659182] [2022-11-03 01:48:55,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:48:55,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:48:55,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:48:55,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:48:55,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:48:55,204 INFO L87 Difference]: Start difference. First operand has 269 states, 267 states have (on average 1.4981273408239701) internal successors, (400), 268 states have internal predecessors, (400), 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 01:48:55,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:48:55,965 INFO L93 Difference]: Finished difference Result 794 states and 1191 transitions. [2022-11-03 01:48:55,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:48:55,969 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 01:48:55,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:48:55,999 INFO L225 Difference]: With dead ends: 794 [2022-11-03 01:48:56,006 INFO L226 Difference]: Without dead ends: 527 [2022-11-03 01:48:56,010 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 01:48:56,013 INFO L413 NwaCegarLoop]: 317 mSDtfsCounter, 778 mSDsluCounter, 706 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 778 SdHoareTripleChecker+Valid, 1023 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:48:56,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [778 Valid, 1023 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 01:48:56,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2022-11-03 01:48:56,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 267. [2022-11-03 01:48:56,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 1.4887218045112782) internal successors, (396), 266 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:48:56,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 396 transitions. [2022-11-03 01:48:56,068 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 396 transitions. Word has length 5 [2022-11-03 01:48:56,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:48:56,068 INFO L495 AbstractCegarLoop]: Abstraction has 267 states and 396 transitions. [2022-11-03 01:48:56,069 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 01:48:56,069 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 396 transitions. [2022-11-03 01:48:56,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:48:56,079 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:48:56,080 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] [2022-11-03 01:48:56,101 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-03 01:48:56,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:48:56,293 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:48:56,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:48:56,294 INFO L85 PathProgramCache]: Analyzing trace with hash -464126881, now seen corresponding path program 1 times [2022-11-03 01:48:56,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:48:56,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [948740767] [2022-11-03 01:48:56,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:48:56,299 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:48:56,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:48:56,300 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:48:56,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 01:48:57,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:48:57,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 01:48:57,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:48:57,369 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 01:48:57,370 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:48:57,370 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:48:57,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [948740767] [2022-11-03 01:48:57,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [948740767] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:48:57,371 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:48:57,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:48:57,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637800050] [2022-11-03 01:48:57,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:48:57,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:48:57,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:48:57,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:48:57,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:48:57,375 INFO L87 Difference]: Start difference. First operand 267 states and 396 transitions. Second operand has 4 states, 4 states have (on average 66.5) internal successors, (266), 4 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:48:57,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:48:57,468 INFO L93 Difference]: Finished difference Result 1051 states and 1566 transitions. [2022-11-03 01:48:57,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:48:57,468 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 66.5) internal successors, (266), 4 states have internal predecessors, (266), 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 266 [2022-11-03 01:48:57,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:48:57,473 INFO L225 Difference]: With dead ends: 1051 [2022-11-03 01:48:57,473 INFO L226 Difference]: Without dead ends: 788 [2022-11-03 01:48:57,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:48:57,475 INFO L413 NwaCegarLoop]: 390 mSDtfsCounter, 1161 mSDsluCounter, 1155 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1161 SdHoareTripleChecker+Valid, 1545 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:48:57,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1161 Valid, 1545 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:48:57,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2022-11-03 01:48:57,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 269. [2022-11-03 01:48:57,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 1.4850746268656716) internal successors, (398), 268 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:48:57,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 398 transitions. [2022-11-03 01:48:57,499 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 398 transitions. Word has length 266 [2022-11-03 01:48:57,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:48:57,499 INFO L495 AbstractCegarLoop]: Abstraction has 269 states and 398 transitions. [2022-11-03 01:48:57,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 66.5) internal successors, (266), 4 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:48:57,500 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 398 transitions. [2022-11-03 01:48:57,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:48:57,504 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:48:57,504 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] [2022-11-03 01:48:57,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 01:48:57,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:48:57,728 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:48:57,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:48:57,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1368255329, now seen corresponding path program 1 times [2022-11-03 01:48:57,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:48:57,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [12115128] [2022-11-03 01:48:57,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:48:57,733 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:48:57,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:48:57,738 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:48:57,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 01:48:58,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:48:58,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:48:58,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:48:58,809 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 01:48:58,809 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:48:58,810 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:48:58,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [12115128] [2022-11-03 01:48:58,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [12115128] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:48:58,811 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:48:58,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:48:58,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198912432] [2022-11-03 01:48:58,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:48:58,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:48:58,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:48:58,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:48:58,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:48:58,814 INFO L87 Difference]: Start difference. First operand 269 states and 398 transitions. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:48:59,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:48:59,041 INFO L93 Difference]: Finished difference Result 1056 states and 1570 transitions. [2022-11-03 01:48:59,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:48:59,043 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 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 266 [2022-11-03 01:48:59,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:48:59,046 INFO L225 Difference]: With dead ends: 1056 [2022-11-03 01:48:59,046 INFO L226 Difference]: Without dead ends: 793 [2022-11-03 01:48:59,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:48:59,049 INFO L413 NwaCegarLoop]: 384 mSDtfsCounter, 1545 mSDsluCounter, 1902 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1545 SdHoareTripleChecker+Valid, 2286 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:48:59,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1545 Valid, 2286 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:48:59,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2022-11-03 01:48:59,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 273. [2022-11-03 01:48:59,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 1.4816176470588236) internal successors, (403), 272 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:48:59,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 403 transitions. [2022-11-03 01:48:59,067 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 403 transitions. Word has length 266 [2022-11-03 01:48:59,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:48:59,067 INFO L495 AbstractCegarLoop]: Abstraction has 273 states and 403 transitions. [2022-11-03 01:48:59,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:48:59,068 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 403 transitions. [2022-11-03 01:48:59,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:48:59,072 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:48:59,072 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] [2022-11-03 01:48:59,101 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-03 01:48:59,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:48:59,294 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:48:59,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:48:59,295 INFO L85 PathProgramCache]: Analyzing trace with hash 579447651, now seen corresponding path program 1 times [2022-11-03 01:48:59,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:48:59,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1896611133] [2022-11-03 01:48:59,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:48:59,297 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:48:59,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:48:59,301 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:48:59,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-03 01:49:00,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:00,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 01:49:00,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:49:00,386 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 01:49:00,386 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:49:00,387 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:49:00,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1896611133] [2022-11-03 01:49:00,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1896611133] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:49:00,388 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:49:00,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:49:00,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76242095] [2022-11-03 01:49:00,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:49:00,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:49:00,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:49:00,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:49:00,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:49:00,391 INFO L87 Difference]: Start difference. First operand 273 states and 403 transitions. Second operand has 4 states, 4 states have (on average 66.5) internal successors, (266), 4 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:01,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:49:01,015 INFO L93 Difference]: Finished difference Result 1051 states and 1564 transitions. [2022-11-03 01:49:01,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:49:01,017 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 66.5) internal successors, (266), 4 states have internal predecessors, (266), 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 266 [2022-11-03 01:49:01,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:49:01,020 INFO L225 Difference]: With dead ends: 1051 [2022-11-03 01:49:01,020 INFO L226 Difference]: Without dead ends: 788 [2022-11-03 01:49:01,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:49:01,022 INFO L413 NwaCegarLoop]: 330 mSDtfsCounter, 1139 mSDsluCounter, 1003 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1139 SdHoareTripleChecker+Valid, 1333 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:49:01,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1139 Valid, 1333 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 01:49:01,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2022-11-03 01:49:01,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 277. [2022-11-03 01:49:01,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 276 states have (on average 1.4782608695652173) internal successors, (408), 276 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:01,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 408 transitions. [2022-11-03 01:49:01,052 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 408 transitions. Word has length 266 [2022-11-03 01:49:01,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:49:01,052 INFO L495 AbstractCegarLoop]: Abstraction has 277 states and 408 transitions. [2022-11-03 01:49:01,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 66.5) internal successors, (266), 4 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:01,053 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 408 transitions. [2022-11-03 01:49:01,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:49:01,057 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:49:01,057 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] [2022-11-03 01:49:01,082 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-03 01:49:01,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:49:01,278 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:49:01,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:49:01,279 INFO L85 PathProgramCache]: Analyzing trace with hash 735689829, now seen corresponding path program 1 times [2022-11-03 01:49:01,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:49:01,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [507349586] [2022-11-03 01:49:01,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:01,282 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:49:01,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:49:01,283 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:49:01,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-03 01:49:02,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:02,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 01:49:02,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:49:02,389 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 01:49:02,389 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:49:02,389 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:49:02,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [507349586] [2022-11-03 01:49:02,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [507349586] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:49:02,390 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:49:02,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:49:02,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581093063] [2022-11-03 01:49:02,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:49:02,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:49:02,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:49:02,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:49:02,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:49:02,393 INFO L87 Difference]: Start difference. First operand 277 states and 408 transitions. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:03,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:49:03,037 INFO L93 Difference]: Finished difference Result 1064 states and 1580 transitions. [2022-11-03 01:49:03,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:49:03,039 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 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 266 [2022-11-03 01:49:03,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:49:03,042 INFO L225 Difference]: With dead ends: 1064 [2022-11-03 01:49:03,042 INFO L226 Difference]: Without dead ends: 801 [2022-11-03 01:49:03,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:49:03,044 INFO L413 NwaCegarLoop]: 331 mSDtfsCounter, 1540 mSDsluCounter, 1774 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1540 SdHoareTripleChecker+Valid, 2105 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:49:03,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1540 Valid, 2105 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 01:49:03,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 801 states. [2022-11-03 01:49:03,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 801 to 279. [2022-11-03 01:49:03,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 1.474820143884892) internal successors, (410), 278 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:03,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 410 transitions. [2022-11-03 01:49:03,056 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 410 transitions. Word has length 266 [2022-11-03 01:49:03,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:49:03,056 INFO L495 AbstractCegarLoop]: Abstraction has 279 states and 410 transitions. [2022-11-03 01:49:03,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:03,057 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 410 transitions. [2022-11-03 01:49:03,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:49:03,061 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:49:03,061 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] [2022-11-03 01:49:03,092 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-03 01:49:03,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:49:03,274 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:49:03,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:49:03,275 INFO L85 PathProgramCache]: Analyzing trace with hash 1419650535, now seen corresponding path program 1 times [2022-11-03 01:49:03,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:49:03,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [692223926] [2022-11-03 01:49:03,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:03,277 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:49:03,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:49:03,279 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:49:03,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-03 01:49:04,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:04,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 01:49:04,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:49:04,379 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 01:49:04,380 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:49:04,380 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:49:04,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [692223926] [2022-11-03 01:49:04,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [692223926] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:49:04,381 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:49:04,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:49:04,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339493399] [2022-11-03 01:49:04,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:49:04,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:49:04,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:49:04,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:49:04,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:49:04,384 INFO L87 Difference]: Start difference. First operand 279 states and 410 transitions. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:05,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:49:05,018 INFO L93 Difference]: Finished difference Result 1064 states and 1579 transitions. [2022-11-03 01:49:05,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:49:05,020 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 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 266 [2022-11-03 01:49:05,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:49:05,022 INFO L225 Difference]: With dead ends: 1064 [2022-11-03 01:49:05,023 INFO L226 Difference]: Without dead ends: 801 [2022-11-03 01:49:05,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:49:05,024 INFO L413 NwaCegarLoop]: 333 mSDtfsCounter, 1533 mSDsluCounter, 1768 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1533 SdHoareTripleChecker+Valid, 2101 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:49:05,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1533 Valid, 2101 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 01:49:05,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 801 states. [2022-11-03 01:49:05,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 801 to 281. [2022-11-03 01:49:05,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 1.4714285714285715) internal successors, (412), 280 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:05,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 412 transitions. [2022-11-03 01:49:05,035 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 412 transitions. Word has length 266 [2022-11-03 01:49:05,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:49:05,036 INFO L495 AbstractCegarLoop]: Abstraction has 281 states and 412 transitions. [2022-11-03 01:49:05,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:05,036 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 412 transitions. [2022-11-03 01:49:05,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:49:05,040 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:49:05,040 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] [2022-11-03 01:49:05,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-03 01:49:05,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:49:05,263 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:49:05,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:49:05,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1192429545, now seen corresponding path program 1 times [2022-11-03 01:49:05,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:49:05,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1701224974] [2022-11-03 01:49:05,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:05,265 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:49:05,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:49:05,267 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:49:05,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-03 01:49:06,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:06,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:49:06,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:49:06,301 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 01:49:06,302 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:49:06,302 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:49:06,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1701224974] [2022-11-03 01:49:06,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1701224974] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:49:06,303 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:49:06,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:49:06,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526052973] [2022-11-03 01:49:06,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:49:06,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:49:06,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:49:06,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:49:06,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:49:06,305 INFO L87 Difference]: Start difference. First operand 281 states and 412 transitions. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:06,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:49:06,530 INFO L93 Difference]: Finished difference Result 1064 states and 1578 transitions. [2022-11-03 01:49:06,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:49:06,532 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 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 266 [2022-11-03 01:49:06,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:49:06,534 INFO L225 Difference]: With dead ends: 1064 [2022-11-03 01:49:06,534 INFO L226 Difference]: Without dead ends: 801 [2022-11-03 01:49:06,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:49:06,536 INFO L413 NwaCegarLoop]: 395 mSDtfsCounter, 1526 mSDsluCounter, 1882 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1526 SdHoareTripleChecker+Valid, 2277 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:49:06,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1526 Valid, 2277 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:49:06,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 801 states. [2022-11-03 01:49:06,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 801 to 283. [2022-11-03 01:49:06,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 1.4680851063829787) internal successors, (414), 282 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:06,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 414 transitions. [2022-11-03 01:49:06,547 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 414 transitions. Word has length 266 [2022-11-03 01:49:06,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:49:06,547 INFO L495 AbstractCegarLoop]: Abstraction has 283 states and 414 transitions. [2022-11-03 01:49:06,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:06,548 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 414 transitions. [2022-11-03 01:49:06,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:49:06,551 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:49:06,551 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] [2022-11-03 01:49:06,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-03 01:49:06,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:49:06,783 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:49:06,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:49:06,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1308394091, now seen corresponding path program 1 times [2022-11-03 01:49:06,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:49:06,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1229444836] [2022-11-03 01:49:06,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:06,786 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:49:06,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:49:06,787 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:49:06,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-03 01:49:07,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:07,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:49:07,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:49:07,821 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 01:49:07,822 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:49:07,822 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:49:07,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1229444836] [2022-11-03 01:49:07,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1229444836] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:49:07,822 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:49:07,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:49:07,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291037043] [2022-11-03 01:49:07,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:49:07,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:49:07,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:49:07,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:49:07,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:49:07,825 INFO L87 Difference]: Start difference. First operand 283 states and 414 transitions. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:07,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:49:07,978 INFO L93 Difference]: Finished difference Result 1072 states and 1589 transitions. [2022-11-03 01:49:07,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:49:07,979 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 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 266 [2022-11-03 01:49:07,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:49:07,982 INFO L225 Difference]: With dead ends: 1072 [2022-11-03 01:49:07,982 INFO L226 Difference]: Without dead ends: 809 [2022-11-03 01:49:07,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:49:07,984 INFO L413 NwaCegarLoop]: 408 mSDtfsCounter, 1530 mSDsluCounter, 1898 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1530 SdHoareTripleChecker+Valid, 2306 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:49:07,985 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1530 Valid, 2306 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:49:07,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 809 states. [2022-11-03 01:49:07,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 809 to 287. [2022-11-03 01:49:07,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 1.465034965034965) internal successors, (419), 286 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:07,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 419 transitions. [2022-11-03 01:49:07,995 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 419 transitions. Word has length 266 [2022-11-03 01:49:07,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:49:07,995 INFO L495 AbstractCegarLoop]: Abstraction has 287 states and 419 transitions. [2022-11-03 01:49:07,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:07,996 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 419 transitions. [2022-11-03 01:49:07,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:49:07,999 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:49:07,999 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] [2022-11-03 01:49:08,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-03 01:49:08,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:49:08,223 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:49:08,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:49:08,223 INFO L85 PathProgramCache]: Analyzing trace with hash -365195795, now seen corresponding path program 1 times [2022-11-03 01:49:08,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:49:08,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1606928947] [2022-11-03 01:49:08,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:08,225 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:49:08,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:49:08,228 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:49:08,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-03 01:49:09,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:09,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:49:09,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:49:09,240 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 01:49:09,240 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:49:09,240 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:49:09,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1606928947] [2022-11-03 01:49:09,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1606928947] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:49:09,241 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:49:09,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:49:09,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999421104] [2022-11-03 01:49:09,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:49:09,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:49:09,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:49:09,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:49:09,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:49:09,243 INFO L87 Difference]: Start difference. First operand 287 states and 419 transitions. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:09,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:49:09,404 INFO L93 Difference]: Finished difference Result 1072 states and 1588 transitions. [2022-11-03 01:49:09,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:49:09,405 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 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 266 [2022-11-03 01:49:09,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:49:09,407 INFO L225 Difference]: With dead ends: 1072 [2022-11-03 01:49:09,408 INFO L226 Difference]: Without dead ends: 809 [2022-11-03 01:49:09,408 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:49:09,411 INFO L413 NwaCegarLoop]: 410 mSDtfsCounter, 1523 mSDsluCounter, 1892 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1523 SdHoareTripleChecker+Valid, 2302 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:49:09,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1523 Valid, 2302 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:49:09,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 809 states. [2022-11-03 01:49:09,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 809 to 289. [2022-11-03 01:49:09,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 1.4618055555555556) internal successors, (421), 288 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:09,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 421 transitions. [2022-11-03 01:49:09,422 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 421 transitions. Word has length 266 [2022-11-03 01:49:09,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:49:09,423 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 421 transitions. [2022-11-03 01:49:09,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:09,423 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 421 transitions. [2022-11-03 01:49:09,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:49:09,426 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:49:09,427 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] [2022-11-03 01:49:09,456 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-03 01:49:09,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:49:09,643 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:49:09,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:49:09,643 INFO L85 PathProgramCache]: Analyzing trace with hash -764702225, now seen corresponding path program 1 times [2022-11-03 01:49:09,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:49:09,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2084652074] [2022-11-03 01:49:09,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:09,645 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:49:09,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:49:09,646 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:49:09,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-03 01:49:10,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:10,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:49:10,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:49:10,687 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 01:49:10,687 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:49:10,687 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:49:10,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2084652074] [2022-11-03 01:49:10,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2084652074] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:49:10,688 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:49:10,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:49:10,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260725878] [2022-11-03 01:49:10,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:49:10,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:49:10,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:49:10,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:49:10,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:49:10,692 INFO L87 Difference]: Start difference. First operand 289 states and 421 transitions. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:10,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:49:10,848 INFO L93 Difference]: Finished difference Result 1072 states and 1587 transitions. [2022-11-03 01:49:10,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:49:10,849 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 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 266 [2022-11-03 01:49:10,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:49:10,854 INFO L225 Difference]: With dead ends: 1072 [2022-11-03 01:49:10,854 INFO L226 Difference]: Without dead ends: 809 [2022-11-03 01:49:10,855 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:49:10,856 INFO L413 NwaCegarLoop]: 412 mSDtfsCounter, 1516 mSDsluCounter, 1886 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1516 SdHoareTripleChecker+Valid, 2298 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:49:10,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1516 Valid, 2298 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:49:10,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 809 states. [2022-11-03 01:49:10,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 809 to 291. [2022-11-03 01:49:10,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 1.4586206896551723) internal successors, (423), 290 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:10,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 423 transitions. [2022-11-03 01:49:10,866 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 423 transitions. Word has length 266 [2022-11-03 01:49:10,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:49:10,867 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 423 transitions. [2022-11-03 01:49:10,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:10,867 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 423 transitions. [2022-11-03 01:49:10,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:49:10,870 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:49:10,871 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] [2022-11-03 01:49:10,895 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-03 01:49:11,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:49:11,087 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:49:11,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:49:11,088 INFO L85 PathProgramCache]: Analyzing trace with hash -412045711, now seen corresponding path program 1 times [2022-11-03 01:49:11,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:49:11,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [480421189] [2022-11-03 01:49:11,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:11,090 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:49:11,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:49:11,091 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:49:11,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-03 01:49:11,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:12,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:49:12,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:49:12,168 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 01:49:12,169 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:49:12,170 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:49:12,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [480421189] [2022-11-03 01:49:12,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [480421189] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:49:12,170 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:49:12,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:49:12,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445364989] [2022-11-03 01:49:12,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:49:12,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:49:12,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:49:12,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:49:12,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:49:12,173 INFO L87 Difference]: Start difference. First operand 291 states and 423 transitions. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:12,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:49:12,327 INFO L93 Difference]: Finished difference Result 1072 states and 1586 transitions. [2022-11-03 01:49:12,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:49:12,328 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 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 266 [2022-11-03 01:49:12,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:49:12,331 INFO L225 Difference]: With dead ends: 1072 [2022-11-03 01:49:12,331 INFO L226 Difference]: Without dead ends: 809 [2022-11-03 01:49:12,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:49:12,333 INFO L413 NwaCegarLoop]: 414 mSDtfsCounter, 1509 mSDsluCounter, 1880 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1509 SdHoareTripleChecker+Valid, 2294 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:49:12,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1509 Valid, 2294 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:49:12,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 809 states. [2022-11-03 01:49:12,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 809 to 293. [2022-11-03 01:49:12,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 1.4554794520547945) internal successors, (425), 292 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:12,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 425 transitions. [2022-11-03 01:49:12,344 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 425 transitions. Word has length 266 [2022-11-03 01:49:12,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:49:12,344 INFO L495 AbstractCegarLoop]: Abstraction has 293 states and 425 transitions. [2022-11-03 01:49:12,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:12,345 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 425 transitions. [2022-11-03 01:49:12,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:49:12,348 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:49:12,348 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] [2022-11-03 01:49:12,376 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-03 01:49:12,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:49:12,562 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:49:12,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:49:12,563 INFO L85 PathProgramCache]: Analyzing trace with hash 884409203, now seen corresponding path program 1 times [2022-11-03 01:49:12,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:49:12,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [221446496] [2022-11-03 01:49:12,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:12,564 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:49:12,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:49:12,565 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:49:12,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-03 01:49:13,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:13,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:49:13,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:49:13,519 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 01:49:13,520 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:49:13,520 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:49:13,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [221446496] [2022-11-03 01:49:13,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [221446496] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:49:13,521 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:49:13,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:49:13,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039566724] [2022-11-03 01:49:13,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:49:13,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:49:13,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:49:13,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:49:13,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:49:13,523 INFO L87 Difference]: Start difference. First operand 293 states and 425 transitions. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:13,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:49:13,694 INFO L93 Difference]: Finished difference Result 1056 states and 1561 transitions. [2022-11-03 01:49:13,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:49:13,695 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 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 266 [2022-11-03 01:49:13,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:49:13,698 INFO L225 Difference]: With dead ends: 1056 [2022-11-03 01:49:13,698 INFO L226 Difference]: Without dead ends: 793 [2022-11-03 01:49:13,699 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:49:13,700 INFO L413 NwaCegarLoop]: 417 mSDtfsCounter, 1467 mSDsluCounter, 1840 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1467 SdHoareTripleChecker+Valid, 2257 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:49:13,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1467 Valid, 2257 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:49:13,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2022-11-03 01:49:13,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 297. [2022-11-03 01:49:13,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 1.4527027027027026) internal successors, (430), 296 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:13,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 430 transitions. [2022-11-03 01:49:13,710 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 430 transitions. Word has length 266 [2022-11-03 01:49:13,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:49:13,711 INFO L495 AbstractCegarLoop]: Abstraction has 297 states and 430 transitions. [2022-11-03 01:49:13,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:13,711 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 430 transitions. [2022-11-03 01:49:13,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:49:13,713 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:49:13,713 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] [2022-11-03 01:49:13,737 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2022-11-03 01:49:13,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:49:13,935 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:49:13,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:49:13,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1222912373, now seen corresponding path program 1 times [2022-11-03 01:49:13,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:49:13,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1691089416] [2022-11-03 01:49:13,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:13,937 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:49:13,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:49:13,938 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:49:13,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-03 01:49:14,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:14,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:49:14,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:49:15,083 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 01:49:15,083 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:49:15,084 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:49:15,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1691089416] [2022-11-03 01:49:15,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1691089416] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:49:15,084 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:49:15,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 01:49:15,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143336925] [2022-11-03 01:49:15,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:49:15,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:49:15,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:49:15,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:49:15,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:49:15,086 INFO L87 Difference]: Start difference. First operand 297 states and 430 transitions. Second operand has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:15,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:49:15,363 INFO L93 Difference]: Finished difference Result 1084 states and 1602 transitions. [2022-11-03 01:49:15,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 01:49:15,365 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 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 266 [2022-11-03 01:49:15,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:49:15,369 INFO L225 Difference]: With dead ends: 1084 [2022-11-03 01:49:15,370 INFO L226 Difference]: Without dead ends: 821 [2022-11-03 01:49:15,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 01:49:15,371 INFO L413 NwaCegarLoop]: 413 mSDtfsCounter, 1892 mSDsluCounter, 2581 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1892 SdHoareTripleChecker+Valid, 2994 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:49:15,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1892 Valid, 2994 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:49:15,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 821 states. [2022-11-03 01:49:15,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 821 to 299. [2022-11-03 01:49:15,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 1.4496644295302012) internal successors, (432), 298 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:15,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 432 transitions. [2022-11-03 01:49:15,383 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 432 transitions. Word has length 266 [2022-11-03 01:49:15,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:49:15,385 INFO L495 AbstractCegarLoop]: Abstraction has 299 states and 432 transitions. [2022-11-03 01:49:15,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:15,385 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 432 transitions. [2022-11-03 01:49:15,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:49:15,387 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:49:15,387 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] [2022-11-03 01:49:15,416 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-03 01:49:15,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:49:15,606 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:49:15,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:49:15,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1254549495, now seen corresponding path program 1 times [2022-11-03 01:49:15,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:49:15,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [787478688] [2022-11-03 01:49:15,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:15,609 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:49:15,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:49:15,610 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:49:15,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-03 01:49:16,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:16,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:49:16,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:49:16,565 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 01:49:16,565 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:49:16,565 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:49:16,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [787478688] [2022-11-03 01:49:16,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [787478688] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:49:16,566 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:49:16,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:49:16,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861983531] [2022-11-03 01:49:16,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:49:16,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:49:16,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:49:16,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:49:16,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:49:16,568 INFO L87 Difference]: Start difference. First operand 299 states and 432 transitions. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:16,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:49:16,720 INFO L93 Difference]: Finished difference Result 1056 states and 1559 transitions. [2022-11-03 01:49:16,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:49:16,721 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 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 266 [2022-11-03 01:49:16,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:49:16,724 INFO L225 Difference]: With dead ends: 1056 [2022-11-03 01:49:16,724 INFO L226 Difference]: Without dead ends: 793 [2022-11-03 01:49:16,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:49:16,725 INFO L413 NwaCegarLoop]: 422 mSDtfsCounter, 1453 mSDsluCounter, 1829 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1453 SdHoareTripleChecker+Valid, 2251 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:49:16,726 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1453 Valid, 2251 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:49:16,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2022-11-03 01:49:16,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 301. [2022-11-03 01:49:16,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 1.4466666666666668) internal successors, (434), 300 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:16,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 434 transitions. [2022-11-03 01:49:16,737 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 434 transitions. Word has length 266 [2022-11-03 01:49:16,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:49:16,738 INFO L495 AbstractCegarLoop]: Abstraction has 301 states and 434 transitions. [2022-11-03 01:49:16,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:16,738 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 434 transitions. [2022-11-03 01:49:16,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:49:16,740 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:49:16,740 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] [2022-11-03 01:49:16,770 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-03 01:49:16,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:49:16,957 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:49:16,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:49:16,957 INFO L85 PathProgramCache]: Analyzing trace with hash 65756921, now seen corresponding path program 1 times [2022-11-03 01:49:16,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:49:16,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1034477514] [2022-11-03 01:49:16,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:16,959 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:49:16,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:49:16,960 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:49:16,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-03 01:49:17,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:17,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:49:17,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:49:18,002 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 01:49:18,002 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:49:18,003 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:49:18,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1034477514] [2022-11-03 01:49:18,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1034477514] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:49:18,003 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:49:18,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 01:49:18,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380071788] [2022-11-03 01:49:18,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:49:18,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:49:18,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:49:18,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:49:18,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:49:18,005 INFO L87 Difference]: Start difference. First operand 301 states and 434 transitions. Second operand has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:18,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:49:18,237 INFO L93 Difference]: Finished difference Result 1072 states and 1582 transitions. [2022-11-03 01:49:18,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 01:49:18,238 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 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 266 [2022-11-03 01:49:18,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:49:18,242 INFO L225 Difference]: With dead ends: 1072 [2022-11-03 01:49:18,242 INFO L226 Difference]: Without dead ends: 809 [2022-11-03 01:49:18,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 01:49:18,243 INFO L413 NwaCegarLoop]: 416 mSDtfsCounter, 1847 mSDsluCounter, 2546 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1847 SdHoareTripleChecker+Valid, 2962 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:49:18,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1847 Valid, 2962 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:49:18,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 809 states. [2022-11-03 01:49:18,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 809 to 305. [2022-11-03 01:49:18,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 1.444078947368421) internal successors, (439), 304 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:18,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 439 transitions. [2022-11-03 01:49:18,253 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 439 transitions. Word has length 266 [2022-11-03 01:49:18,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:49:18,253 INFO L495 AbstractCegarLoop]: Abstraction has 305 states and 439 transitions. [2022-11-03 01:49:18,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:18,254 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 439 transitions. [2022-11-03 01:49:18,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:49:18,255 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:49:18,255 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] [2022-11-03 01:49:18,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-03 01:49:18,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:49:18,480 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:49:18,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:49:18,481 INFO L85 PathProgramCache]: Analyzing trace with hash -598235397, now seen corresponding path program 1 times [2022-11-03 01:49:18,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:49:18,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2100275887] [2022-11-03 01:49:18,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:18,483 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:49:18,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:49:18,484 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:49:18,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-03 01:49:19,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:19,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:49:19,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:49:19,395 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 01:49:19,396 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:49:19,396 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:49:19,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2100275887] [2022-11-03 01:49:19,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2100275887] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:49:19,396 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:49:19,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:49:19,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220335069] [2022-11-03 01:49:19,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:49:19,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:49:19,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:49:19,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:49:19,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:49:19,398 INFO L87 Difference]: Start difference. First operand 305 states and 439 transitions. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:19,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:49:19,595 INFO L93 Difference]: Finished difference Result 1072 states and 1581 transitions. [2022-11-03 01:49:19,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:49:19,596 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 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 266 [2022-11-03 01:49:19,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:49:19,599 INFO L225 Difference]: With dead ends: 1072 [2022-11-03 01:49:19,599 INFO L226 Difference]: Without dead ends: 809 [2022-11-03 01:49:19,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:49:19,601 INFO L413 NwaCegarLoop]: 425 mSDtfsCounter, 1459 mSDsluCounter, 1815 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1459 SdHoareTripleChecker+Valid, 2240 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:49:19,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1459 Valid, 2240 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:49:19,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 809 states. [2022-11-03 01:49:19,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 809 to 309. [2022-11-03 01:49:19,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 1.4415584415584415) internal successors, (444), 308 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:19,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 444 transitions. [2022-11-03 01:49:19,617 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 444 transitions. Word has length 266 [2022-11-03 01:49:19,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:49:19,617 INFO L495 AbstractCegarLoop]: Abstraction has 309 states and 444 transitions. [2022-11-03 01:49:19,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:19,618 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 444 transitions. [2022-11-03 01:49:19,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:49:19,619 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:49:19,620 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] [2022-11-03 01:49:19,649 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-03 01:49:19,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:49:19,834 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:49:19,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:49:19,835 INFO L85 PathProgramCache]: Analyzing trace with hash 178012157, now seen corresponding path program 1 times [2022-11-03 01:49:19,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:49:19,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1349314399] [2022-11-03 01:49:19,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:19,836 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:49:19,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:49:19,837 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:49:19,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-03 01:49:20,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:20,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 01:49:20,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:49:20,829 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 01:49:20,830 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:49:20,830 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:49:20,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1349314399] [2022-11-03 01:49:20,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1349314399] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:49:20,830 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:49:20,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:49:20,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067410782] [2022-11-03 01:49:20,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:49:20,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:49:20,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:49:20,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:49:20,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:49:20,832 INFO L87 Difference]: Start difference. First operand 309 states and 444 transitions. Second operand has 4 states, 4 states have (on average 66.5) internal successors, (266), 4 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:21,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:49:21,378 INFO L93 Difference]: Finished difference Result 1051 states and 1551 transitions. [2022-11-03 01:49:21,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:49:21,379 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 66.5) internal successors, (266), 4 states have internal predecessors, (266), 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 266 [2022-11-03 01:49:21,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:49:21,382 INFO L225 Difference]: With dead ends: 1051 [2022-11-03 01:49:21,382 INFO L226 Difference]: Without dead ends: 788 [2022-11-03 01:49:21,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:49:21,383 INFO L413 NwaCegarLoop]: 368 mSDtfsCounter, 1041 mSDsluCounter, 952 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1041 SdHoareTripleChecker+Valid, 1320 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 01:49:21,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1041 Valid, 1320 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 01:49:21,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2022-11-03 01:49:21,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 311. [2022-11-03 01:49:21,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 1.4387096774193548) internal successors, (446), 310 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:21,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 446 transitions. [2022-11-03 01:49:21,394 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 446 transitions. Word has length 266 [2022-11-03 01:49:21,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:49:21,395 INFO L495 AbstractCegarLoop]: Abstraction has 311 states and 446 transitions. [2022-11-03 01:49:21,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 66.5) internal successors, (266), 4 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:21,395 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 446 transitions. [2022-11-03 01:49:21,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:49:21,397 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:49:21,397 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] [2022-11-03 01:49:21,426 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-03 01:49:21,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:49:21,621 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:49:21,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:49:21,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1680395905, now seen corresponding path program 1 times [2022-11-03 01:49:21,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:49:21,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1955500071] [2022-11-03 01:49:21,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:21,623 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:49:21,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:49:21,624 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:49:21,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-03 01:49:22,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:22,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 01:49:22,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:49:22,545 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 01:49:22,545 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:49:22,545 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:49:22,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1955500071] [2022-11-03 01:49:22,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1955500071] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:49:22,546 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:49:22,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:49:22,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658239414] [2022-11-03 01:49:22,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:49:22,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:49:22,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:49:22,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:49:22,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:49:22,548 INFO L87 Difference]: Start difference. First operand 311 states and 446 transitions. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:23,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:49:23,139 INFO L93 Difference]: Finished difference Result 1098 states and 1618 transitions. [2022-11-03 01:49:23,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:49:23,141 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 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 266 [2022-11-03 01:49:23,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:49:23,144 INFO L225 Difference]: With dead ends: 1098 [2022-11-03 01:49:23,144 INFO L226 Difference]: Without dead ends: 835 [2022-11-03 01:49:23,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:49:23,145 INFO L413 NwaCegarLoop]: 369 mSDtfsCounter, 1493 mSDsluCounter, 1719 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1493 SdHoareTripleChecker+Valid, 2088 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 01:49:23,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1493 Valid, 2088 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 01:49:23,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 835 states. [2022-11-03 01:49:23,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 835 to 313. [2022-11-03 01:49:23,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 1.435897435897436) internal successors, (448), 312 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:23,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 448 transitions. [2022-11-03 01:49:23,154 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 448 transitions. Word has length 266 [2022-11-03 01:49:23,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:49:23,155 INFO L495 AbstractCegarLoop]: Abstraction has 313 states and 448 transitions. [2022-11-03 01:49:23,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:23,155 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 448 transitions. [2022-11-03 01:49:23,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:49:23,157 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:49:23,157 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] [2022-11-03 01:49:23,186 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-03 01:49:23,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:49:23,381 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:49:23,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:49:23,382 INFO L85 PathProgramCache]: Analyzing trace with hash 851745665, now seen corresponding path program 1 times [2022-11-03 01:49:23,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:49:23,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1439426793] [2022-11-03 01:49:23,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:23,384 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:49:23,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:49:23,385 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:49:23,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-03 01:49:24,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:24,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 01:49:24,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:49:24,408 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 01:49:24,408 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:49:24,409 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:49:24,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1439426793] [2022-11-03 01:49:24,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1439426793] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:49:24,409 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:49:24,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:49:24,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276263836] [2022-11-03 01:49:24,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:49:24,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:49:24,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:49:24,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:49:24,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:49:24,411 INFO L87 Difference]: Start difference. First operand 313 states and 448 transitions. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:24,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:49:24,969 INFO L93 Difference]: Finished difference Result 1098 states and 1617 transitions. [2022-11-03 01:49:24,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:49:24,970 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 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 266 [2022-11-03 01:49:24,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:49:24,973 INFO L225 Difference]: With dead ends: 1098 [2022-11-03 01:49:24,973 INFO L226 Difference]: Without dead ends: 835 [2022-11-03 01:49:24,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:49:24,974 INFO L413 NwaCegarLoop]: 371 mSDtfsCounter, 1486 mSDsluCounter, 1713 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1486 SdHoareTripleChecker+Valid, 2084 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 01:49:24,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1486 Valid, 2084 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 01:49:24,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 835 states. [2022-11-03 01:49:24,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 835 to 315. [2022-11-03 01:49:24,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 1.4331210191082802) internal successors, (450), 314 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:24,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 450 transitions. [2022-11-03 01:49:24,983 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 450 transitions. Word has length 266 [2022-11-03 01:49:24,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:49:24,984 INFO L495 AbstractCegarLoop]: Abstraction has 315 states and 450 transitions. [2022-11-03 01:49:24,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:24,984 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 450 transitions. [2022-11-03 01:49:24,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:49:24,985 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:49:24,986 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] [2022-11-03 01:49:25,014 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-03 01:49:25,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:49:25,202 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:49:25,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:49:25,202 INFO L85 PathProgramCache]: Analyzing trace with hash 849911299, now seen corresponding path program 1 times [2022-11-03 01:49:25,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:49:25,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1896189298] [2022-11-03 01:49:25,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:25,204 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:49:25,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:49:25,205 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:49:25,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-03 01:49:25,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:25,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:49:25,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:49:26,087 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 01:49:26,088 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:49:26,088 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:49:26,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1896189298] [2022-11-03 01:49:26,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1896189298] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:49:26,088 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:49:26,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:49:26,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438565109] [2022-11-03 01:49:26,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:49:26,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:49:26,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:49:26,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:49:26,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:49:26,090 INFO L87 Difference]: Start difference. First operand 315 states and 450 transitions. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:26,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:49:26,238 INFO L93 Difference]: Finished difference Result 1056 states and 1553 transitions. [2022-11-03 01:49:26,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:49:26,239 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 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 266 [2022-11-03 01:49:26,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:49:26,244 INFO L225 Difference]: With dead ends: 1056 [2022-11-03 01:49:26,244 INFO L226 Difference]: Without dead ends: 793 [2022-11-03 01:49:26,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:49:26,249 INFO L413 NwaCegarLoop]: 443 mSDtfsCounter, 1396 mSDsluCounter, 1776 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1396 SdHoareTripleChecker+Valid, 2219 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:49:26,249 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1396 Valid, 2219 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:49:26,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2022-11-03 01:49:26,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 319. [2022-11-03 01:49:26,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 1.430817610062893) internal successors, (455), 318 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:26,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 455 transitions. [2022-11-03 01:49:26,270 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 455 transitions. Word has length 266 [2022-11-03 01:49:26,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:49:26,271 INFO L495 AbstractCegarLoop]: Abstraction has 319 states and 455 transitions. [2022-11-03 01:49:26,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:26,271 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 455 transitions. [2022-11-03 01:49:26,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:49:26,273 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:49:26,273 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] [2022-11-03 01:49:26,303 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-03 01:49:26,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:49:26,497 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:49:26,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:49:26,498 INFO L85 PathProgramCache]: Analyzing trace with hash 979775877, now seen corresponding path program 1 times [2022-11-03 01:49:26,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:49:26,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1918472334] [2022-11-03 01:49:26,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:26,500 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:49:26,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:49:26,502 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:49:26,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-03 01:49:27,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:27,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 01:49:27,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:49:27,631 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 01:49:27,632 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:49:27,632 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:49:27,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1918472334] [2022-11-03 01:49:27,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1918472334] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:49:27,633 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:49:27,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 01:49:27,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573930089] [2022-11-03 01:49:27,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:49:27,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:49:27,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:49:27,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:49:27,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:49:27,635 INFO L87 Difference]: Start difference. First operand 319 states and 455 transitions. Second operand has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:28,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:49:28,479 INFO L93 Difference]: Finished difference Result 1084 states and 1594 transitions. [2022-11-03 01:49:28,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 01:49:28,480 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 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 266 [2022-11-03 01:49:28,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:49:28,483 INFO L225 Difference]: With dead ends: 1084 [2022-11-03 01:49:28,483 INFO L226 Difference]: Without dead ends: 821 [2022-11-03 01:49:28,484 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 01:49:28,485 INFO L413 NwaCegarLoop]: 368 mSDtfsCounter, 1813 mSDsluCounter, 2211 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1813 SdHoareTripleChecker+Valid, 2579 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 01:49:28,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1813 Valid, 2579 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 421 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 01:49:28,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 821 states. [2022-11-03 01:49:28,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 821 to 321. [2022-11-03 01:49:28,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 1.428125) internal successors, (457), 320 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:28,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 457 transitions. [2022-11-03 01:49:28,494 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 457 transitions. Word has length 266 [2022-11-03 01:49:28,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:49:28,495 INFO L495 AbstractCegarLoop]: Abstraction has 321 states and 457 transitions. [2022-11-03 01:49:28,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:28,495 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 457 transitions. [2022-11-03 01:49:28,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:49:28,496 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:49:28,497 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] [2022-11-03 01:49:28,527 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-03 01:49:28,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:49:28,710 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:49:28,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:49:28,710 INFO L85 PathProgramCache]: Analyzing trace with hash -334054009, now seen corresponding path program 1 times [2022-11-03 01:49:28,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:49:28,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [445067365] [2022-11-03 01:49:28,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:28,712 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:49:28,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:49:28,713 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:49:28,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-03 01:49:29,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:29,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:49:29,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:49:29,644 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 01:49:29,645 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:49:29,645 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:49:29,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [445067365] [2022-11-03 01:49:29,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [445067365] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:49:29,645 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:49:29,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 01:49:29,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615760913] [2022-11-03 01:49:29,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:49:29,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:49:29,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:49:29,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:49:29,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:49:29,648 INFO L87 Difference]: Start difference. First operand 321 states and 457 transitions. Second operand has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:29,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:49:29,883 INFO L93 Difference]: Finished difference Result 1072 states and 1575 transitions. [2022-11-03 01:49:29,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 01:49:29,884 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 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 266 [2022-11-03 01:49:29,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:49:29,888 INFO L225 Difference]: With dead ends: 1072 [2022-11-03 01:49:29,888 INFO L226 Difference]: Without dead ends: 809 [2022-11-03 01:49:29,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 01:49:29,890 INFO L413 NwaCegarLoop]: 436 mSDtfsCounter, 1781 mSDsluCounter, 2465 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1781 SdHoareTripleChecker+Valid, 2901 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:49:29,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1781 Valid, 2901 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:49:29,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 809 states. [2022-11-03 01:49:29,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 809 to 323. [2022-11-03 01:49:29,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 1.4254658385093169) internal successors, (459), 322 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:29,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 459 transitions. [2022-11-03 01:49:29,900 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 459 transitions. Word has length 266 [2022-11-03 01:49:29,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:49:29,900 INFO L495 AbstractCegarLoop]: Abstraction has 323 states and 459 transitions. [2022-11-03 01:49:29,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:29,901 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 459 transitions. [2022-11-03 01:49:29,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:49:29,902 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:49:29,902 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] [2022-11-03 01:49:29,932 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-03 01:49:30,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:49:30,127 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:49:30,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:49:30,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1054973431, now seen corresponding path program 1 times [2022-11-03 01:49:30,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:49:30,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1924873243] [2022-11-03 01:49:30,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:30,129 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:49:30,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:49:30,129 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:49:30,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-03 01:49:30,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:30,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:49:30,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:49:31,138 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 01:49:31,138 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:49:31,139 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:49:31,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1924873243] [2022-11-03 01:49:31,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1924873243] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:49:31,139 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:49:31,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:49:31,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707826590] [2022-11-03 01:49:31,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:49:31,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:49:31,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:49:31,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:49:31,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:49:31,141 INFO L87 Difference]: Start difference. First operand 323 states and 459 transitions. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:31,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:49:31,335 INFO L93 Difference]: Finished difference Result 1106 states and 1625 transitions. [2022-11-03 01:49:31,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:49:31,337 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 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 266 [2022-11-03 01:49:31,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:49:31,338 INFO L225 Difference]: With dead ends: 1106 [2022-11-03 01:49:31,338 INFO L226 Difference]: Without dead ends: 843 [2022-11-03 01:49:31,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:49:31,339 INFO L413 NwaCegarLoop]: 445 mSDtfsCounter, 1463 mSDsluCounter, 1810 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1463 SdHoareTripleChecker+Valid, 2255 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:49:31,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1463 Valid, 2255 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:49:31,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 843 states. [2022-11-03 01:49:31,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 843 to 327. [2022-11-03 01:49:31,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 1.4233128834355828) internal successors, (464), 326 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:31,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 464 transitions. [2022-11-03 01:49:31,349 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 464 transitions. Word has length 266 [2022-11-03 01:49:31,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:49:31,349 INFO L495 AbstractCegarLoop]: Abstraction has 327 states and 464 transitions. [2022-11-03 01:49:31,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:31,350 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 464 transitions. [2022-11-03 01:49:31,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:49:31,351 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:49:31,352 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] [2022-11-03 01:49:31,376 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2022-11-03 01:49:31,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:49:31,566 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:49:31,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:49:31,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1965070219, now seen corresponding path program 1 times [2022-11-03 01:49:31,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:49:31,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1415120251] [2022-11-03 01:49:31,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:31,568 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:49:31,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:49:31,570 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:49:31,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-03 01:49:32,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:32,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 01:49:32,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:49:32,839 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 01:49:32,839 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:49:32,840 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:49:32,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1415120251] [2022-11-03 01:49:32,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1415120251] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:49:32,841 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:49:32,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:49:32,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913706646] [2022-11-03 01:49:32,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:49:32,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:49:32,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:49:32,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:49:32,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:49:32,843 INFO L87 Difference]: Start difference. First operand 327 states and 464 transitions. Second operand has 4 states, 4 states have (on average 66.5) internal successors, (266), 4 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:33,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:49:33,066 INFO L93 Difference]: Finished difference Result 1051 states and 1544 transitions. [2022-11-03 01:49:33,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:49:33,068 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 66.5) internal successors, (266), 4 states have internal predecessors, (266), 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 266 [2022-11-03 01:49:33,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:49:33,071 INFO L225 Difference]: With dead ends: 1051 [2022-11-03 01:49:33,071 INFO L226 Difference]: Without dead ends: 788 [2022-11-03 01:49:33,071 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:49:33,073 INFO L413 NwaCegarLoop]: 463 mSDtfsCounter, 969 mSDsluCounter, 1039 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 969 SdHoareTripleChecker+Valid, 1502 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:49:33,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [969 Valid, 1502 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:49:33,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2022-11-03 01:49:33,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 337. [2022-11-03 01:49:33,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 1.4226190476190477) internal successors, (478), 336 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:33,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 478 transitions. [2022-11-03 01:49:33,085 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 478 transitions. Word has length 266 [2022-11-03 01:49:33,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:49:33,085 INFO L495 AbstractCegarLoop]: Abstraction has 337 states and 478 transitions. [2022-11-03 01:49:33,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 66.5) internal successors, (266), 4 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:33,086 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 478 transitions. [2022-11-03 01:49:33,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:49:33,087 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:49:33,088 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] [2022-11-03 01:49:33,117 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-11-03 01:49:33,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:49:33,306 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:49:33,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:49:33,306 INFO L85 PathProgramCache]: Analyzing trace with hash -115513459, now seen corresponding path program 1 times [2022-11-03 01:49:33,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:49:33,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1829709655] [2022-11-03 01:49:33,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:33,308 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:49:33,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:49:33,310 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:49:33,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-03 01:49:34,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:34,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 01:49:34,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:49:34,518 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 01:49:34,519 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:49:34,519 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:49:34,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1829709655] [2022-11-03 01:49:34,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1829709655] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:49:34,519 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:49:34,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 01:49:34,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088333607] [2022-11-03 01:49:34,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:49:34,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:49:34,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:49:34,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:49:34,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:49:34,522 INFO L87 Difference]: Start difference. First operand 337 states and 478 transitions. Second operand has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:35,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:49:35,388 INFO L93 Difference]: Finished difference Result 1084 states and 1590 transitions. [2022-11-03 01:49:35,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 01:49:35,389 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 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 266 [2022-11-03 01:49:35,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:49:35,392 INFO L225 Difference]: With dead ends: 1084 [2022-11-03 01:49:35,392 INFO L226 Difference]: Without dead ends: 821 [2022-11-03 01:49:35,393 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 01:49:35,393 INFO L413 NwaCegarLoop]: 391 mSDtfsCounter, 1756 mSDsluCounter, 2132 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1756 SdHoareTripleChecker+Valid, 2523 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 01:49:35,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1756 Valid, 2523 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 01:49:35,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 821 states. [2022-11-03 01:49:35,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 821 to 339. [2022-11-03 01:49:35,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 1.4201183431952662) internal successors, (480), 338 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:35,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 480 transitions. [2022-11-03 01:49:35,403 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 480 transitions. Word has length 266 [2022-11-03 01:49:35,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:49:35,403 INFO L495 AbstractCegarLoop]: Abstraction has 339 states and 480 transitions. [2022-11-03 01:49:35,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:35,404 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 480 transitions. [2022-11-03 01:49:35,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:49:35,405 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:49:35,405 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] [2022-11-03 01:49:35,432 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-11-03 01:49:35,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:49:35,623 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:49:35,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:49:35,623 INFO L85 PathProgramCache]: Analyzing trace with hash -1900916721, now seen corresponding path program 1 times [2022-11-03 01:49:35,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:49:35,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1220035291] [2022-11-03 01:49:35,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:35,625 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:49:35,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:49:35,626 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:49:35,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-03 01:49:36,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:36,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:49:36,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:49:36,603 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 01:49:36,603 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:49:36,603 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:49:36,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1220035291] [2022-11-03 01:49:36,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1220035291] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:49:36,604 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:49:36,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 01:49:36,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326143790] [2022-11-03 01:49:36,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:49:36,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:49:36,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:49:36,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:49:36,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:49:36,606 INFO L87 Difference]: Start difference. First operand 339 states and 480 transitions. Second operand has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:36,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:49:36,825 INFO L93 Difference]: Finished difference Result 1072 states and 1571 transitions. [2022-11-03 01:49:36,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 01:49:36,825 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 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 266 [2022-11-03 01:49:36,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:49:36,827 INFO L225 Difference]: With dead ends: 1072 [2022-11-03 01:49:36,827 INFO L226 Difference]: Without dead ends: 809 [2022-11-03 01:49:36,828 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 01:49:36,834 INFO L413 NwaCegarLoop]: 459 mSDtfsCounter, 1724 mSDsluCounter, 2385 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1724 SdHoareTripleChecker+Valid, 2844 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:49:36,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1724 Valid, 2844 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:49:36,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 809 states. [2022-11-03 01:49:36,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 809 to 341. [2022-11-03 01:49:36,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 1.4176470588235295) internal successors, (482), 340 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:36,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 482 transitions. [2022-11-03 01:49:36,843 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 482 transitions. Word has length 266 [2022-11-03 01:49:36,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:49:36,844 INFO L495 AbstractCegarLoop]: Abstraction has 341 states and 482 transitions. [2022-11-03 01:49:36,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:36,844 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 482 transitions. [2022-11-03 01:49:36,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:49:36,846 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:49:36,846 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] [2022-11-03 01:49:36,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-11-03 01:49:37,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:49:37,071 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:49:37,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:49:37,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1777635055, now seen corresponding path program 1 times [2022-11-03 01:49:37,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:49:37,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [947301618] [2022-11-03 01:49:37,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:37,073 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:49:37,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:49:37,074 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:49:37,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-03 01:49:37,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:37,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:49:37,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:49:38,123 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 01:49:38,124 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:49:38,124 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:49:38,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [947301618] [2022-11-03 01:49:38,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [947301618] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:49:38,124 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:49:38,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:49:38,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437847329] [2022-11-03 01:49:38,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:49:38,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:49:38,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:49:38,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:49:38,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:49:38,126 INFO L87 Difference]: Start difference. First operand 341 states and 482 transitions. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:38,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:49:38,348 INFO L93 Difference]: Finished difference Result 1124 states and 1648 transitions. [2022-11-03 01:49:38,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:49:38,349 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 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 266 [2022-11-03 01:49:38,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:49:38,351 INFO L225 Difference]: With dead ends: 1124 [2022-11-03 01:49:38,351 INFO L226 Difference]: Without dead ends: 861 [2022-11-03 01:49:38,352 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:49:38,352 INFO L413 NwaCegarLoop]: 464 mSDtfsCounter, 1446 mSDsluCounter, 1783 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1446 SdHoareTripleChecker+Valid, 2247 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:49:38,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1446 Valid, 2247 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:49:38,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2022-11-03 01:49:38,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 343. [2022-11-03 01:49:38,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 342 states have (on average 1.4152046783625731) internal successors, (484), 342 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:38,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 484 transitions. [2022-11-03 01:49:38,359 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 484 transitions. Word has length 266 [2022-11-03 01:49:38,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:49:38,360 INFO L495 AbstractCegarLoop]: Abstraction has 343 states and 484 transitions. [2022-11-03 01:49:38,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:38,360 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 484 transitions. [2022-11-03 01:49:38,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:49:38,362 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:49:38,362 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] [2022-11-03 01:49:38,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-11-03 01:49:38,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:49:38,578 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:49:38,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:49:38,578 INFO L85 PathProgramCache]: Analyzing trace with hash -874714477, now seen corresponding path program 1 times [2022-11-03 01:49:38,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:49:38,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [541026548] [2022-11-03 01:49:38,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:38,580 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:49:38,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:49:38,582 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:49:38,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-03 01:49:39,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:39,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 01:49:39,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:49:39,867 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 01:49:39,867 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:49:39,867 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:49:39,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [541026548] [2022-11-03 01:49:39,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [541026548] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:49:39,868 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:49:39,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:49:39,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965348525] [2022-11-03 01:49:39,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:49:39,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:49:39,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:49:39,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:49:39,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:49:39,870 INFO L87 Difference]: Start difference. First operand 343 states and 484 transitions. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:40,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:49:40,116 INFO L93 Difference]: Finished difference Result 1124 states and 1647 transitions. [2022-11-03 01:49:40,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:49:40,117 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 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 266 [2022-11-03 01:49:40,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:49:40,119 INFO L225 Difference]: With dead ends: 1124 [2022-11-03 01:49:40,119 INFO L226 Difference]: Without dead ends: 861 [2022-11-03 01:49:40,119 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:49:40,120 INFO L413 NwaCegarLoop]: 469 mSDtfsCounter, 1438 mSDsluCounter, 1785 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1438 SdHoareTripleChecker+Valid, 2254 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:49:40,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1438 Valid, 2254 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:49:40,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2022-11-03 01:49:40,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 345. [2022-11-03 01:49:40,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 1.4127906976744187) internal successors, (486), 344 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:40,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 486 transitions. [2022-11-03 01:49:40,129 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 486 transitions. Word has length 266 [2022-11-03 01:49:40,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:49:40,129 INFO L495 AbstractCegarLoop]: Abstraction has 345 states and 486 transitions. [2022-11-03 01:49:40,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:40,130 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 486 transitions. [2022-11-03 01:49:40,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:49:40,131 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:49:40,131 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] [2022-11-03 01:49:40,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-11-03 01:49:40,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:49:40,338 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:49:40,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:49:40,338 INFO L85 PathProgramCache]: Analyzing trace with hash -882713451, now seen corresponding path program 1 times [2022-11-03 01:49:40,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:49:40,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [345084379] [2022-11-03 01:49:40,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:40,340 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:49:40,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:49:40,341 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:49:40,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-11-03 01:49:41,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:41,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:49:41,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:49:41,336 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 01:49:41,337 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:49:41,337 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:49:41,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [345084379] [2022-11-03 01:49:41,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [345084379] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:49:41,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:49:41,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 01:49:41,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11850078] [2022-11-03 01:49:41,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:49:41,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:49:41,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:49:41,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:49:41,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:49:41,340 INFO L87 Difference]: Start difference. First operand 345 states and 486 transitions. Second operand has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:41,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:49:41,567 INFO L93 Difference]: Finished difference Result 1072 states and 1568 transitions. [2022-11-03 01:49:41,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 01:49:41,568 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 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 266 [2022-11-03 01:49:41,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:49:41,570 INFO L225 Difference]: With dead ends: 1072 [2022-11-03 01:49:41,570 INFO L226 Difference]: Without dead ends: 809 [2022-11-03 01:49:41,571 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 01:49:41,572 INFO L413 NwaCegarLoop]: 471 mSDtfsCounter, 1690 mSDsluCounter, 2340 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1690 SdHoareTripleChecker+Valid, 2811 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:49:41,572 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1690 Valid, 2811 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:49:41,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 809 states. [2022-11-03 01:49:41,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 809 to 351. [2022-11-03 01:49:41,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 1.4114285714285715) internal successors, (494), 350 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:41,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 494 transitions. [2022-11-03 01:49:41,580 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 494 transitions. Word has length 266 [2022-11-03 01:49:41,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:49:41,581 INFO L495 AbstractCegarLoop]: Abstraction has 351 states and 494 transitions. [2022-11-03 01:49:41,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:41,581 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 494 transitions. [2022-11-03 01:49:41,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:49:41,582 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:49:41,583 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] [2022-11-03 01:49:41,612 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-11-03 01:49:41,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:49:41,798 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:49:41,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:49:41,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1698760681, now seen corresponding path program 1 times [2022-11-03 01:49:41,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:49:41,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1364426759] [2022-11-03 01:49:41,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:41,801 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:49:41,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:49:41,803 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:49:41,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-11-03 01:49:42,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:42,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:49:42,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:49:43,044 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 01:49:43,044 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:49:43,045 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:49:43,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1364426759] [2022-11-03 01:49:43,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1364426759] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:49:43,045 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:49:43,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:49:43,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146993714] [2022-11-03 01:49:43,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:49:43,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:49:43,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:49:43,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:49:43,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:49:43,047 INFO L87 Difference]: Start difference. First operand 351 states and 494 transitions. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:43,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:49:43,272 INFO L93 Difference]: Finished difference Result 1132 states and 1657 transitions. [2022-11-03 01:49:43,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:49:43,274 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 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 266 [2022-11-03 01:49:43,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:49:43,278 INFO L225 Difference]: With dead ends: 1132 [2022-11-03 01:49:43,278 INFO L226 Difference]: Without dead ends: 869 [2022-11-03 01:49:43,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:49:43,279 INFO L413 NwaCegarLoop]: 476 mSDtfsCounter, 1431 mSDsluCounter, 1764 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1431 SdHoareTripleChecker+Valid, 2240 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:49:43,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1431 Valid, 2240 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:49:43,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 869 states. [2022-11-03 01:49:43,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 869 to 353. [2022-11-03 01:49:43,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 1.4090909090909092) internal successors, (496), 352 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:43,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 496 transitions. [2022-11-03 01:49:43,288 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 496 transitions. Word has length 266 [2022-11-03 01:49:43,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:49:43,288 INFO L495 AbstractCegarLoop]: Abstraction has 353 states and 496 transitions. [2022-11-03 01:49:43,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:43,288 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 496 transitions. [2022-11-03 01:49:43,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:49:43,290 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:49:43,290 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] [2022-11-03 01:49:43,313 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (31)] Ended with exit code 0 [2022-11-03 01:49:43,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:49:43,506 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:49:43,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:49:43,506 INFO L85 PathProgramCache]: Analyzing trace with hash -99611623, now seen corresponding path program 1 times [2022-11-03 01:49:43,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:49:43,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [511164308] [2022-11-03 01:49:43,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:43,508 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:49:43,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:49:43,509 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:49:43,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-11-03 01:49:44,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:44,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 01:49:44,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:49:44,728 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 01:49:44,728 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:49:44,729 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:49:44,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [511164308] [2022-11-03 01:49:44,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [511164308] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:49:44,729 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:49:44,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:49:44,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352089954] [2022-11-03 01:49:44,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:49:44,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:49:44,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:49:44,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:49:44,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:49:44,731 INFO L87 Difference]: Start difference. First operand 353 states and 496 transitions. Second operand has 4 states, 4 states have (on average 66.5) internal successors, (266), 4 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:44,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:49:44,931 INFO L93 Difference]: Finished difference Result 1051 states and 1537 transitions. [2022-11-03 01:49:44,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:49:44,933 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 66.5) internal successors, (266), 4 states have internal predecessors, (266), 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 266 [2022-11-03 01:49:44,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:49:44,935 INFO L225 Difference]: With dead ends: 1051 [2022-11-03 01:49:44,935 INFO L226 Difference]: Without dead ends: 788 [2022-11-03 01:49:44,936 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:49:44,937 INFO L413 NwaCegarLoop]: 483 mSDtfsCounter, 917 mSDsluCounter, 1012 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 917 SdHoareTripleChecker+Valid, 1495 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:49:44,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [917 Valid, 1495 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:49:44,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2022-11-03 01:49:44,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 355. [2022-11-03 01:49:44,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 1.4067796610169492) internal successors, (498), 354 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:44,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 498 transitions. [2022-11-03 01:49:44,946 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 498 transitions. Word has length 266 [2022-11-03 01:49:44,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:49:44,946 INFO L495 AbstractCegarLoop]: Abstraction has 355 states and 498 transitions. [2022-11-03 01:49:44,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 66.5) internal successors, (266), 4 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:44,947 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 498 transitions. [2022-11-03 01:49:44,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:49:44,948 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:49:44,949 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] [2022-11-03 01:49:44,971 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (32)] Ended with exit code 0 [2022-11-03 01:49:45,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:49:45,170 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:49:45,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:49:45,170 INFO L85 PathProgramCache]: Analyzing trace with hash -80070501, now seen corresponding path program 1 times [2022-11-03 01:49:45,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:49:45,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1528397732] [2022-11-03 01:49:45,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:45,172 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:49:45,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:49:45,173 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:49:45,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-11-03 01:49:45,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:45,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:49:45,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:49:46,092 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 01:49:46,092 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:49:46,092 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:49:46,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1528397732] [2022-11-03 01:49:46,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1528397732] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:49:46,093 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:49:46,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 01:49:46,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572932303] [2022-11-03 01:49:46,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:49:46,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:49:46,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:49:46,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:49:46,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:49:46,095 INFO L87 Difference]: Start difference. First operand 355 states and 498 transitions. Second operand has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:46,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:49:46,323 INFO L93 Difference]: Finished difference Result 1072 states and 1565 transitions. [2022-11-03 01:49:46,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 01:49:46,323 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 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 266 [2022-11-03 01:49:46,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:49:46,325 INFO L225 Difference]: With dead ends: 1072 [2022-11-03 01:49:46,326 INFO L226 Difference]: Without dead ends: 809 [2022-11-03 01:49:46,326 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 01:49:46,327 INFO L413 NwaCegarLoop]: 477 mSDtfsCounter, 1666 mSDsluCounter, 2313 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1666 SdHoareTripleChecker+Valid, 2790 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:49:46,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1666 Valid, 2790 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:49:46,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 809 states. [2022-11-03 01:49:46,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 809 to 357. [2022-11-03 01:49:46,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 1.404494382022472) internal successors, (500), 356 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:46,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 500 transitions. [2022-11-03 01:49:46,335 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 500 transitions. Word has length 266 [2022-11-03 01:49:46,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:49:46,336 INFO L495 AbstractCegarLoop]: Abstraction has 357 states and 500 transitions. [2022-11-03 01:49:46,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:46,336 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 500 transitions. [2022-11-03 01:49:46,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:49:46,338 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:49:46,338 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] [2022-11-03 01:49:46,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-11-03 01:49:46,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:49:46,554 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:49:46,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:49:46,555 INFO L85 PathProgramCache]: Analyzing trace with hash 447323549, now seen corresponding path program 1 times [2022-11-03 01:49:46,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:49:46,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [583628877] [2022-11-03 01:49:46,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:46,557 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:49:46,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:49:46,558 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:49:46,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-11-03 01:49:47,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:47,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:49:47,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:49:47,688 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 01:49:47,689 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:49:47,689 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:49:47,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [583628877] [2022-11-03 01:49:47,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [583628877] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:49:47,689 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:49:47,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:49:47,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805793922] [2022-11-03 01:49:47,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:49:47,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:49:47,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:49:47,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:49:47,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:49:47,691 INFO L87 Difference]: Start difference. First operand 357 states and 500 transitions. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:47,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:49:47,908 INFO L93 Difference]: Finished difference Result 1142 states and 1669 transitions. [2022-11-03 01:49:47,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:49:47,909 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 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 266 [2022-11-03 01:49:47,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:49:47,911 INFO L225 Difference]: With dead ends: 1142 [2022-11-03 01:49:47,911 INFO L226 Difference]: Without dead ends: 879 [2022-11-03 01:49:47,912 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:49:47,912 INFO L413 NwaCegarLoop]: 482 mSDtfsCounter, 1428 mSDsluCounter, 1760 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1428 SdHoareTripleChecker+Valid, 2242 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:49:47,913 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1428 Valid, 2242 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:49:47,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2022-11-03 01:49:47,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 359. [2022-11-03 01:49:47,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 358 states have (on average 1.4022346368715084) internal successors, (502), 358 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:47,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 502 transitions. [2022-11-03 01:49:47,922 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 502 transitions. Word has length 266 [2022-11-03 01:49:47,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:49:47,922 INFO L495 AbstractCegarLoop]: Abstraction has 359 states and 502 transitions. [2022-11-03 01:49:47,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:47,922 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 502 transitions. [2022-11-03 01:49:47,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:49:47,924 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:49:47,924 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] [2022-11-03 01:49:47,943 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (34)] Ended with exit code 0 [2022-11-03 01:49:48,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:49:48,126 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:49:48,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:49:48,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1095916319, now seen corresponding path program 1 times [2022-11-03 01:49:48,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:49:48,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1012065426] [2022-11-03 01:49:48,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:48,128 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:49:48,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:49:48,129 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:49:48,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-11-03 01:49:48,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:48,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:49:48,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:49:49,150 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 01:49:49,150 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:49:49,150 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:49:49,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1012065426] [2022-11-03 01:49:49,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1012065426] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:49:49,151 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:49:49,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 01:49:49,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000924444] [2022-11-03 01:49:49,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:49:49,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:49:49,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:49:49,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:49:49,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:49:49,153 INFO L87 Difference]: Start difference. First operand 359 states and 502 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:50,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:49:50,028 INFO L93 Difference]: Finished difference Result 1712 states and 2514 transitions. [2022-11-03 01:49:50,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-03 01:49:50,028 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 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 266 [2022-11-03 01:49:50,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:49:50,031 INFO L225 Difference]: With dead ends: 1712 [2022-11-03 01:49:50,031 INFO L226 Difference]: Without dead ends: 1449 [2022-11-03 01:49:50,033 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=189, Invalid=461, Unknown=0, NotChecked=0, Total=650 [2022-11-03 01:49:50,033 INFO L413 NwaCegarLoop]: 498 mSDtfsCounter, 3844 mSDsluCounter, 5116 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3844 SdHoareTripleChecker+Valid, 5614 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:49:50,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3844 Valid, 5614 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 01:49:50,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1449 states. [2022-11-03 01:49:50,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1449 to 377. [2022-11-03 01:49:50,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 376 states have (on average 1.4042553191489362) internal successors, (528), 376 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:50,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 528 transitions. [2022-11-03 01:49:50,046 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 528 transitions. Word has length 266 [2022-11-03 01:49:50,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:49:50,047 INFO L495 AbstractCegarLoop]: Abstraction has 377 states and 528 transitions. [2022-11-03 01:49:50,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:50,047 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 528 transitions. [2022-11-03 01:49:50,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:49:50,048 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:49:50,049 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] [2022-11-03 01:49:50,078 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2022-11-03 01:49:50,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:49:50,262 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:49:50,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:49:50,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1185976609, now seen corresponding path program 1 times [2022-11-03 01:49:50,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:49:50,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [371943807] [2022-11-03 01:49:50,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:50,264 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:49:50,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:49:50,266 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:49:50,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-11-03 01:49:51,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:51,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 01:49:51,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:49:51,645 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 01:49:51,645 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:49:51,645 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:49:51,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [371943807] [2022-11-03 01:49:51,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [371943807] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:49:51,646 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:49:51,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:49:51,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119316803] [2022-11-03 01:49:51,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:49:51,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:49:51,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:49:51,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:49:51,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:49:51,647 INFO L87 Difference]: Start difference. First operand 377 states and 528 transitions. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:51,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:49:51,923 INFO L93 Difference]: Finished difference Result 1207 states and 1761 transitions. [2022-11-03 01:49:51,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:49:51,924 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 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 266 [2022-11-03 01:49:51,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:49:51,926 INFO L225 Difference]: With dead ends: 1207 [2022-11-03 01:49:51,926 INFO L226 Difference]: Without dead ends: 926 [2022-11-03 01:49:51,927 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:49:51,927 INFO L413 NwaCegarLoop]: 489 mSDtfsCounter, 1414 mSDsluCounter, 1757 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1414 SdHoareTripleChecker+Valid, 2246 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:49:51,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1414 Valid, 2246 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:49:51,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2022-11-03 01:49:51,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 381. [2022-11-03 01:49:51,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 380 states have (on average 1.4) internal successors, (532), 380 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:51,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 532 transitions. [2022-11-03 01:49:51,938 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 532 transitions. Word has length 266 [2022-11-03 01:49:51,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:49:51,938 INFO L495 AbstractCegarLoop]: Abstraction has 381 states and 532 transitions. [2022-11-03 01:49:51,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:51,939 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 532 transitions. [2022-11-03 01:49:51,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:49:51,940 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:49:51,940 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] [2022-11-03 01:49:51,970 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-11-03 01:49:52,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:49:52,158 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:49:52,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:49:52,158 INFO L85 PathProgramCache]: Analyzing trace with hash -221749341, now seen corresponding path program 1 times [2022-11-03 01:49:52,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:49:52,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1953284799] [2022-11-03 01:49:52,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:52,160 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:49:52,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:49:52,162 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:49:52,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-11-03 01:49:52,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:52,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:49:52,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:49:53,184 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 01:49:53,184 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:49:53,184 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:49:53,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1953284799] [2022-11-03 01:49:53,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1953284799] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:49:53,184 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:49:53,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 01:49:53,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21713642] [2022-11-03 01:49:53,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:49:53,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:49:53,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:49:53,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:49:53,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:49:53,186 INFO L87 Difference]: Start difference. First operand 381 states and 532 transitions. Second operand has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:53,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:49:53,412 INFO L93 Difference]: Finished difference Result 1126 states and 1639 transitions. [2022-11-03 01:49:53,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 01:49:53,412 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 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 266 [2022-11-03 01:49:53,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:49:53,414 INFO L225 Difference]: With dead ends: 1126 [2022-11-03 01:49:53,414 INFO L226 Difference]: Without dead ends: 845 [2022-11-03 01:49:53,415 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 01:49:53,416 INFO L413 NwaCegarLoop]: 485 mSDtfsCounter, 1634 mSDsluCounter, 2277 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1634 SdHoareTripleChecker+Valid, 2762 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:49:53,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1634 Valid, 2762 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:49:53,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845 states. [2022-11-03 01:49:53,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845 to 383. [2022-11-03 01:49:53,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 382 states have (on average 1.3979057591623036) internal successors, (534), 382 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:53,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 534 transitions. [2022-11-03 01:49:53,426 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 534 transitions. Word has length 266 [2022-11-03 01:49:53,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:49:53,427 INFO L495 AbstractCegarLoop]: Abstraction has 383 states and 534 transitions. [2022-11-03 01:49:53,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:53,427 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 534 transitions. [2022-11-03 01:49:53,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:49:53,428 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:49:53,429 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] [2022-11-03 01:49:53,448 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2022-11-03 01:49:53,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:49:53,634 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:49:53,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:49:53,635 INFO L85 PathProgramCache]: Analyzing trace with hash -2144999771, now seen corresponding path program 1 times [2022-11-03 01:49:53,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:49:53,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1442174475] [2022-11-03 01:49:53,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:53,636 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:49:53,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:49:53,637 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:49:53,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-11-03 01:49:54,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:54,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:49:54,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:49:54,655 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 01:49:54,656 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:49:54,656 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:49:54,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1442174475] [2022-11-03 01:49:54,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1442174475] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:49:54,656 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:49:54,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 01:49:54,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821876287] [2022-11-03 01:49:54,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:49:54,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:49:54,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:49:54,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:49:54,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:49:54,658 INFO L87 Difference]: Start difference. First operand 383 states and 534 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:55,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:49:55,377 INFO L93 Difference]: Finished difference Result 1744 states and 2556 transitions. [2022-11-03 01:49:55,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-03 01:49:55,377 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 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 266 [2022-11-03 01:49:55,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:49:55,380 INFO L225 Difference]: With dead ends: 1744 [2022-11-03 01:49:55,380 INFO L226 Difference]: Without dead ends: 1463 [2022-11-03 01:49:55,381 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=189, Invalid=461, Unknown=0, NotChecked=0, Total=650 [2022-11-03 01:49:55,381 INFO L413 NwaCegarLoop]: 520 mSDtfsCounter, 3864 mSDsluCounter, 5122 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3864 SdHoareTripleChecker+Valid, 5642 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:49:55,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3864 Valid, 5642 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 01:49:55,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1463 states. [2022-11-03 01:49:55,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1463 to 391. [2022-11-03 01:49:55,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 1.3974358974358974) internal successors, (545), 390 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:55,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 545 transitions. [2022-11-03 01:49:55,394 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 545 transitions. Word has length 266 [2022-11-03 01:49:55,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:49:55,394 INFO L495 AbstractCegarLoop]: Abstraction has 391 states and 545 transitions. [2022-11-03 01:49:55,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:55,395 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 545 transitions. [2022-11-03 01:49:55,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:49:55,396 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:49:55,397 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] [2022-11-03 01:49:55,422 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2022-11-03 01:49:55,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:49:55,618 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:49:55,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:49:55,619 INFO L85 PathProgramCache]: Analyzing trace with hash -741130585, now seen corresponding path program 1 times [2022-11-03 01:49:55,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:49:55,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2139981802] [2022-11-03 01:49:55,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:55,621 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:49:55,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:49:55,622 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:49:55,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-11-03 01:49:56,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:56,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 01:49:56,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:49:56,869 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 01:49:56,869 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:49:56,870 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:49:56,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2139981802] [2022-11-03 01:49:56,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2139981802] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:49:56,870 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:49:56,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:49:56,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592519489] [2022-11-03 01:49:56,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:49:56,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:49:56,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:49:56,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:49:56,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:49:56,872 INFO L87 Difference]: Start difference. First operand 391 states and 545 transitions. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:57,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:49:57,107 INFO L93 Difference]: Finished difference Result 1202 states and 1748 transitions. [2022-11-03 01:49:57,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:49:57,108 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 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 266 [2022-11-03 01:49:57,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:49:57,109 INFO L225 Difference]: With dead ends: 1202 [2022-11-03 01:49:57,109 INFO L226 Difference]: Without dead ends: 913 [2022-11-03 01:49:57,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:49:57,110 INFO L413 NwaCegarLoop]: 499 mSDtfsCounter, 1354 mSDsluCounter, 1710 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1354 SdHoareTripleChecker+Valid, 2209 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:49:57,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1354 Valid, 2209 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:49:57,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 913 states. [2022-11-03 01:49:57,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 913 to 397. [2022-11-03 01:49:57,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 1.393939393939394) internal successors, (552), 396 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:57,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 552 transitions. [2022-11-03 01:49:57,120 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 552 transitions. Word has length 266 [2022-11-03 01:49:57,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:49:57,121 INFO L495 AbstractCegarLoop]: Abstraction has 397 states and 552 transitions. [2022-11-03 01:49:57,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:57,121 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 552 transitions. [2022-11-03 01:49:57,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:49:57,123 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:49:57,123 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] [2022-11-03 01:49:57,144 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (39)] Ended with exit code 0 [2022-11-03 01:49:57,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:49:57,338 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:49:57,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:49:57,339 INFO L85 PathProgramCache]: Analyzing trace with hash -73748695, now seen corresponding path program 1 times [2022-11-03 01:49:57,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:49:57,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [697025310] [2022-11-03 01:49:57,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:57,340 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:49:57,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:49:57,341 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:49:57,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-11-03 01:49:58,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:58,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 01:49:58,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:49:58,475 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 01:49:58,476 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:49:58,476 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:49:58,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [697025310] [2022-11-03 01:49:58,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [697025310] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:49:58,476 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:49:58,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 01:49:58,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494383849] [2022-11-03 01:49:58,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:49:58,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:49:58,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:49:58,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:49:58,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:49:58,480 INFO L87 Difference]: Start difference. First operand 397 states and 552 transitions. Second operand has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:59,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:49:59,299 INFO L93 Difference]: Finished difference Result 1162 states and 1687 transitions. [2022-11-03 01:49:59,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 01:49:59,299 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 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 266 [2022-11-03 01:49:59,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:49:59,301 INFO L225 Difference]: With dead ends: 1162 [2022-11-03 01:49:59,301 INFO L226 Difference]: Without dead ends: 873 [2022-11-03 01:49:59,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 01:49:59,303 INFO L413 NwaCegarLoop]: 428 mSDtfsCounter, 1629 mSDsluCounter, 1983 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1629 SdHoareTripleChecker+Valid, 2411 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 01:49:59,303 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1629 Valid, 2411 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 01:49:59,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 873 states. [2022-11-03 01:49:59,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 873 to 399. [2022-11-03 01:49:59,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 398 states have (on average 1.3919597989949748) internal successors, (554), 398 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:59,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 554 transitions. [2022-11-03 01:49:59,314 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 554 transitions. Word has length 266 [2022-11-03 01:49:59,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:49:59,314 INFO L495 AbstractCegarLoop]: Abstraction has 399 states and 554 transitions. [2022-11-03 01:49:59,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:59,315 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 554 transitions. [2022-11-03 01:49:59,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:49:59,316 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:49:59,316 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] [2022-11-03 01:49:59,345 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2022-11-03 01:49:59,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:49:59,538 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:49:59,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:49:59,538 INFO L85 PathProgramCache]: Analyzing trace with hash 271079467, now seen corresponding path program 1 times [2022-11-03 01:49:59,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:49:59,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [204823036] [2022-11-03 01:49:59,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:59,540 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:49:59,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:49:59,541 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:49:59,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-11-03 01:50:00,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:50:00,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:50:00,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:50:00,520 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 01:50:00,520 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:50:00,520 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:50:00,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [204823036] [2022-11-03 01:50:00,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [204823036] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:50:00,521 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:50:00,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 01:50:00,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178485960] [2022-11-03 01:50:00,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:50:00,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:50:00,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:50:00,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:50:00,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:50:00,523 INFO L87 Difference]: Start difference. First operand 399 states and 554 transitions. Second operand has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:00,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:50:00,743 INFO L93 Difference]: Finished difference Result 1150 states and 1668 transitions. [2022-11-03 01:50:00,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 01:50:00,745 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 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 266 [2022-11-03 01:50:00,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:50:00,747 INFO L225 Difference]: With dead ends: 1150 [2022-11-03 01:50:00,747 INFO L226 Difference]: Without dead ends: 861 [2022-11-03 01:50:00,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 01:50:00,748 INFO L413 NwaCegarLoop]: 496 mSDtfsCounter, 1597 mSDsluCounter, 2232 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1597 SdHoareTripleChecker+Valid, 2728 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:50:00,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1597 Valid, 2728 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:50:00,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2022-11-03 01:50:00,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 401. [2022-11-03 01:50:00,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 1.39) internal successors, (556), 400 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:00,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 556 transitions. [2022-11-03 01:50:00,758 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 556 transitions. Word has length 266 [2022-11-03 01:50:00,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:50:00,759 INFO L495 AbstractCegarLoop]: Abstraction has 401 states and 556 transitions. [2022-11-03 01:50:00,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:00,759 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 556 transitions. [2022-11-03 01:50:00,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:50:00,761 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:50:00,761 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] [2022-11-03 01:50:00,785 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2022-11-03 01:50:00,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:50:00,976 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:50:00,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:50:00,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1498392147, now seen corresponding path program 1 times [2022-11-03 01:50:00,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:50:00,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [113573418] [2022-11-03 01:50:00,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:50:00,978 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:50:00,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:50:00,980 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:50:01,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-11-03 01:50:01,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:50:01,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:50:01,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:50:02,183 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 01:50:02,184 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:50:02,184 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:50:02,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [113573418] [2022-11-03 01:50:02,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [113573418] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:50:02,184 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:50:02,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:50:02,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223875681] [2022-11-03 01:50:02,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:50:02,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:50:02,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:50:02,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:50:02,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:50:02,186 INFO L87 Difference]: Start difference. First operand 401 states and 556 transitions. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:02,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:50:02,393 INFO L93 Difference]: Finished difference Result 1262 states and 1833 transitions. [2022-11-03 01:50:02,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:50:02,394 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 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 266 [2022-11-03 01:50:02,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:50:02,395 INFO L225 Difference]: With dead ends: 1262 [2022-11-03 01:50:02,395 INFO L226 Difference]: Without dead ends: 973 [2022-11-03 01:50:02,396 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:50:02,396 INFO L413 NwaCegarLoop]: 501 mSDtfsCounter, 1398 mSDsluCounter, 1728 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1398 SdHoareTripleChecker+Valid, 2229 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:50:02,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1398 Valid, 2229 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:50:02,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2022-11-03 01:50:02,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 403. [2022-11-03 01:50:02,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 1.3880597014925373) internal successors, (558), 402 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:02,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 558 transitions. [2022-11-03 01:50:02,405 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 558 transitions. Word has length 266 [2022-11-03 01:50:02,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:50:02,406 INFO L495 AbstractCegarLoop]: Abstraction has 403 states and 558 transitions. [2022-11-03 01:50:02,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:02,406 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 558 transitions. [2022-11-03 01:50:02,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:50:02,408 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:50:02,408 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] [2022-11-03 01:50:02,428 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (42)] Ended with exit code 0 [2022-11-03 01:50:02,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:50:02,618 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:50:02,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:50:02,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1391383471, now seen corresponding path program 1 times [2022-11-03 01:50:02,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:50:02,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1247980575] [2022-11-03 01:50:02,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:50:02,620 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:50:02,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:50:02,621 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:50:02,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-11-03 01:50:03,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:50:03,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 01:50:03,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:50:03,838 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 01:50:03,838 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:50:03,839 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:50:03,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1247980575] [2022-11-03 01:50:03,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1247980575] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:50:03,839 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:50:03,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 01:50:03,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906653636] [2022-11-03 01:50:03,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:50:03,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:50:03,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:50:03,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:50:03,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:50:03,841 INFO L87 Difference]: Start difference. First operand 403 states and 558 transitions. Second operand has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:04,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:50:04,153 INFO L93 Difference]: Finished difference Result 1211 states and 1757 transitions. [2022-11-03 01:50:04,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 01:50:04,155 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 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 266 [2022-11-03 01:50:04,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:50:04,157 INFO L225 Difference]: With dead ends: 1211 [2022-11-03 01:50:04,157 INFO L226 Difference]: Without dead ends: 922 [2022-11-03 01:50:04,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 01:50:04,159 INFO L413 NwaCegarLoop]: 505 mSDtfsCounter, 1713 mSDsluCounter, 2405 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1713 SdHoareTripleChecker+Valid, 2910 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:50:04,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1713 Valid, 2910 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:50:04,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 922 states. [2022-11-03 01:50:04,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 922 to 405. [2022-11-03 01:50:04,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 1.386138613861386) internal successors, (560), 404 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:04,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 560 transitions. [2022-11-03 01:50:04,169 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 560 transitions. Word has length 266 [2022-11-03 01:50:04,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:50:04,169 INFO L495 AbstractCegarLoop]: Abstraction has 405 states and 560 transitions. [2022-11-03 01:50:04,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:04,169 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 560 transitions. [2022-11-03 01:50:04,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:50:04,171 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:50:04,171 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] [2022-11-03 01:50:04,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2022-11-03 01:50:04,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:50:04,400 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:50:04,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:50:04,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1457002959, now seen corresponding path program 1 times [2022-11-03 01:50:04,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:50:04,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [751012925] [2022-11-03 01:50:04,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:50:04,401 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:50:04,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:50:04,402 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:50:04,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-11-03 01:50:05,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:50:05,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 01:50:05,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:50:05,458 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 01:50:05,458 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:50:05,458 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:50:05,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [751012925] [2022-11-03 01:50:05,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [751012925] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:50:05,459 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:50:05,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 01:50:05,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222143909] [2022-11-03 01:50:05,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:50:05,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:50:05,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:50:05,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:50:05,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:50:05,461 INFO L87 Difference]: Start difference. First operand 405 states and 560 transitions. Second operand has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:05,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:50:05,771 INFO L93 Difference]: Finished difference Result 984 states and 1419 transitions. [2022-11-03 01:50:05,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 01:50:05,773 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 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 266 [2022-11-03 01:50:05,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:50:05,773 INFO L225 Difference]: With dead ends: 984 [2022-11-03 01:50:05,773 INFO L226 Difference]: Without dead ends: 695 [2022-11-03 01:50:05,774 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 01:50:05,774 INFO L413 NwaCegarLoop]: 504 mSDtfsCounter, 1346 mSDsluCounter, 1519 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1346 SdHoareTripleChecker+Valid, 2023 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:50:05,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1346 Valid, 2023 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:50:05,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 695 states. [2022-11-03 01:50:05,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 695 to 407. [2022-11-03 01:50:05,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 1.3842364532019704) internal successors, (562), 406 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:05,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 562 transitions. [2022-11-03 01:50:05,784 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 562 transitions. Word has length 266 [2022-11-03 01:50:05,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:50:05,784 INFO L495 AbstractCegarLoop]: Abstraction has 407 states and 562 transitions. [2022-11-03 01:50:05,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:05,784 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 562 transitions. [2022-11-03 01:50:05,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:50:05,786 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:50:05,786 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] [2022-11-03 01:50:05,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2022-11-03 01:50:06,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:50:06,008 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:50:06,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:50:06,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1842865361, now seen corresponding path program 1 times [2022-11-03 01:50:06,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:50:06,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1573038202] [2022-11-03 01:50:06,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:50:06,011 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:50:06,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:50:06,012 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:50:06,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-11-03 01:50:06,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:50:06,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 01:50:06,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:50:07,148 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 01:50:07,148 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:50:07,148 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:50:07,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1573038202] [2022-11-03 01:50:07,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1573038202] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:50:07,148 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:50:07,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 01:50:07,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723351860] [2022-11-03 01:50:07,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:50:07,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:50:07,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:50:07,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:50:07,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:50:07,151 INFO L87 Difference]: Start difference. First operand 407 states and 562 transitions. Second operand has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:07,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:50:07,997 INFO L93 Difference]: Finished difference Result 1162 states and 1682 transitions. [2022-11-03 01:50:07,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 01:50:07,998 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 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 266 [2022-11-03 01:50:07,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:50:07,999 INFO L225 Difference]: With dead ends: 1162 [2022-11-03 01:50:07,999 INFO L226 Difference]: Without dead ends: 873 [2022-11-03 01:50:08,000 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 01:50:08,000 INFO L413 NwaCegarLoop]: 438 mSDtfsCounter, 1589 mSDsluCounter, 1939 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1589 SdHoareTripleChecker+Valid, 2377 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 01:50:08,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1589 Valid, 2377 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 01:50:08,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 873 states. [2022-11-03 01:50:08,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 873 to 409. [2022-11-03 01:50:08,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 1.3823529411764706) internal successors, (564), 408 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:08,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 564 transitions. [2022-11-03 01:50:08,010 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 564 transitions. Word has length 266 [2022-11-03 01:50:08,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:50:08,011 INFO L495 AbstractCegarLoop]: Abstraction has 409 states and 564 transitions. [2022-11-03 01:50:08,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:08,011 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 564 transitions. [2022-11-03 01:50:08,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:50:08,012 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:50:08,013 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] [2022-11-03 01:50:08,037 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (45)] Ended with exit code 0 [2022-11-03 01:50:08,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:50:08,226 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:50:08,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:50:08,227 INFO L85 PathProgramCache]: Analyzing trace with hash 88260273, now seen corresponding path program 1 times [2022-11-03 01:50:08,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:50:08,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [395795363] [2022-11-03 01:50:08,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:50:08,228 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:50:08,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:50:08,229 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:50:08,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-11-03 01:50:08,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:50:08,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:50:08,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:50:09,188 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 01:50:09,189 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:50:09,189 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:50:09,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [395795363] [2022-11-03 01:50:09,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [395795363] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:50:09,189 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:50:09,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 01:50:09,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530015528] [2022-11-03 01:50:09,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:50:09,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:50:09,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:50:09,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:50:09,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:50:09,191 INFO L87 Difference]: Start difference. First operand 409 states and 564 transitions. Second operand has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:09,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:50:09,399 INFO L93 Difference]: Finished difference Result 1150 states and 1663 transitions. [2022-11-03 01:50:09,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 01:50:09,400 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 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 266 [2022-11-03 01:50:09,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:50:09,401 INFO L225 Difference]: With dead ends: 1150 [2022-11-03 01:50:09,401 INFO L226 Difference]: Without dead ends: 861 [2022-11-03 01:50:09,402 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 01:50:09,402 INFO L413 NwaCegarLoop]: 506 mSDtfsCounter, 1557 mSDsluCounter, 2187 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1557 SdHoareTripleChecker+Valid, 2693 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:50:09,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1557 Valid, 2693 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:50:09,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2022-11-03 01:50:09,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 411. [2022-11-03 01:50:09,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 1.3804878048780487) internal successors, (566), 410 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:09,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 566 transitions. [2022-11-03 01:50:09,412 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 566 transitions. Word has length 266 [2022-11-03 01:50:09,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:50:09,412 INFO L495 AbstractCegarLoop]: Abstraction has 411 states and 566 transitions. [2022-11-03 01:50:09,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:09,412 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 566 transitions. [2022-11-03 01:50:09,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:50:09,413 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:50:09,414 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] [2022-11-03 01:50:09,439 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2022-11-03 01:50:09,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:50:09,614 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:50:09,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:50:09,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1985239731, now seen corresponding path program 1 times [2022-11-03 01:50:09,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:50:09,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1552167806] [2022-11-03 01:50:09,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:50:09,616 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:50:09,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:50:09,617 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:50:09,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2022-11-03 01:50:10,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:50:10,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:50:10,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:50:10,742 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 01:50:10,742 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:50:10,742 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:50:10,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1552167806] [2022-11-03 01:50:10,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1552167806] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:50:10,742 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:50:10,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:50:10,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058813235] [2022-11-03 01:50:10,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:50:10,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:50:10,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:50:10,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:50:10,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:50:10,744 INFO L87 Difference]: Start difference. First operand 411 states and 566 transitions. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:10,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:50:10,941 INFO L93 Difference]: Finished difference Result 1270 states and 1840 transitions. [2022-11-03 01:50:10,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:50:10,943 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 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 266 [2022-11-03 01:50:10,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:50:10,944 INFO L225 Difference]: With dead ends: 1270 [2022-11-03 01:50:10,944 INFO L226 Difference]: Without dead ends: 981 [2022-11-03 01:50:10,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:50:10,945 INFO L413 NwaCegarLoop]: 511 mSDtfsCounter, 1379 mSDsluCounter, 1709 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1379 SdHoareTripleChecker+Valid, 2220 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:50:10,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1379 Valid, 2220 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:50:10,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 981 states. [2022-11-03 01:50:10,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 981 to 413. [2022-11-03 01:50:10,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 1.3786407766990292) internal successors, (568), 412 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:10,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 568 transitions. [2022-11-03 01:50:10,956 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 568 transitions. Word has length 266 [2022-11-03 01:50:10,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:50:10,957 INFO L495 AbstractCegarLoop]: Abstraction has 413 states and 568 transitions. [2022-11-03 01:50:10,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:10,957 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 568 transitions. [2022-11-03 01:50:10,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:50:10,958 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:50:10,958 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] [2022-11-03 01:50:10,982 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2022-11-03 01:50:11,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:50:11,178 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:50:11,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:50:11,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1883173067, now seen corresponding path program 1 times [2022-11-03 01:50:11,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:50:11,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1839255701] [2022-11-03 01:50:11,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:50:11,180 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:50:11,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:50:11,181 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:50:11,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2022-11-03 01:50:11,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:50:11,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 01:50:11,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:50:12,471 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 01:50:12,472 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:50:12,472 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:50:12,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1839255701] [2022-11-03 01:50:12,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1839255701] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:50:12,472 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:50:12,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:50:12,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34737608] [2022-11-03 01:50:12,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:50:12,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:50:12,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:50:12,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:50:12,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:50:12,474 INFO L87 Difference]: Start difference. First operand 413 states and 568 transitions. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:12,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:50:12,714 INFO L93 Difference]: Finished difference Result 1231 states and 1782 transitions. [2022-11-03 01:50:12,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:50:12,716 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 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 266 [2022-11-03 01:50:12,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:50:12,717 INFO L225 Difference]: With dead ends: 1231 [2022-11-03 01:50:12,717 INFO L226 Difference]: Without dead ends: 942 [2022-11-03 01:50:12,718 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:50:12,718 INFO L413 NwaCegarLoop]: 516 mSDtfsCounter, 1325 mSDsluCounter, 1679 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1325 SdHoareTripleChecker+Valid, 2195 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:50:12,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1325 Valid, 2195 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:50:12,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 942 states. [2022-11-03 01:50:12,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 942 to 415. [2022-11-03 01:50:12,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 1.3768115942028984) internal successors, (570), 414 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:12,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 570 transitions. [2022-11-03 01:50:12,729 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 570 transitions. Word has length 266 [2022-11-03 01:50:12,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:50:12,730 INFO L495 AbstractCegarLoop]: Abstraction has 415 states and 570 transitions. [2022-11-03 01:50:12,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:12,730 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 570 transitions. [2022-11-03 01:50:12,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:50:12,731 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:50:12,732 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] [2022-11-03 01:50:12,750 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2022-11-03 01:50:12,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:50:12,938 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:50:12,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:50:12,938 INFO L85 PathProgramCache]: Analyzing trace with hash -2039153609, now seen corresponding path program 1 times [2022-11-03 01:50:12,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:50:12,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1396169558] [2022-11-03 01:50:12,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:50:12,940 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:50:12,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:50:12,941 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:50:12,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2022-11-03 01:50:13,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:50:13,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:50:13,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:50:13,961 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 01:50:13,961 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:50:13,961 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:50:13,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1396169558] [2022-11-03 01:50:13,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1396169558] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:50:13,961 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:50:13,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 01:50:13,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809801772] [2022-11-03 01:50:13,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:50:13,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:50:13,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:50:13,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:50:13,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:50:13,963 INFO L87 Difference]: Start difference. First operand 415 states and 570 transitions. Second operand has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:14,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:50:14,178 INFO L93 Difference]: Finished difference Result 1150 states and 1660 transitions. [2022-11-03 01:50:14,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 01:50:14,179 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 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 266 [2022-11-03 01:50:14,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:50:14,181 INFO L225 Difference]: With dead ends: 1150 [2022-11-03 01:50:14,181 INFO L226 Difference]: Without dead ends: 861 [2022-11-03 01:50:14,182 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 01:50:14,182 INFO L413 NwaCegarLoop]: 512 mSDtfsCounter, 1533 mSDsluCounter, 2160 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1533 SdHoareTripleChecker+Valid, 2672 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:50:14,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1533 Valid, 2672 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:50:14,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2022-11-03 01:50:14,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 417. [2022-11-03 01:50:14,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 416 states have (on average 1.375) internal successors, (572), 416 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:14,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 572 transitions. [2022-11-03 01:50:14,193 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 572 transitions. Word has length 266 [2022-11-03 01:50:14,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:50:14,193 INFO L495 AbstractCegarLoop]: Abstraction has 417 states and 572 transitions. [2022-11-03 01:50:14,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:14,194 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 572 transitions. [2022-11-03 01:50:14,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:50:14,195 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:50:14,195 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] [2022-11-03 01:50:14,218 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (49)] Ended with exit code 0 [2022-11-03 01:50:14,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:50:14,418 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:50:14,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:50:14,419 INFO L85 PathProgramCache]: Analyzing trace with hash 467943865, now seen corresponding path program 1 times [2022-11-03 01:50:14,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:50:14,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [493876476] [2022-11-03 01:50:14,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:50:14,420 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:50:14,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:50:14,421 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:50:14,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2022-11-03 01:50:15,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:50:15,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:50:15,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:50:15,572 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 01:50:15,572 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:50:15,572 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:50:15,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [493876476] [2022-11-03 01:50:15,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [493876476] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:50:15,572 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:50:15,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:50:15,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716009037] [2022-11-03 01:50:15,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:50:15,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:50:15,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:50:15,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:50:15,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:50:15,574 INFO L87 Difference]: Start difference. First operand 417 states and 572 transitions. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:15,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:50:15,810 INFO L93 Difference]: Finished difference Result 1280 states and 1852 transitions. [2022-11-03 01:50:15,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:50:15,812 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 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 266 [2022-11-03 01:50:15,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:50:15,814 INFO L225 Difference]: With dead ends: 1280 [2022-11-03 01:50:15,814 INFO L226 Difference]: Without dead ends: 991 [2022-11-03 01:50:15,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:50:15,815 INFO L413 NwaCegarLoop]: 517 mSDtfsCounter, 1378 mSDsluCounter, 1705 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1378 SdHoareTripleChecker+Valid, 2222 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:50:15,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1378 Valid, 2222 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:50:15,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 991 states. [2022-11-03 01:50:15,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 991 to 419. [2022-11-03 01:50:15,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 418 states have (on average 1.3732057416267942) internal successors, (574), 418 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:15,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 574 transitions. [2022-11-03 01:50:15,825 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 574 transitions. Word has length 266 [2022-11-03 01:50:15,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:50:15,826 INFO L495 AbstractCegarLoop]: Abstraction has 419 states and 574 transitions. [2022-11-03 01:50:15,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:15,826 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 574 transitions. [2022-11-03 01:50:15,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:50:15,828 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:50:15,828 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] [2022-11-03 01:50:15,852 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (50)] Ended with exit code 0 [2022-11-03 01:50:16,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:50:16,050 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:50:16,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:50:16,051 INFO L85 PathProgramCache]: Analyzing trace with hash 537591739, now seen corresponding path program 1 times [2022-11-03 01:50:16,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:50:16,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1898019692] [2022-11-03 01:50:16,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:50:16,052 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:50:16,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:50:16,054 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:50:16,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2022-11-03 01:50:16,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:50:16,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:50:16,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:50:17,066 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 01:50:17,066 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:50:17,066 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:50:17,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1898019692] [2022-11-03 01:50:17,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1898019692] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:50:17,067 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:50:17,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 01:50:17,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761206300] [2022-11-03 01:50:17,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:50:17,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:50:17,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:50:17,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:50:17,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:50:17,068 INFO L87 Difference]: Start difference. First operand 419 states and 574 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:17,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:50:17,785 INFO L93 Difference]: Finished difference Result 1806 states and 2633 transitions. [2022-11-03 01:50:17,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-03 01:50:17,785 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 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 266 [2022-11-03 01:50:17,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:50:17,787 INFO L225 Difference]: With dead ends: 1806 [2022-11-03 01:50:17,787 INFO L226 Difference]: Without dead ends: 1517 [2022-11-03 01:50:17,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=189, Invalid=461, Unknown=0, NotChecked=0, Total=650 [2022-11-03 01:50:17,788 INFO L413 NwaCegarLoop]: 620 mSDtfsCounter, 3542 mSDsluCounter, 5156 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3542 SdHoareTripleChecker+Valid, 5776 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:50:17,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3542 Valid, 5776 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 01:50:17,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1517 states. [2022-11-03 01:50:17,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1517 to 445. [2022-11-03 01:50:17,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 444 states have (on average 1.3783783783783783) internal successors, (612), 444 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:17,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 612 transitions. [2022-11-03 01:50:17,801 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 612 transitions. Word has length 266 [2022-11-03 01:50:17,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:50:17,801 INFO L495 AbstractCegarLoop]: Abstraction has 445 states and 612 transitions. [2022-11-03 01:50:17,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:17,802 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 612 transitions. [2022-11-03 01:50:17,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:50:17,803 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:50:17,803 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] [2022-11-03 01:50:17,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (51)] Forceful destruction successful, exit code 0 [2022-11-03 01:50:18,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:50:18,026 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:50:18,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:50:18,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1936545341, now seen corresponding path program 1 times [2022-11-03 01:50:18,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:50:18,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2057822675] [2022-11-03 01:50:18,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:50:18,028 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:50:18,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:50:18,029 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:50:18,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2022-11-03 01:50:18,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:50:18,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:50:18,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:50:19,205 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 01:50:19,206 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:50:19,206 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:50:19,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2057822675] [2022-11-03 01:50:19,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2057822675] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:50:19,206 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:50:19,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 01:50:19,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983789520] [2022-11-03 01:50:19,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:50:19,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 01:50:19,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:50:19,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 01:50:19,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 01:50:19,208 INFO L87 Difference]: Start difference. First operand 445 states and 612 transitions. Second operand has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:20,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:50:20,876 INFO L93 Difference]: Finished difference Result 2062 states and 2989 transitions. [2022-11-03 01:50:20,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 01:50:20,877 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 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 266 [2022-11-03 01:50:20,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:50:20,881 INFO L225 Difference]: With dead ends: 2062 [2022-11-03 01:50:20,881 INFO L226 Difference]: Without dead ends: 1747 [2022-11-03 01:50:20,882 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2022-11-03 01:50:20,883 INFO L413 NwaCegarLoop]: 467 mSDtfsCounter, 3360 mSDsluCounter, 3611 mSDsCounter, 0 mSdLazyCounter, 1120 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3360 SdHoareTripleChecker+Valid, 4078 SdHoareTripleChecker+Invalid, 1137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:50:20,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3360 Valid, 4078 Invalid, 1137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1120 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-03 01:50:20,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1747 states. [2022-11-03 01:50:20,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1747 to 529. [2022-11-03 01:50:20,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 528 states have (on average 1.3674242424242424) internal successors, (722), 528 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:20,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 722 transitions. [2022-11-03 01:50:20,899 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 722 transitions. Word has length 266 [2022-11-03 01:50:20,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:50:20,899 INFO L495 AbstractCegarLoop]: Abstraction has 529 states and 722 transitions. [2022-11-03 01:50:20,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:20,899 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 722 transitions. [2022-11-03 01:50:20,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:50:20,901 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:50:20,901 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] [2022-11-03 01:50:20,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (52)] Forceful destruction successful, exit code 0 [2022-11-03 01:50:21,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:50:21,127 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:50:21,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:50:21,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1994955457, now seen corresponding path program 1 times [2022-11-03 01:50:21,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:50:21,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [531902608] [2022-11-03 01:50:21,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:50:21,129 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:50:21,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:50:21,131 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:50:21,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2022-11-03 01:50:21,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:50:21,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:50:21,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:50:22,401 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 01:50:22,401 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:50:22,401 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:50:22,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [531902608] [2022-11-03 01:50:22,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [531902608] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:50:22,402 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:50:22,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 01:50:22,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590828872] [2022-11-03 01:50:22,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:50:22,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 01:50:22,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:50:22,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 01:50:22,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 01:50:22,403 INFO L87 Difference]: Start difference. First operand 529 states and 722 transitions. Second operand has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:24,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:50:24,069 INFO L93 Difference]: Finished difference Result 2124 states and 3077 transitions. [2022-11-03 01:50:24,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 01:50:24,070 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 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 266 [2022-11-03 01:50:24,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:50:24,072 INFO L225 Difference]: With dead ends: 2124 [2022-11-03 01:50:24,073 INFO L226 Difference]: Without dead ends: 1751 [2022-11-03 01:50:24,074 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2022-11-03 01:50:24,074 INFO L413 NwaCegarLoop]: 476 mSDtfsCounter, 3357 mSDsluCounter, 3621 mSDsCounter, 0 mSdLazyCounter, 1117 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3357 SdHoareTripleChecker+Valid, 4097 SdHoareTripleChecker+Invalid, 1135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:50:24,074 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3357 Valid, 4097 Invalid, 1135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1117 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-03 01:50:24,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1751 states. [2022-11-03 01:50:24,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1751 to 533. [2022-11-03 01:50:24,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 533 states, 532 states have (on average 1.3665413533834587) internal successors, (727), 532 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:24,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 727 transitions. [2022-11-03 01:50:24,090 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 727 transitions. Word has length 266 [2022-11-03 01:50:24,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:50:24,091 INFO L495 AbstractCegarLoop]: Abstraction has 533 states and 727 transitions. [2022-11-03 01:50:24,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:24,091 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 727 transitions. [2022-11-03 01:50:24,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:50:24,093 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:50:24,093 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] [2022-11-03 01:50:24,116 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (53)] Ended with exit code 0 [2022-11-03 01:50:24,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:50:24,306 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:50:24,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:50:24,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1351959873, now seen corresponding path program 1 times [2022-11-03 01:50:24,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:50:24,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1245482085] [2022-11-03 01:50:24,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:50:24,308 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:50:24,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:50:24,309 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:50:24,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2022-11-03 01:50:25,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:50:25,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:50:25,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:50:25,658 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 01:50:25,658 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:50:25,659 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:50:25,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1245482085] [2022-11-03 01:50:25,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1245482085] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:50:25,659 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:50:25,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 01:50:25,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850542661] [2022-11-03 01:50:25,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:50:25,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 01:50:25,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:50:25,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 01:50:25,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 01:50:25,661 INFO L87 Difference]: Start difference. First operand 533 states and 727 transitions. Second operand has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:27,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:50:27,342 INFO L93 Difference]: Finished difference Result 2130 states and 3083 transitions. [2022-11-03 01:50:27,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 01:50:27,343 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 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 266 [2022-11-03 01:50:27,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:50:27,346 INFO L225 Difference]: With dead ends: 2130 [2022-11-03 01:50:27,346 INFO L226 Difference]: Without dead ends: 1753 [2022-11-03 01:50:27,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2022-11-03 01:50:27,347 INFO L413 NwaCegarLoop]: 479 mSDtfsCounter, 3354 mSDsluCounter, 3622 mSDsCounter, 0 mSdLazyCounter, 1120 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3354 SdHoareTripleChecker+Valid, 4101 SdHoareTripleChecker+Invalid, 1138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:50:27,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3354 Valid, 4101 Invalid, 1138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1120 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-03 01:50:27,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1753 states. [2022-11-03 01:50:27,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1753 to 535. [2022-11-03 01:50:27,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 534 states have (on average 1.3651685393258426) internal successors, (729), 534 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:27,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 729 transitions. [2022-11-03 01:50:27,363 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 729 transitions. Word has length 266 [2022-11-03 01:50:27,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:50:27,364 INFO L495 AbstractCegarLoop]: Abstraction has 535 states and 729 transitions. [2022-11-03 01:50:27,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:27,364 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 729 transitions. [2022-11-03 01:50:27,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:50:27,365 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:50:27,366 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] [2022-11-03 01:50:27,389 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (54)] Ended with exit code 0 [2022-11-03 01:50:27,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:50:27,589 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:50:27,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:50:27,590 INFO L85 PathProgramCache]: Analyzing trace with hash 917454275, now seen corresponding path program 1 times [2022-11-03 01:50:27,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:50:27,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [228824547] [2022-11-03 01:50:27,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:50:27,592 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:50:27,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:50:27,593 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:50:27,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2022-11-03 01:50:28,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:50:28,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:50:28,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:50:28,928 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 01:50:28,928 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:50:28,928 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:50:28,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [228824547] [2022-11-03 01:50:28,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [228824547] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:50:28,928 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:50:28,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 01:50:28,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240910720] [2022-11-03 01:50:28,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:50:28,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 01:50:28,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:50:28,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 01:50:28,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 01:50:28,930 INFO L87 Difference]: Start difference. First operand 535 states and 729 transitions. Second operand has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:30,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:50:30,591 INFO L93 Difference]: Finished difference Result 2134 states and 3086 transitions. [2022-11-03 01:50:30,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 01:50:30,592 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 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 266 [2022-11-03 01:50:30,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:50:30,594 INFO L225 Difference]: With dead ends: 2134 [2022-11-03 01:50:30,594 INFO L226 Difference]: Without dead ends: 1755 [2022-11-03 01:50:30,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2022-11-03 01:50:30,595 INFO L413 NwaCegarLoop]: 482 mSDtfsCounter, 3351 mSDsluCounter, 3623 mSDsCounter, 0 mSdLazyCounter, 1123 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3351 SdHoareTripleChecker+Valid, 4105 SdHoareTripleChecker+Invalid, 1141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:50:30,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3351 Valid, 4105 Invalid, 1141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1123 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-03 01:50:30,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1755 states. [2022-11-03 01:50:30,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1755 to 537. [2022-11-03 01:50:30,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 536 states have (on average 1.3638059701492538) internal successors, (731), 536 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:30,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 731 transitions. [2022-11-03 01:50:30,610 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 731 transitions. Word has length 266 [2022-11-03 01:50:30,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:50:30,610 INFO L495 AbstractCegarLoop]: Abstraction has 537 states and 731 transitions. [2022-11-03 01:50:30,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:30,611 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 731 transitions. [2022-11-03 01:50:30,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:50:30,612 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:50:30,612 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] [2022-11-03 01:50:30,634 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (55)] Forceful destruction successful, exit code 0 [2022-11-03 01:50:30,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:50:30,830 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:50:30,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:50:30,831 INFO L85 PathProgramCache]: Analyzing trace with hash 210857669, now seen corresponding path program 1 times [2022-11-03 01:50:30,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:50:30,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [172025850] [2022-11-03 01:50:30,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:50:30,832 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:50:30,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:50:30,833 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:50:30,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2022-11-03 01:50:31,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:50:31,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:50:31,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:50:32,122 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 01:50:32,122 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:50:32,123 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:50:32,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [172025850] [2022-11-03 01:50:32,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [172025850] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:50:32,123 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:50:32,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 01:50:32,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199585364] [2022-11-03 01:50:32,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:50:32,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 01:50:32,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:50:32,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 01:50:32,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 01:50:32,125 INFO L87 Difference]: Start difference. First operand 537 states and 731 transitions. Second operand has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:33,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:50:33,810 INFO L93 Difference]: Finished difference Result 2138 states and 3089 transitions. [2022-11-03 01:50:33,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 01:50:33,810 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 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 266 [2022-11-03 01:50:33,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:50:33,812 INFO L225 Difference]: With dead ends: 2138 [2022-11-03 01:50:33,812 INFO L226 Difference]: Without dead ends: 1757 [2022-11-03 01:50:33,813 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2022-11-03 01:50:33,813 INFO L413 NwaCegarLoop]: 485 mSDtfsCounter, 3348 mSDsluCounter, 3624 mSDsCounter, 0 mSdLazyCounter, 1126 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3348 SdHoareTripleChecker+Valid, 4109 SdHoareTripleChecker+Invalid, 1144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:50:33,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3348 Valid, 4109 Invalid, 1144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1126 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-03 01:50:33,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1757 states. [2022-11-03 01:50:33,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1757 to 539. [2022-11-03 01:50:33,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 538 states have (on average 1.362453531598513) internal successors, (733), 538 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:33,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 733 transitions. [2022-11-03 01:50:33,827 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 733 transitions. Word has length 266 [2022-11-03 01:50:33,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:50:33,827 INFO L495 AbstractCegarLoop]: Abstraction has 539 states and 733 transitions. [2022-11-03 01:50:33,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:33,827 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 733 transitions. [2022-11-03 01:50:33,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:50:33,829 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:50:33,829 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] [2022-11-03 01:50:33,849 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (56)] Ended with exit code 0 [2022-11-03 01:50:34,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:50:34,042 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:50:34,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:50:34,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1072691271, now seen corresponding path program 1 times [2022-11-03 01:50:34,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:50:34,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [63210718] [2022-11-03 01:50:34,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:50:34,044 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:50:34,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:50:34,045 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:50:34,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2022-11-03 01:50:34,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:50:34,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:50:34,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:50:35,297 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 01:50:35,297 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:50:35,297 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:50:35,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [63210718] [2022-11-03 01:50:35,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [63210718] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:50:35,297 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:50:35,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 01:50:35,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781925837] [2022-11-03 01:50:35,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:50:35,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 01:50:35,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:50:35,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 01:50:35,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 01:50:35,299 INFO L87 Difference]: Start difference. First operand 539 states and 733 transitions. Second operand has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:36,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:50:36,922 INFO L93 Difference]: Finished difference Result 2142 states and 3092 transitions. [2022-11-03 01:50:36,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 01:50:36,923 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 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 266 [2022-11-03 01:50:36,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:50:36,924 INFO L225 Difference]: With dead ends: 2142 [2022-11-03 01:50:36,924 INFO L226 Difference]: Without dead ends: 1759 [2022-11-03 01:50:36,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2022-11-03 01:50:36,925 INFO L413 NwaCegarLoop]: 488 mSDtfsCounter, 3345 mSDsluCounter, 3625 mSDsCounter, 0 mSdLazyCounter, 1129 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3345 SdHoareTripleChecker+Valid, 4113 SdHoareTripleChecker+Invalid, 1147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:50:36,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3345 Valid, 4113 Invalid, 1147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1129 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-03 01:50:36,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1759 states. [2022-11-03 01:50:36,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1759 to 541. [2022-11-03 01:50:36,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 540 states have (on average 1.3611111111111112) internal successors, (735), 540 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:36,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 735 transitions. [2022-11-03 01:50:36,934 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 735 transitions. Word has length 266 [2022-11-03 01:50:36,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:50:36,934 INFO L495 AbstractCegarLoop]: Abstraction has 541 states and 735 transitions. [2022-11-03 01:50:36,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:36,935 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 735 transitions. [2022-11-03 01:50:36,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:50:36,936 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:50:36,936 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] [2022-11-03 01:50:36,957 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (57)] Forceful destruction successful, exit code 0 [2022-11-03 01:50:37,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:50:37,146 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:50:37,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:50:37,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1560738377, now seen corresponding path program 1 times [2022-11-03 01:50:37,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:50:37,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1207575046] [2022-11-03 01:50:37,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:50:37,148 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:50:37,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:50:37,149 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:50:37,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2022-11-03 01:50:37,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:50:37,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:50:37,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:50:38,391 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 01:50:38,391 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:50:38,391 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:50:38,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1207575046] [2022-11-03 01:50:38,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1207575046] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:50:38,392 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:50:38,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 01:50:38,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632434414] [2022-11-03 01:50:38,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:50:38,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 01:50:38,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:50:38,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 01:50:38,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 01:50:38,393 INFO L87 Difference]: Start difference. First operand 541 states and 735 transitions. Second operand has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:40,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:50:40,053 INFO L93 Difference]: Finished difference Result 2146 states and 3095 transitions. [2022-11-03 01:50:40,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 01:50:40,054 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 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 266 [2022-11-03 01:50:40,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:50:40,056 INFO L225 Difference]: With dead ends: 2146 [2022-11-03 01:50:40,056 INFO L226 Difference]: Without dead ends: 1761 [2022-11-03 01:50:40,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2022-11-03 01:50:40,057 INFO L413 NwaCegarLoop]: 491 mSDtfsCounter, 3342 mSDsluCounter, 3626 mSDsCounter, 0 mSdLazyCounter, 1132 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3342 SdHoareTripleChecker+Valid, 4117 SdHoareTripleChecker+Invalid, 1150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:50:40,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3342 Valid, 4117 Invalid, 1150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1132 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-03 01:50:40,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1761 states. [2022-11-03 01:50:40,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1761 to 543. [2022-11-03 01:50:40,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 543 states, 542 states have (on average 1.3597785977859778) internal successors, (737), 542 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:40,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 737 transitions. [2022-11-03 01:50:40,069 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 737 transitions. Word has length 266 [2022-11-03 01:50:40,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:50:40,069 INFO L495 AbstractCegarLoop]: Abstraction has 543 states and 737 transitions. [2022-11-03 01:50:40,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:40,070 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 737 transitions. [2022-11-03 01:50:40,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:50:40,071 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:50:40,071 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] [2022-11-03 01:50:40,093 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (58)] Ended with exit code 0 [2022-11-03 01:50:40,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:50:40,282 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:50:40,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:50:40,282 INFO L85 PathProgramCache]: Analyzing trace with hash 278566091, now seen corresponding path program 1 times [2022-11-03 01:50:40,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:50:40,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1519803633] [2022-11-03 01:50:40,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:50:40,284 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:50:40,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:50:40,285 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:50:40,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (59)] Waiting until timeout for monitored process [2022-11-03 01:50:41,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:50:41,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:50:41,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:50:41,600 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 01:50:41,600 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:50:41,600 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:50:41,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1519803633] [2022-11-03 01:50:41,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1519803633] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:50:41,600 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:50:41,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 01:50:41,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064181412] [2022-11-03 01:50:41,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:50:41,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 01:50:41,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:50:41,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 01:50:41,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 01:50:41,602 INFO L87 Difference]: Start difference. First operand 543 states and 737 transitions. Second operand has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:43,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:50:43,362 INFO L93 Difference]: Finished difference Result 2152 states and 3101 transitions. [2022-11-03 01:50:43,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 01:50:43,363 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 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 266 [2022-11-03 01:50:43,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:50:43,365 INFO L225 Difference]: With dead ends: 2152 [2022-11-03 01:50:43,365 INFO L226 Difference]: Without dead ends: 1765 [2022-11-03 01:50:43,367 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2022-11-03 01:50:43,367 INFO L413 NwaCegarLoop]: 498 mSDtfsCounter, 3340 mSDsluCounter, 3629 mSDsCounter, 0 mSdLazyCounter, 1138 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3340 SdHoareTripleChecker+Valid, 4127 SdHoareTripleChecker+Invalid, 1156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-03 01:50:43,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3340 Valid, 4127 Invalid, 1156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1138 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-03 01:50:43,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1765 states. [2022-11-03 01:50:43,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1765 to 547. [2022-11-03 01:50:43,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 546 states have (on average 1.358974358974359) internal successors, (742), 546 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:43,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 742 transitions. [2022-11-03 01:50:43,378 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 742 transitions. Word has length 266 [2022-11-03 01:50:43,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:50:43,379 INFO L495 AbstractCegarLoop]: Abstraction has 547 states and 742 transitions. [2022-11-03 01:50:43,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:43,379 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 742 transitions. [2022-11-03 01:50:43,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:50:43,380 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:50:43,380 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] [2022-11-03 01:50:43,405 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (59)] Ended with exit code 0 [2022-11-03 01:50:43,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:50:43,581 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:50:43,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:50:43,581 INFO L85 PathProgramCache]: Analyzing trace with hash -2087468979, now seen corresponding path program 1 times [2022-11-03 01:50:43,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:50:43,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1300961138] [2022-11-03 01:50:43,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:50:43,583 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:50:43,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:50:43,583 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:50:43,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (60)] Waiting until timeout for monitored process [2022-11-03 01:50:44,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:50:44,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:50:44,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:50:44,904 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 01:50:44,904 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:50:44,904 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:50:44,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1300961138] [2022-11-03 01:50:44,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1300961138] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:50:44,904 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:50:44,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 01:50:44,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780323677] [2022-11-03 01:50:44,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:50:44,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 01:50:44,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:50:44,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 01:50:44,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 01:50:44,906 INFO L87 Difference]: Start difference. First operand 547 states and 742 transitions. Second operand has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:46,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:50:46,646 INFO L93 Difference]: Finished difference Result 2158 states and 3107 transitions. [2022-11-03 01:50:46,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 01:50:46,647 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 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 266 [2022-11-03 01:50:46,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:50:46,648 INFO L225 Difference]: With dead ends: 2158 [2022-11-03 01:50:46,649 INFO L226 Difference]: Without dead ends: 1767 [2022-11-03 01:50:46,649 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2022-11-03 01:50:46,650 INFO L413 NwaCegarLoop]: 501 mSDtfsCounter, 3337 mSDsluCounter, 3630 mSDsCounter, 0 mSdLazyCounter, 1141 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3337 SdHoareTripleChecker+Valid, 4131 SdHoareTripleChecker+Invalid, 1159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:50:46,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3337 Valid, 4131 Invalid, 1159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1141 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-03 01:50:46,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1767 states. [2022-11-03 01:50:46,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1767 to 549. [2022-11-03 01:50:46,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 548 states have (on average 1.3576642335766422) internal successors, (744), 548 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:46,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 744 transitions. [2022-11-03 01:50:46,668 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 744 transitions. Word has length 266 [2022-11-03 01:50:46,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:50:46,668 INFO L495 AbstractCegarLoop]: Abstraction has 549 states and 744 transitions. [2022-11-03 01:50:46,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:46,668 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 744 transitions. [2022-11-03 01:50:46,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:50:46,669 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:50:46,670 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] [2022-11-03 01:50:46,690 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (60)] Forceful destruction successful, exit code 0 [2022-11-03 01:50:46,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:50:46,870 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:50:46,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:50:46,871 INFO L85 PathProgramCache]: Analyzing trace with hash -360324017, now seen corresponding path program 1 times [2022-11-03 01:50:46,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:50:46,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1789609400] [2022-11-03 01:50:46,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:50:46,873 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:50:46,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:50:46,874 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:50:46,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (61)] Waiting until timeout for monitored process [2022-11-03 01:50:47,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:50:47,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:50:47,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:50:48,166 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 01:50:48,166 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:50:48,166 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:50:48,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1789609400] [2022-11-03 01:50:48,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1789609400] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:50:48,167 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:50:48,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 01:50:48,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153772951] [2022-11-03 01:50:48,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:50:48,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 01:50:48,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:50:48,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 01:50:48,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 01:50:48,169 INFO L87 Difference]: Start difference. First operand 549 states and 744 transitions. Second operand has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:49,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:50:49,911 INFO L93 Difference]: Finished difference Result 2162 states and 3110 transitions. [2022-11-03 01:50:49,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 01:50:49,912 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 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 266 [2022-11-03 01:50:49,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:50:49,914 INFO L225 Difference]: With dead ends: 2162 [2022-11-03 01:50:49,914 INFO L226 Difference]: Without dead ends: 1769 [2022-11-03 01:50:49,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2022-11-03 01:50:49,915 INFO L413 NwaCegarLoop]: 504 mSDtfsCounter, 3334 mSDsluCounter, 3631 mSDsCounter, 0 mSdLazyCounter, 1144 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3334 SdHoareTripleChecker+Valid, 4135 SdHoareTripleChecker+Invalid, 1162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-03 01:50:49,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3334 Valid, 4135 Invalid, 1162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1144 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-03 01:50:49,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1769 states. [2022-11-03 01:50:49,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1769 to 551. [2022-11-03 01:50:49,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 551 states, 550 states have (on average 1.3563636363636364) internal successors, (746), 550 states have internal predecessors, (746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:49,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 551 states to 551 states and 746 transitions. [2022-11-03 01:50:49,925 INFO L78 Accepts]: Start accepts. Automaton has 551 states and 746 transitions. Word has length 266 [2022-11-03 01:50:49,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:50:49,925 INFO L495 AbstractCegarLoop]: Abstraction has 551 states and 746 transitions. [2022-11-03 01:50:49,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:49,925 INFO L276 IsEmpty]: Start isEmpty. Operand 551 states and 746 transitions. [2022-11-03 01:50:49,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:50:49,927 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:50:49,927 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] [2022-11-03 01:50:49,949 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (61)] Ended with exit code 0 [2022-11-03 01:50:50,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:50:50,127 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:50:50,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:50:50,128 INFO L85 PathProgramCache]: Analyzing trace with hash -2007686959, now seen corresponding path program 1 times [2022-11-03 01:50:50,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:50:50,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2088223825] [2022-11-03 01:50:50,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:50:50,129 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:50:50,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:50:50,131 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:50:50,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (62)] Waiting until timeout for monitored process [2022-11-03 01:50:50,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:50:50,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:50:50,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:50:51,463 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 01:50:51,463 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:50:51,464 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:50:51,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2088223825] [2022-11-03 01:50:51,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2088223825] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:50:51,464 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:50:51,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 01:50:51,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312394922] [2022-11-03 01:50:51,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:50:51,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 01:50:51,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:50:51,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 01:50:51,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 01:50:51,466 INFO L87 Difference]: Start difference. First operand 551 states and 746 transitions. Second operand has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:53,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:50:53,180 INFO L93 Difference]: Finished difference Result 2166 states and 3113 transitions. [2022-11-03 01:50:53,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 01:50:53,181 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 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 266 [2022-11-03 01:50:53,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:50:53,183 INFO L225 Difference]: With dead ends: 2166 [2022-11-03 01:50:53,183 INFO L226 Difference]: Without dead ends: 1771 [2022-11-03 01:50:53,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2022-11-03 01:50:53,184 INFO L413 NwaCegarLoop]: 507 mSDtfsCounter, 3331 mSDsluCounter, 3632 mSDsCounter, 0 mSdLazyCounter, 1147 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3331 SdHoareTripleChecker+Valid, 4139 SdHoareTripleChecker+Invalid, 1165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:50:53,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3331 Valid, 4139 Invalid, 1165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1147 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-03 01:50:53,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1771 states. [2022-11-03 01:50:53,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1771 to 553. [2022-11-03 01:50:53,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 552 states have (on average 1.355072463768116) internal successors, (748), 552 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:53,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 748 transitions. [2022-11-03 01:50:53,195 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 748 transitions. Word has length 266 [2022-11-03 01:50:53,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:50:53,195 INFO L495 AbstractCegarLoop]: Abstraction has 553 states and 748 transitions. [2022-11-03 01:50:53,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:53,196 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 748 transitions. [2022-11-03 01:50:53,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:50:53,197 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:50:53,197 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] [2022-11-03 01:50:53,218 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (62)] Ended with exit code 0 [2022-11-03 01:50:53,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:50:53,406 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:50:53,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:50:53,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1248695763, now seen corresponding path program 1 times [2022-11-03 01:50:53,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:50:53,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1012845083] [2022-11-03 01:50:53,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:50:53,408 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:50:53,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:50:53,414 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:50:53,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (63)] Waiting until timeout for monitored process [2022-11-03 01:50:54,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:50:54,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:50:54,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:50:54,748 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 01:50:54,749 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:50:54,749 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:50:54,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1012845083] [2022-11-03 01:50:54,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1012845083] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:50:54,749 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:50:54,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 01:50:54,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982847770] [2022-11-03 01:50:54,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:50:54,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 01:50:54,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:50:54,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 01:50:54,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 01:50:54,751 INFO L87 Difference]: Start difference. First operand 553 states and 748 transitions. Second operand has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:56,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:50:56,470 INFO L93 Difference]: Finished difference Result 2170 states and 3116 transitions. [2022-11-03 01:50:56,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 01:50:56,471 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 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 266 [2022-11-03 01:50:56,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:50:56,473 INFO L225 Difference]: With dead ends: 2170 [2022-11-03 01:50:56,473 INFO L226 Difference]: Without dead ends: 1773 [2022-11-03 01:50:56,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2022-11-03 01:50:56,474 INFO L413 NwaCegarLoop]: 510 mSDtfsCounter, 3328 mSDsluCounter, 3633 mSDsCounter, 0 mSdLazyCounter, 1150 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3328 SdHoareTripleChecker+Valid, 4143 SdHoareTripleChecker+Invalid, 1168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:50:56,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3328 Valid, 4143 Invalid, 1168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1150 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-03 01:50:56,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1773 states. [2022-11-03 01:50:56,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1773 to 555. [2022-11-03 01:50:56,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 554 states have (on average 1.3537906137184115) internal successors, (750), 554 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:56,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 750 transitions. [2022-11-03 01:50:56,488 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 750 transitions. Word has length 266 [2022-11-03 01:50:56,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:50:56,488 INFO L495 AbstractCegarLoop]: Abstraction has 555 states and 750 transitions. [2022-11-03 01:50:56,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:56,489 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 750 transitions. [2022-11-03 01:50:56,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:50:56,490 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:50:56,490 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] [2022-11-03 01:50:56,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (63)] Forceful destruction successful, exit code 0 [2022-11-03 01:50:56,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:50:56,691 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:50:56,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:50:56,691 INFO L85 PathProgramCache]: Analyzing trace with hash -893164715, now seen corresponding path program 1 times [2022-11-03 01:50:56,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:50:56,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [647226572] [2022-11-03 01:50:56,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:50:56,693 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:50:56,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:50:56,694 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:50:56,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (64)] Waiting until timeout for monitored process [2022-11-03 01:50:57,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:50:57,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:50:57,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:50:58,091 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 01:50:58,091 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:50:58,092 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:50:58,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [647226572] [2022-11-03 01:50:58,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [647226572] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:50:58,092 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:50:58,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 01:50:58,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97290678] [2022-11-03 01:50:58,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:50:58,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 01:50:58,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:50:58,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 01:50:58,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 01:50:58,094 INFO L87 Difference]: Start difference. First operand 555 states and 750 transitions. Second operand has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:59,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:50:59,808 INFO L93 Difference]: Finished difference Result 2174 states and 3119 transitions. [2022-11-03 01:50:59,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 01:50:59,808 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 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 266 [2022-11-03 01:50:59,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:50:59,810 INFO L225 Difference]: With dead ends: 2174 [2022-11-03 01:50:59,810 INFO L226 Difference]: Without dead ends: 1775 [2022-11-03 01:50:59,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2022-11-03 01:50:59,812 INFO L413 NwaCegarLoop]: 513 mSDtfsCounter, 3325 mSDsluCounter, 3634 mSDsCounter, 0 mSdLazyCounter, 1153 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3325 SdHoareTripleChecker+Valid, 4147 SdHoareTripleChecker+Invalid, 1171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:50:59,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3325 Valid, 4147 Invalid, 1171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1153 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-03 01:50:59,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1775 states. [2022-11-03 01:50:59,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1775 to 557. [2022-11-03 01:50:59,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 556 states have (on average 1.3525179856115108) internal successors, (752), 556 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:59,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 752 transitions. [2022-11-03 01:50:59,827 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 752 transitions. Word has length 266 [2022-11-03 01:50:59,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:50:59,828 INFO L495 AbstractCegarLoop]: Abstraction has 557 states and 752 transitions. [2022-11-03 01:50:59,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:59,828 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 752 transitions. [2022-11-03 01:50:59,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:50:59,829 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:50:59,830 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] [2022-11-03 01:50:59,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (64)] Forceful destruction successful, exit code 0 [2022-11-03 01:51:00,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:51:00,046 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:51:00,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:51:00,046 INFO L85 PathProgramCache]: Analyzing trace with hash -774723241, now seen corresponding path program 1 times [2022-11-03 01:51:00,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:51:00,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1844957873] [2022-11-03 01:51:00,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:51:00,048 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:51:00,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:51:00,049 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:51:00,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (65)] Waiting until timeout for monitored process [2022-11-03 01:51:00,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:51:00,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:51:00,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:51:01,434 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 01:51:01,434 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:51:01,434 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:51:01,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1844957873] [2022-11-03 01:51:01,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1844957873] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:51:01,435 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:51:01,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 01:51:01,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385815296] [2022-11-03 01:51:01,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:51:01,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 01:51:01,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:51:01,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 01:51:01,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 01:51:01,437 INFO L87 Difference]: Start difference. First operand 557 states and 752 transitions. Second operand has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:03,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:51:03,160 INFO L93 Difference]: Finished difference Result 2178 states and 3122 transitions. [2022-11-03 01:51:03,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 01:51:03,161 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 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 266 [2022-11-03 01:51:03,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:51:03,163 INFO L225 Difference]: With dead ends: 2178 [2022-11-03 01:51:03,163 INFO L226 Difference]: Without dead ends: 1777 [2022-11-03 01:51:03,164 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2022-11-03 01:51:03,164 INFO L413 NwaCegarLoop]: 516 mSDtfsCounter, 3322 mSDsluCounter, 3635 mSDsCounter, 0 mSdLazyCounter, 1156 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3322 SdHoareTripleChecker+Valid, 4151 SdHoareTripleChecker+Invalid, 1174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:51:03,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3322 Valid, 4151 Invalid, 1174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1156 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-03 01:51:03,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1777 states. [2022-11-03 01:51:03,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1777 to 559. [2022-11-03 01:51:03,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 558 states have (on average 1.3512544802867383) internal successors, (754), 558 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:03,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 754 transitions. [2022-11-03 01:51:03,178 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 754 transitions. Word has length 266 [2022-11-03 01:51:03,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:51:03,179 INFO L495 AbstractCegarLoop]: Abstraction has 559 states and 754 transitions. [2022-11-03 01:51:03,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:03,179 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 754 transitions. [2022-11-03 01:51:03,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:51:03,180 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:51:03,180 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] [2022-11-03 01:51:03,204 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (65)] Forceful destruction successful, exit code 0 [2022-11-03 01:51:03,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:51:03,381 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:51:03,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:51:03,381 INFO L85 PathProgramCache]: Analyzing trace with hash 1486850009, now seen corresponding path program 1 times [2022-11-03 01:51:03,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:51:03,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1517837119] [2022-11-03 01:51:03,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:51:03,383 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:51:03,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:51:03,384 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:51:03,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (66)] Waiting until timeout for monitored process [2022-11-03 01:51:04,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:51:04,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:51:04,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:51:04,708 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 01:51:04,708 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:51:04,709 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:51:04,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1517837119] [2022-11-03 01:51:04,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1517837119] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:51:04,709 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:51:04,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 01:51:04,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996580161] [2022-11-03 01:51:04,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:51:04,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 01:51:04,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:51:04,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 01:51:04,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 01:51:04,712 INFO L87 Difference]: Start difference. First operand 559 states and 754 transitions. Second operand has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:06,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:51:06,435 INFO L93 Difference]: Finished difference Result 2182 states and 3125 transitions. [2022-11-03 01:51:06,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 01:51:06,436 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 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 266 [2022-11-03 01:51:06,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:51:06,438 INFO L225 Difference]: With dead ends: 2182 [2022-11-03 01:51:06,438 INFO L226 Difference]: Without dead ends: 1779 [2022-11-03 01:51:06,439 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2022-11-03 01:51:06,439 INFO L413 NwaCegarLoop]: 519 mSDtfsCounter, 3319 mSDsluCounter, 3636 mSDsCounter, 0 mSdLazyCounter, 1159 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3319 SdHoareTripleChecker+Valid, 4155 SdHoareTripleChecker+Invalid, 1177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:51:06,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3319 Valid, 4155 Invalid, 1177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1159 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-03 01:51:06,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1779 states. [2022-11-03 01:51:06,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1779 to 561. [2022-11-03 01:51:06,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 561 states, 560 states have (on average 1.35) internal successors, (756), 560 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:06,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 756 transitions. [2022-11-03 01:51:06,456 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 756 transitions. Word has length 266 [2022-11-03 01:51:06,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:51:06,456 INFO L495 AbstractCegarLoop]: Abstraction has 561 states and 756 transitions. [2022-11-03 01:51:06,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:06,457 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 756 transitions. [2022-11-03 01:51:06,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:51:06,458 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:51:06,458 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] [2022-11-03 01:51:06,484 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (66)] Ended with exit code 0 [2022-11-03 01:51:06,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:51:06,678 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:51:06,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:51:06,678 INFO L85 PathProgramCache]: Analyzing trace with hash 179707611, now seen corresponding path program 1 times [2022-11-03 01:51:06,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:51:06,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [69878142] [2022-11-03 01:51:06,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:51:06,680 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:51:06,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:51:06,682 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:51:06,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (67)] Waiting until timeout for monitored process [2022-11-03 01:51:07,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:51:07,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:51:07,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:51:08,093 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 01:51:08,094 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:51:08,094 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:51:08,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [69878142] [2022-11-03 01:51:08,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [69878142] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:51:08,094 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:51:08,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 01:51:08,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236157980] [2022-11-03 01:51:08,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:51:08,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:51:08,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:51:08,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:51:08,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:51:08,095 INFO L87 Difference]: Start difference. First operand 561 states and 756 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:10,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:51:10,178 INFO L93 Difference]: Finished difference Result 2328 states and 3339 transitions. [2022-11-03 01:51:10,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 01:51:10,178 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 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 266 [2022-11-03 01:51:10,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:51:10,180 INFO L225 Difference]: With dead ends: 2328 [2022-11-03 01:51:10,180 INFO L226 Difference]: Without dead ends: 1923 [2022-11-03 01:51:10,180 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 01:51:10,181 INFO L413 NwaCegarLoop]: 526 mSDtfsCounter, 3825 mSDsluCounter, 4856 mSDsCounter, 0 mSdLazyCounter, 1495 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3825 SdHoareTripleChecker+Valid, 5382 SdHoareTripleChecker+Invalid, 1520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-03 01:51:10,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3825 Valid, 5382 Invalid, 1520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1495 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-03 01:51:10,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1923 states. [2022-11-03 01:51:10,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1923 to 565. [2022-11-03 01:51:10,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 565 states, 564 states have (on average 1.349290780141844) internal successors, (761), 564 states have internal predecessors, (761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:10,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 761 transitions. [2022-11-03 01:51:10,195 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 761 transitions. Word has length 266 [2022-11-03 01:51:10,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:51:10,196 INFO L495 AbstractCegarLoop]: Abstraction has 565 states and 761 transitions. [2022-11-03 01:51:10,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:10,196 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 761 transitions. [2022-11-03 01:51:10,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:51:10,197 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:51:10,197 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] [2022-11-03 01:51:10,226 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (67)] Ended with exit code 0 [2022-11-03 01:51:10,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:51:10,411 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:51:10,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:51:10,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1780778717, now seen corresponding path program 1 times [2022-11-03 01:51:10,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:51:10,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [538238299] [2022-11-03 01:51:10,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:51:10,412 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:51:10,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:51:10,413 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:51:10,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (68)] Waiting until timeout for monitored process [2022-11-03 01:51:11,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:51:11,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:51:11,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:51:11,790 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 01:51:11,791 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:51:11,791 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:51:11,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [538238299] [2022-11-03 01:51:11,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [538238299] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:51:11,791 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:51:11,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 01:51:11,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143970945] [2022-11-03 01:51:11,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:51:11,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:51:11,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:51:11,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:51:11,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:51:11,792 INFO L87 Difference]: Start difference. First operand 565 states and 761 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:13,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:51:13,884 INFO L93 Difference]: Finished difference Result 2340 states and 3353 transitions. [2022-11-03 01:51:13,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 01:51:13,884 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 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 266 [2022-11-03 01:51:13,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:51:13,886 INFO L225 Difference]: With dead ends: 2340 [2022-11-03 01:51:13,886 INFO L226 Difference]: Without dead ends: 1931 [2022-11-03 01:51:13,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 01:51:13,888 INFO L413 NwaCegarLoop]: 529 mSDtfsCounter, 3831 mSDsluCounter, 4855 mSDsCounter, 0 mSdLazyCounter, 1497 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3831 SdHoareTripleChecker+Valid, 5384 SdHoareTripleChecker+Invalid, 1522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-03 01:51:13,889 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3831 Valid, 5384 Invalid, 1522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1497 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-03 01:51:13,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1931 states. [2022-11-03 01:51:13,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1931 to 567. [2022-11-03 01:51:13,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 566 states have (on average 1.3480565371024735) internal successors, (763), 566 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:13,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 763 transitions. [2022-11-03 01:51:13,899 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 763 transitions. Word has length 266 [2022-11-03 01:51:13,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:51:13,899 INFO L495 AbstractCegarLoop]: Abstraction has 567 states and 763 transitions. [2022-11-03 01:51:13,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:13,899 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 763 transitions. [2022-11-03 01:51:13,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:51:13,900 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:51:13,900 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] [2022-11-03 01:51:13,921 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (68)] Ended with exit code 0 [2022-11-03 01:51:14,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:51:14,101 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:51:14,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:51:14,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1162803361, now seen corresponding path program 1 times [2022-11-03 01:51:14,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:51:14,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [344120459] [2022-11-03 01:51:14,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:51:14,103 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:51:14,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:51:14,104 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:51:14,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (69)] Waiting until timeout for monitored process [2022-11-03 01:51:14,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:51:14,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:51:14,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:51:15,473 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 01:51:15,473 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:51:15,473 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:51:15,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [344120459] [2022-11-03 01:51:15,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [344120459] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:51:15,473 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:51:15,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 01:51:15,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88400185] [2022-11-03 01:51:15,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:51:15,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:51:15,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:51:15,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:51:15,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:51:15,474 INFO L87 Difference]: Start difference. First operand 567 states and 763 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:17,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:51:17,566 INFO L93 Difference]: Finished difference Result 2350 states and 3364 transitions. [2022-11-03 01:51:17,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 01:51:17,566 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 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 266 [2022-11-03 01:51:17,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:51:17,569 INFO L225 Difference]: With dead ends: 2350 [2022-11-03 01:51:17,569 INFO L226 Difference]: Without dead ends: 1939 [2022-11-03 01:51:17,570 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 01:51:17,571 INFO L413 NwaCegarLoop]: 532 mSDtfsCounter, 3837 mSDsluCounter, 4854 mSDsCounter, 0 mSdLazyCounter, 1499 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3837 SdHoareTripleChecker+Valid, 5386 SdHoareTripleChecker+Invalid, 1524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-03 01:51:17,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3837 Valid, 5386 Invalid, 1524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1499 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-03 01:51:17,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1939 states. [2022-11-03 01:51:17,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1939 to 569. [2022-11-03 01:51:17,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569 states, 568 states have (on average 1.346830985915493) internal successors, (765), 568 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:17,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 765 transitions. [2022-11-03 01:51:17,588 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 765 transitions. Word has length 266 [2022-11-03 01:51:17,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:51:17,589 INFO L495 AbstractCegarLoop]: Abstraction has 569 states and 765 transitions. [2022-11-03 01:51:17,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:17,589 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 765 transitions. [2022-11-03 01:51:17,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:51:17,590 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:51:17,591 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] [2022-11-03 01:51:17,617 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (69)] Forceful destruction successful, exit code 0 [2022-11-03 01:51:17,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:51:17,810 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:51:17,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:51:17,811 INFO L85 PathProgramCache]: Analyzing trace with hash -2046312351, now seen corresponding path program 1 times [2022-11-03 01:51:17,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:51:17,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [825889237] [2022-11-03 01:51:17,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:51:17,813 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:51:17,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:51:17,814 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:51:17,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (70)] Waiting until timeout for monitored process [2022-11-03 01:51:18,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:51:18,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:51:18,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:51:19,193 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 01:51:19,194 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:51:19,194 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:51:19,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [825889237] [2022-11-03 01:51:19,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [825889237] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:51:19,194 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:51:19,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 01:51:19,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159239416] [2022-11-03 01:51:19,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:51:19,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:51:19,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:51:19,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:51:19,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:51:19,195 INFO L87 Difference]: Start difference. First operand 569 states and 765 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:21,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:51:21,285 INFO L93 Difference]: Finished difference Result 2360 states and 3375 transitions. [2022-11-03 01:51:21,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 01:51:21,286 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 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 266 [2022-11-03 01:51:21,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:51:21,288 INFO L225 Difference]: With dead ends: 2360 [2022-11-03 01:51:21,288 INFO L226 Difference]: Without dead ends: 1947 [2022-11-03 01:51:21,289 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 01:51:21,289 INFO L413 NwaCegarLoop]: 535 mSDtfsCounter, 3843 mSDsluCounter, 4853 mSDsCounter, 0 mSdLazyCounter, 1501 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3843 SdHoareTripleChecker+Valid, 5388 SdHoareTripleChecker+Invalid, 1526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-03 01:51:21,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3843 Valid, 5388 Invalid, 1526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1501 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-03 01:51:21,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1947 states. [2022-11-03 01:51:21,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1947 to 571. [2022-11-03 01:51:21,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 570 states have (on average 1.3456140350877193) internal successors, (767), 570 states have internal predecessors, (767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:21,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 767 transitions. [2022-11-03 01:51:21,304 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 767 transitions. Word has length 266 [2022-11-03 01:51:21,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:51:21,304 INFO L495 AbstractCegarLoop]: Abstraction has 571 states and 767 transitions. [2022-11-03 01:51:21,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:21,304 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 767 transitions. [2022-11-03 01:51:21,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:51:21,305 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:51:21,306 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] [2022-11-03 01:51:21,325 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (70)] Ended with exit code 0 [2022-11-03 01:51:21,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:51:21,506 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:51:21,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:51:21,507 INFO L85 PathProgramCache]: Analyzing trace with hash 308072931, now seen corresponding path program 1 times [2022-11-03 01:51:21,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:51:21,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1329562679] [2022-11-03 01:51:21,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:51:21,508 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:51:21,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:51:21,509 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:51:21,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (71)] Waiting until timeout for monitored process [2022-11-03 01:51:22,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:51:22,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:51:22,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:51:22,887 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 01:51:22,888 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:51:22,888 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:51:22,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1329562679] [2022-11-03 01:51:22,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1329562679] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:51:22,888 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:51:22,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 01:51:22,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850039138] [2022-11-03 01:51:22,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:51:22,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:51:22,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:51:22,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:51:22,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:51:22,889 INFO L87 Difference]: Start difference. First operand 571 states and 767 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:25,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:51:25,009 INFO L93 Difference]: Finished difference Result 2370 states and 3386 transitions. [2022-11-03 01:51:25,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 01:51:25,009 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 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 266 [2022-11-03 01:51:25,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:51:25,010 INFO L225 Difference]: With dead ends: 2370 [2022-11-03 01:51:25,011 INFO L226 Difference]: Without dead ends: 1955 [2022-11-03 01:51:25,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 01:51:25,011 INFO L413 NwaCegarLoop]: 538 mSDtfsCounter, 3849 mSDsluCounter, 4852 mSDsCounter, 0 mSdLazyCounter, 1503 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3849 SdHoareTripleChecker+Valid, 5390 SdHoareTripleChecker+Invalid, 1528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-03 01:51:25,011 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3849 Valid, 5390 Invalid, 1528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1503 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-03 01:51:25,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1955 states. [2022-11-03 01:51:25,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1955 to 573. [2022-11-03 01:51:25,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 572 states have (on average 1.3444055944055944) internal successors, (769), 572 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:25,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 769 transitions. [2022-11-03 01:51:25,021 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 769 transitions. Word has length 266 [2022-11-03 01:51:25,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:51:25,022 INFO L495 AbstractCegarLoop]: Abstraction has 573 states and 769 transitions. [2022-11-03 01:51:25,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:25,022 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 769 transitions. [2022-11-03 01:51:25,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:51:25,023 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:51:25,023 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] [2022-11-03 01:51:25,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (71)] Forceful destruction successful, exit code 0 [2022-11-03 01:51:25,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:51:25,223 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:51:25,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:51:25,224 INFO L85 PathProgramCache]: Analyzing trace with hash -462660635, now seen corresponding path program 1 times [2022-11-03 01:51:25,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:51:25,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1981190600] [2022-11-03 01:51:25,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:51:25,225 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:51:25,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:51:25,226 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:51:25,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (72)] Waiting until timeout for monitored process [2022-11-03 01:51:25,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:51:25,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:51:25,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:51:26,629 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 01:51:26,629 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:51:26,629 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:51:26,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1981190600] [2022-11-03 01:51:26,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1981190600] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:51:26,629 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:51:26,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 01:51:26,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944611769] [2022-11-03 01:51:26,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:51:26,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:51:26,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:51:26,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:51:26,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:51:26,631 INFO L87 Difference]: Start difference. First operand 573 states and 769 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:28,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:51:28,713 INFO L93 Difference]: Finished difference Result 2380 states and 3397 transitions. [2022-11-03 01:51:28,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 01:51:28,713 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 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 266 [2022-11-03 01:51:28,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:51:28,715 INFO L225 Difference]: With dead ends: 2380 [2022-11-03 01:51:28,715 INFO L226 Difference]: Without dead ends: 1963 [2022-11-03 01:51:28,716 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 01:51:28,716 INFO L413 NwaCegarLoop]: 541 mSDtfsCounter, 3855 mSDsluCounter, 4851 mSDsCounter, 0 mSdLazyCounter, 1505 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3855 SdHoareTripleChecker+Valid, 5392 SdHoareTripleChecker+Invalid, 1530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-03 01:51:28,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3855 Valid, 5392 Invalid, 1530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1505 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-03 01:51:28,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1963 states. [2022-11-03 01:51:28,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1963 to 575. [2022-11-03 01:51:28,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 1.343205574912892) internal successors, (771), 574 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:28,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 771 transitions. [2022-11-03 01:51:28,732 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 771 transitions. Word has length 266 [2022-11-03 01:51:28,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:51:28,732 INFO L495 AbstractCegarLoop]: Abstraction has 575 states and 771 transitions. [2022-11-03 01:51:28,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:28,733 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 771 transitions. [2022-11-03 01:51:28,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:51:28,734 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:51:28,734 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] [2022-11-03 01:51:28,759 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (72)] Ended with exit code 0 [2022-11-03 01:51:28,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:51:28,947 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:51:28,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:51:28,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1048936857, now seen corresponding path program 1 times [2022-11-03 01:51:28,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:51:28,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [550561039] [2022-11-03 01:51:28,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:51:28,949 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:51:28,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:51:28,951 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:51:28,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (73)] Waiting until timeout for monitored process [2022-11-03 01:51:29,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:51:29,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:51:29,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:51:30,386 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 01:51:30,387 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:51:30,387 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:51:30,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [550561039] [2022-11-03 01:51:30,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [550561039] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:51:30,387 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:51:30,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 01:51:30,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523105082] [2022-11-03 01:51:30,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:51:30,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:51:30,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:51:30,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:51:30,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:51:30,388 INFO L87 Difference]: Start difference. First operand 575 states and 771 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:32,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:51:32,532 INFO L93 Difference]: Finished difference Result 2398 states and 3420 transitions. [2022-11-03 01:51:32,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 01:51:32,533 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 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 266 [2022-11-03 01:51:32,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:51:32,535 INFO L225 Difference]: With dead ends: 2398 [2022-11-03 01:51:32,535 INFO L226 Difference]: Without dead ends: 1979 [2022-11-03 01:51:32,536 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 01:51:32,536 INFO L413 NwaCegarLoop]: 548 mSDtfsCounter, 3871 mSDsluCounter, 4850 mSDsCounter, 0 mSdLazyCounter, 1509 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3871 SdHoareTripleChecker+Valid, 5398 SdHoareTripleChecker+Invalid, 1534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-03 01:51:32,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3871 Valid, 5398 Invalid, 1534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1509 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-03 01:51:32,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1979 states. [2022-11-03 01:51:32,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1979 to 579. [2022-11-03 01:51:32,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579 states, 578 states have (on average 1.342560553633218) internal successors, (776), 578 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:32,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 776 transitions. [2022-11-03 01:51:32,553 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 776 transitions. Word has length 266 [2022-11-03 01:51:32,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:51:32,553 INFO L495 AbstractCegarLoop]: Abstraction has 579 states and 776 transitions. [2022-11-03 01:51:32,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:32,554 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 776 transitions. [2022-11-03 01:51:32,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:51:32,555 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:51:32,555 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] [2022-11-03 01:51:32,581 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (73)] Forceful destruction successful, exit code 0 [2022-11-03 01:51:32,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:51:32,778 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:51:32,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:51:32,778 INFO L85 PathProgramCache]: Analyzing trace with hash 275919337, now seen corresponding path program 1 times [2022-11-03 01:51:32,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:51:32,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1868124469] [2022-11-03 01:51:32,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:51:32,780 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:51:32,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:51:32,781 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:51:32,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (74)] Waiting until timeout for monitored process [2022-11-03 01:51:33,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:51:33,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:51:33,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:51:34,183 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 01:51:34,183 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:51:34,184 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:51:34,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1868124469] [2022-11-03 01:51:34,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1868124469] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:51:34,184 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:51:34,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 01:51:34,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154724818] [2022-11-03 01:51:34,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:51:34,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:51:34,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:51:34,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:51:34,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:51:34,186 INFO L87 Difference]: Start difference. First operand 579 states and 776 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:36,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:51:36,252 INFO L93 Difference]: Finished difference Result 2410 states and 3434 transitions. [2022-11-03 01:51:36,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 01:51:36,252 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 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 266 [2022-11-03 01:51:36,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:51:36,254 INFO L225 Difference]: With dead ends: 2410 [2022-11-03 01:51:36,254 INFO L226 Difference]: Without dead ends: 1987 [2022-11-03 01:51:36,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 01:51:36,255 INFO L413 NwaCegarLoop]: 551 mSDtfsCounter, 3877 mSDsluCounter, 4849 mSDsCounter, 0 mSdLazyCounter, 1511 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3877 SdHoareTripleChecker+Valid, 5400 SdHoareTripleChecker+Invalid, 1536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-03 01:51:36,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3877 Valid, 5400 Invalid, 1536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1511 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-03 01:51:36,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1987 states. [2022-11-03 01:51:36,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1987 to 581. [2022-11-03 01:51:36,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 581 states, 580 states have (on average 1.3413793103448275) internal successors, (778), 580 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:36,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 778 transitions. [2022-11-03 01:51:36,268 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 778 transitions. Word has length 266 [2022-11-03 01:51:36,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:51:36,269 INFO L495 AbstractCegarLoop]: Abstraction has 581 states and 778 transitions. [2022-11-03 01:51:36,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:36,269 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 778 transitions. [2022-11-03 01:51:36,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:51:36,270 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:51:36,270 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] [2022-11-03 01:51:36,288 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (74)] Ended with exit code 0 [2022-11-03 01:51:36,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:51:36,474 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:51:36,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:51:36,475 INFO L85 PathProgramCache]: Analyzing trace with hash -781918741, now seen corresponding path program 1 times [2022-11-03 01:51:36,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:51:36,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1344998663] [2022-11-03 01:51:36,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:51:36,476 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:51:36,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:51:36,477 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:51:36,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (75)] Waiting until timeout for monitored process [2022-11-03 01:51:37,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:51:37,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:51:37,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:51:37,865 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 01:51:37,865 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:51:37,865 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:51:37,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1344998663] [2022-11-03 01:51:37,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1344998663] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:51:37,865 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:51:37,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 01:51:37,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091520024] [2022-11-03 01:51:37,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:51:37,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:51:37,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:51:37,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:51:37,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:51:37,867 INFO L87 Difference]: Start difference. First operand 581 states and 778 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:39,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:51:39,953 INFO L93 Difference]: Finished difference Result 2420 states and 3445 transitions. [2022-11-03 01:51:39,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 01:51:39,953 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 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 266 [2022-11-03 01:51:39,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:51:39,955 INFO L225 Difference]: With dead ends: 2420 [2022-11-03 01:51:39,955 INFO L226 Difference]: Without dead ends: 1995 [2022-11-03 01:51:39,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 01:51:39,956 INFO L413 NwaCegarLoop]: 554 mSDtfsCounter, 3883 mSDsluCounter, 4848 mSDsCounter, 0 mSdLazyCounter, 1513 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3883 SdHoareTripleChecker+Valid, 5402 SdHoareTripleChecker+Invalid, 1538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-03 01:51:39,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3883 Valid, 5402 Invalid, 1538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1513 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-03 01:51:39,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1995 states. [2022-11-03 01:51:39,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1995 to 583. [2022-11-03 01:51:39,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 582 states have (on average 1.3402061855670102) internal successors, (780), 582 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:39,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 780 transitions. [2022-11-03 01:51:39,983 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 780 transitions. Word has length 266 [2022-11-03 01:51:39,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:51:39,984 INFO L495 AbstractCegarLoop]: Abstraction has 583 states and 780 transitions. [2022-11-03 01:51:39,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:39,984 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 780 transitions. [2022-11-03 01:51:39,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:51:39,985 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:51:39,986 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] [2022-11-03 01:51:40,011 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (75)] Ended with exit code 0 [2022-11-03 01:51:40,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:51:40,204 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:51:40,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:51:40,205 INFO L85 PathProgramCache]: Analyzing trace with hash -541678995, now seen corresponding path program 1 times [2022-11-03 01:51:40,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:51:40,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1195072563] [2022-11-03 01:51:40,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:51:40,206 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:51:40,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:51:40,208 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:51:40,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (76)] Waiting until timeout for monitored process [2022-11-03 01:51:40,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:51:40,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:51:40,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:51:41,583 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 01:51:41,583 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:51:41,583 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:51:41,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1195072563] [2022-11-03 01:51:41,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1195072563] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:51:41,584 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:51:41,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 01:51:41,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416633424] [2022-11-03 01:51:41,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:51:41,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:51:41,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:51:41,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:51:41,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:51:41,585 INFO L87 Difference]: Start difference. First operand 583 states and 780 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:43,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:51:43,674 INFO L93 Difference]: Finished difference Result 2430 states and 3456 transitions. [2022-11-03 01:51:43,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 01:51:43,675 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 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 266 [2022-11-03 01:51:43,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:51:43,676 INFO L225 Difference]: With dead ends: 2430 [2022-11-03 01:51:43,677 INFO L226 Difference]: Without dead ends: 2003 [2022-11-03 01:51:43,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 01:51:43,678 INFO L413 NwaCegarLoop]: 557 mSDtfsCounter, 3889 mSDsluCounter, 4847 mSDsCounter, 0 mSdLazyCounter, 1515 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3889 SdHoareTripleChecker+Valid, 5404 SdHoareTripleChecker+Invalid, 1540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-03 01:51:43,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3889 Valid, 5404 Invalid, 1540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1515 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-03 01:51:43,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2003 states. [2022-11-03 01:51:43,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2003 to 585. [2022-11-03 01:51:43,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 584 states have (on average 1.3390410958904109) internal successors, (782), 584 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:43,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 782 transitions. [2022-11-03 01:51:43,690 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 782 transitions. Word has length 266 [2022-11-03 01:51:43,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:51:43,690 INFO L495 AbstractCegarLoop]: Abstraction has 585 states and 782 transitions. [2022-11-03 01:51:43,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:43,690 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 782 transitions. [2022-11-03 01:51:43,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:51:43,692 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:51:43,692 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] [2022-11-03 01:51:43,715 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (76)] Ended with exit code 0 [2022-11-03 01:51:43,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:51:43,893 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:51:43,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:51:43,893 INFO L85 PathProgramCache]: Analyzing trace with hash -514613393, now seen corresponding path program 1 times [2022-11-03 01:51:43,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:51:43,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2002198276] [2022-11-03 01:51:43,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:51:43,894 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:51:43,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:51:43,896 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:51:43,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (77)] Waiting until timeout for monitored process [2022-11-03 01:51:44,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:51:44,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:51:44,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:51:45,305 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 01:51:45,305 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:51:45,306 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:51:45,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2002198276] [2022-11-03 01:51:45,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2002198276] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:51:45,306 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:51:45,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 01:51:45,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903141645] [2022-11-03 01:51:45,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:51:45,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:51:45,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:51:45,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:51:45,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:51:45,307 INFO L87 Difference]: Start difference. First operand 585 states and 782 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:47,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:51:47,429 INFO L93 Difference]: Finished difference Result 2440 states and 3467 transitions. [2022-11-03 01:51:47,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 01:51:47,430 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 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 266 [2022-11-03 01:51:47,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:51:47,432 INFO L225 Difference]: With dead ends: 2440 [2022-11-03 01:51:47,432 INFO L226 Difference]: Without dead ends: 2011 [2022-11-03 01:51:47,433 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 01:51:47,433 INFO L413 NwaCegarLoop]: 560 mSDtfsCounter, 3895 mSDsluCounter, 4846 mSDsCounter, 0 mSdLazyCounter, 1517 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3895 SdHoareTripleChecker+Valid, 5406 SdHoareTripleChecker+Invalid, 1542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-03 01:51:47,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3895 Valid, 5406 Invalid, 1542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1517 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-03 01:51:47,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2011 states. [2022-11-03 01:51:47,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2011 to 587. [2022-11-03 01:51:47,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 586 states have (on average 1.3378839590443685) internal successors, (784), 586 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:47,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 784 transitions. [2022-11-03 01:51:47,452 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 784 transitions. Word has length 266 [2022-11-03 01:51:47,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:51:47,452 INFO L495 AbstractCegarLoop]: Abstraction has 587 states and 784 transitions. [2022-11-03 01:51:47,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:47,452 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 784 transitions. [2022-11-03 01:51:47,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:51:47,454 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:51:47,454 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] [2022-11-03 01:51:47,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (77)] Forceful destruction successful, exit code 0 [2022-11-03 01:51:47,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:51:47,679 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:51:47,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:51:47,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1219491057, now seen corresponding path program 1 times [2022-11-03 01:51:47,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:51:47,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [232262700] [2022-11-03 01:51:47,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:51:47,681 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:51:47,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:51:47,682 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:51:47,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (78)] Waiting until timeout for monitored process [2022-11-03 01:51:48,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:51:48,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:51:48,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:51:49,084 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 01:51:49,084 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:51:49,084 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:51:49,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [232262700] [2022-11-03 01:51:49,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [232262700] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:51:49,085 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:51:49,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 01:51:49,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993956724] [2022-11-03 01:51:49,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:51:49,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:51:49,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:51:49,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:51:49,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:51:49,086 INFO L87 Difference]: Start difference. First operand 587 states and 784 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:51,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:51:51,158 INFO L93 Difference]: Finished difference Result 2450 states and 3478 transitions. [2022-11-03 01:51:51,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 01:51:51,159 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 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 266 [2022-11-03 01:51:51,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:51:51,160 INFO L225 Difference]: With dead ends: 2450 [2022-11-03 01:51:51,160 INFO L226 Difference]: Without dead ends: 2019 [2022-11-03 01:51:51,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 01:51:51,161 INFO L413 NwaCegarLoop]: 563 mSDtfsCounter, 3901 mSDsluCounter, 4845 mSDsCounter, 0 mSdLazyCounter, 1519 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3901 SdHoareTripleChecker+Valid, 5408 SdHoareTripleChecker+Invalid, 1544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-03 01:51:51,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3901 Valid, 5408 Invalid, 1544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1519 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-03 01:51:51,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2019 states. [2022-11-03 01:51:51,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2019 to 589. [2022-11-03 01:51:51,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 589 states, 588 states have (on average 1.336734693877551) internal successors, (786), 588 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:51,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 786 transitions. [2022-11-03 01:51:51,176 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 786 transitions. Word has length 266 [2022-11-03 01:51:51,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:51:51,177 INFO L495 AbstractCegarLoop]: Abstraction has 589 states and 786 transitions. [2022-11-03 01:51:51,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:51,177 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 786 transitions. [2022-11-03 01:51:51,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:51:51,179 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:51:51,179 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] [2022-11-03 01:51:51,204 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (78)] Ended with exit code 0 [2022-11-03 01:51:51,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:51:51,394 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:51:51,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:51:51,394 INFO L85 PathProgramCache]: Analyzing trace with hash -691551501, now seen corresponding path program 1 times [2022-11-03 01:51:51,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:51:51,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [687147533] [2022-11-03 01:51:51,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:51:51,396 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:51:51,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:51:51,397 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:51:51,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (79)] Waiting until timeout for monitored process [2022-11-03 01:51:52,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:51:52,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:51:52,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:51:52,806 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 01:51:52,806 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:51:52,806 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:51:52,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [687147533] [2022-11-03 01:51:52,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [687147533] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:51:52,807 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:51:52,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 01:51:52,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617054051] [2022-11-03 01:51:52,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:51:52,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:51:52,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:51:52,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:51:52,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:51:52,808 INFO L87 Difference]: Start difference. First operand 589 states and 786 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:54,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:51:54,893 INFO L93 Difference]: Finished difference Result 2460 states and 3489 transitions. [2022-11-03 01:51:54,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 01:51:54,893 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 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 266 [2022-11-03 01:51:54,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:51:54,895 INFO L225 Difference]: With dead ends: 2460 [2022-11-03 01:51:54,895 INFO L226 Difference]: Without dead ends: 2027 [2022-11-03 01:51:54,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 01:51:54,896 INFO L413 NwaCegarLoop]: 566 mSDtfsCounter, 3907 mSDsluCounter, 4844 mSDsCounter, 0 mSdLazyCounter, 1521 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3907 SdHoareTripleChecker+Valid, 5410 SdHoareTripleChecker+Invalid, 1546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-03 01:51:54,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3907 Valid, 5410 Invalid, 1546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1521 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-03 01:51:54,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2027 states. [2022-11-03 01:51:54,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2027 to 591. [2022-11-03 01:51:54,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 590 states have (on average 1.335593220338983) internal successors, (788), 590 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:54,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 788 transitions. [2022-11-03 01:51:54,909 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 788 transitions. Word has length 266 [2022-11-03 01:51:54,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:51:54,910 INFO L495 AbstractCegarLoop]: Abstraction has 591 states and 788 transitions. [2022-11-03 01:51:54,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:54,910 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 788 transitions. [2022-11-03 01:51:54,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:51:54,911 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:51:54,911 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] [2022-11-03 01:51:54,933 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (79)] Ended with exit code 0 [2022-11-03 01:51:55,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:51:55,112 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:51:55,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:51:55,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1658902155, now seen corresponding path program 1 times [2022-11-03 01:51:55,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:51:55,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1154073311] [2022-11-03 01:51:55,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:51:55,114 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:51:55,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:51:55,115 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:51:55,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (80)] Waiting until timeout for monitored process [2022-11-03 01:51:55,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:51:55,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:51:55,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:51:56,509 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 01:51:56,510 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:51:56,510 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:51:56,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1154073311] [2022-11-03 01:51:56,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1154073311] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:51:56,510 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:51:56,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 01:51:56,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830514449] [2022-11-03 01:51:56,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:51:56,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 01:51:56,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:51:56,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 01:51:56,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 01:51:56,512 INFO L87 Difference]: Start difference. First operand 591 states and 788 transitions. Second operand has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:58,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:51:58,237 INFO L93 Difference]: Finished difference Result 2246 states and 3179 transitions. [2022-11-03 01:51:58,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 01:51:58,237 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 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 266 [2022-11-03 01:51:58,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:51:58,239 INFO L225 Difference]: With dead ends: 2246 [2022-11-03 01:51:58,239 INFO L226 Difference]: Without dead ends: 1811 [2022-11-03 01:51:58,239 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2022-11-03 01:51:58,240 INFO L413 NwaCegarLoop]: 569 mSDtfsCounter, 3279 mSDsluCounter, 3654 mSDsCounter, 0 mSdLazyCounter, 1207 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3279 SdHoareTripleChecker+Valid, 4223 SdHoareTripleChecker+Invalid, 1225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:51:58,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3279 Valid, 4223 Invalid, 1225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1207 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-03 01:51:58,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1811 states. [2022-11-03 01:51:58,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1811 to 593. [2022-11-03 01:51:58,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 592 states have (on average 1.3344594594594594) internal successors, (790), 592 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:58,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 790 transitions. [2022-11-03 01:51:58,257 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 790 transitions. Word has length 266 [2022-11-03 01:51:58,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:51:58,257 INFO L495 AbstractCegarLoop]: Abstraction has 593 states and 790 transitions. [2022-11-03 01:51:58,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:58,257 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 790 transitions. [2022-11-03 01:51:58,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:51:58,259 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:51:58,259 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] [2022-11-03 01:51:58,290 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (80)] Forceful destruction successful, exit code 0 [2022-11-03 01:51:58,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:51:58,472 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:51:58,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:51:58,472 INFO L85 PathProgramCache]: Analyzing trace with hash 2143438967, now seen corresponding path program 1 times [2022-11-03 01:51:58,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:51:58,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [232831586] [2022-11-03 01:51:58,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:51:58,474 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:51:58,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:51:58,474 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:51:58,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (81)] Waiting until timeout for monitored process [2022-11-03 01:51:59,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:51:59,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:51:59,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:51:59,911 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 01:51:59,911 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:51:59,911 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:51:59,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [232831586] [2022-11-03 01:51:59,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [232831586] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:51:59,911 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:51:59,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 01:51:59,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921263481] [2022-11-03 01:51:59,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:51:59,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:51:59,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:51:59,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:51:59,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:51:59,913 INFO L87 Difference]: Start difference. First operand 593 states and 790 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:01,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:52:01,997 INFO L93 Difference]: Finished difference Result 2392 states and 3393 transitions. [2022-11-03 01:52:01,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 01:52:01,998 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 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 266 [2022-11-03 01:52:01,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:52:02,000 INFO L225 Difference]: With dead ends: 2392 [2022-11-03 01:52:02,000 INFO L226 Difference]: Without dead ends: 1955 [2022-11-03 01:52:02,000 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 01:52:02,001 INFO L413 NwaCegarLoop]: 576 mSDtfsCounter, 3771 mSDsluCounter, 4810 mSDsCounter, 0 mSdLazyCounter, 1511 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3771 SdHoareTripleChecker+Valid, 5386 SdHoareTripleChecker+Invalid, 1536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-03 01:52:02,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3771 Valid, 5386 Invalid, 1536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1511 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-03 01:52:02,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1955 states. [2022-11-03 01:52:02,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1955 to 597. [2022-11-03 01:52:02,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 597 states, 596 states have (on average 1.3338926174496644) internal successors, (795), 596 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:02,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 795 transitions. [2022-11-03 01:52:02,011 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 795 transitions. Word has length 266 [2022-11-03 01:52:02,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:52:02,011 INFO L495 AbstractCegarLoop]: Abstraction has 597 states and 795 transitions. [2022-11-03 01:52:02,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:02,011 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 795 transitions. [2022-11-03 01:52:02,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:52:02,012 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:02,013 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] [2022-11-03 01:52:02,033 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (81)] Ended with exit code 0 [2022-11-03 01:52:02,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:52:02,213 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:52:02,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:02,214 INFO L85 PathProgramCache]: Analyzing trace with hash 457259129, now seen corresponding path program 1 times [2022-11-03 01:52:02,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:52:02,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [840355016] [2022-11-03 01:52:02,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:02,215 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:52:02,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:52:02,216 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:52:02,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (82)] Waiting until timeout for monitored process [2022-11-03 01:52:02,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:02,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:52:02,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:03,661 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 01:52:03,661 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:52:03,661 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:52:03,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [840355016] [2022-11-03 01:52:03,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [840355016] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:52:03,661 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:52:03,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 01:52:03,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016228389] [2022-11-03 01:52:03,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:52:03,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:52:03,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:52:03,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:52:03,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:52:03,663 INFO L87 Difference]: Start difference. First operand 597 states and 795 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:05,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:52:05,713 INFO L93 Difference]: Finished difference Result 2404 states and 3407 transitions. [2022-11-03 01:52:05,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 01:52:05,713 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 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 266 [2022-11-03 01:52:05,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:52:05,714 INFO L225 Difference]: With dead ends: 2404 [2022-11-03 01:52:05,714 INFO L226 Difference]: Without dead ends: 1963 [2022-11-03 01:52:05,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 01:52:05,715 INFO L413 NwaCegarLoop]: 579 mSDtfsCounter, 3777 mSDsluCounter, 4809 mSDsCounter, 0 mSdLazyCounter, 1513 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3777 SdHoareTripleChecker+Valid, 5388 SdHoareTripleChecker+Invalid, 1538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-03 01:52:05,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3777 Valid, 5388 Invalid, 1538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1513 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-03 01:52:05,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1963 states. [2022-11-03 01:52:05,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1963 to 599. [2022-11-03 01:52:05,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 598 states have (on average 1.3327759197324414) internal successors, (797), 598 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:05,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 797 transitions. [2022-11-03 01:52:05,725 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 797 transitions. Word has length 266 [2022-11-03 01:52:05,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:52:05,726 INFO L495 AbstractCegarLoop]: Abstraction has 599 states and 797 transitions. [2022-11-03 01:52:05,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:05,726 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 797 transitions. [2022-11-03 01:52:05,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:52:05,727 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:05,727 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] [2022-11-03 01:52:05,751 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (82)] Ended with exit code 0 [2022-11-03 01:52:05,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:52:05,928 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:52:05,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:05,928 INFO L85 PathProgramCache]: Analyzing trace with hash 39862523, now seen corresponding path program 1 times [2022-11-03 01:52:05,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:52:05,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1221178846] [2022-11-03 01:52:05,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:05,930 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:52:05,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:52:05,931 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:52:05,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (83)] Waiting until timeout for monitored process [2022-11-03 01:52:06,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:06,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:52:06,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:07,408 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 01:52:07,408 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:52:07,408 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:52:07,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1221178846] [2022-11-03 01:52:07,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1221178846] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:52:07,408 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:52:07,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 01:52:07,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699289145] [2022-11-03 01:52:07,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:52:07,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:52:07,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:52:07,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:52:07,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:52:07,410 INFO L87 Difference]: Start difference. First operand 599 states and 797 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:09,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:52:09,464 INFO L93 Difference]: Finished difference Result 2414 states and 3418 transitions. [2022-11-03 01:52:09,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 01:52:09,464 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 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 266 [2022-11-03 01:52:09,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:52:09,466 INFO L225 Difference]: With dead ends: 2414 [2022-11-03 01:52:09,466 INFO L226 Difference]: Without dead ends: 1971 [2022-11-03 01:52:09,467 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 01:52:09,467 INFO L413 NwaCegarLoop]: 582 mSDtfsCounter, 3783 mSDsluCounter, 4808 mSDsCounter, 0 mSdLazyCounter, 1515 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3783 SdHoareTripleChecker+Valid, 5390 SdHoareTripleChecker+Invalid, 1540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-03 01:52:09,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3783 Valid, 5390 Invalid, 1540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1515 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-03 01:52:09,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1971 states. [2022-11-03 01:52:09,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1971 to 601. [2022-11-03 01:52:09,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 600 states have (on average 1.3316666666666668) internal successors, (799), 600 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:09,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 799 transitions. [2022-11-03 01:52:09,479 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 799 transitions. Word has length 266 [2022-11-03 01:52:09,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:52:09,479 INFO L495 AbstractCegarLoop]: Abstraction has 601 states and 799 transitions. [2022-11-03 01:52:09,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:09,479 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 799 transitions. [2022-11-03 01:52:09,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:52:09,480 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:09,481 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] [2022-11-03 01:52:09,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (83)] Forceful destruction successful, exit code 0 [2022-11-03 01:52:09,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:52:09,686 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:52:09,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:09,686 INFO L85 PathProgramCache]: Analyzing trace with hash 2001437181, now seen corresponding path program 1 times [2022-11-03 01:52:09,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:52:09,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2016256206] [2022-11-03 01:52:09,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:09,688 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:52:09,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:52:09,689 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:52:09,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (84)] Waiting until timeout for monitored process [2022-11-03 01:52:10,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:10,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:52:10,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:11,117 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 01:52:11,117 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:52:11,117 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:52:11,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2016256206] [2022-11-03 01:52:11,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2016256206] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:52:11,118 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:52:11,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 01:52:11,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352723653] [2022-11-03 01:52:11,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:52:11,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:52:11,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:52:11,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:52:11,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:52:11,119 INFO L87 Difference]: Start difference. First operand 601 states and 799 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:13,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:52:13,162 INFO L93 Difference]: Finished difference Result 2424 states and 3429 transitions. [2022-11-03 01:52:13,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 01:52:13,162 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 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 266 [2022-11-03 01:52:13,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:52:13,164 INFO L225 Difference]: With dead ends: 2424 [2022-11-03 01:52:13,164 INFO L226 Difference]: Without dead ends: 1979 [2022-11-03 01:52:13,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 01:52:13,165 INFO L413 NwaCegarLoop]: 585 mSDtfsCounter, 3789 mSDsluCounter, 4807 mSDsCounter, 0 mSdLazyCounter, 1517 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3789 SdHoareTripleChecker+Valid, 5392 SdHoareTripleChecker+Invalid, 1542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-03 01:52:13,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3789 Valid, 5392 Invalid, 1542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1517 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-03 01:52:13,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1979 states. [2022-11-03 01:52:13,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1979 to 603. [2022-11-03 01:52:13,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 603 states, 602 states have (on average 1.330564784053156) internal successors, (801), 602 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:13,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 801 transitions. [2022-11-03 01:52:13,183 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 801 transitions. Word has length 266 [2022-11-03 01:52:13,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:52:13,183 INFO L495 AbstractCegarLoop]: Abstraction has 603 states and 801 transitions. [2022-11-03 01:52:13,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:13,183 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 801 transitions. [2022-11-03 01:52:13,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:52:13,185 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:13,185 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] [2022-11-03 01:52:13,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (84)] Forceful destruction successful, exit code 0 [2022-11-03 01:52:13,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:52:13,409 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:52:13,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:13,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1732830337, now seen corresponding path program 1 times [2022-11-03 01:52:13,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:52:13,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1840141331] [2022-11-03 01:52:13,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:13,411 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:52:13,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:52:13,412 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:52:13,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (85)] Waiting until timeout for monitored process [2022-11-03 01:52:14,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:14,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:52:14,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:14,878 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 01:52:14,878 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:52:14,879 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:52:14,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1840141331] [2022-11-03 01:52:14,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1840141331] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:52:14,879 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:52:14,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 01:52:14,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141250006] [2022-11-03 01:52:14,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:52:14,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:52:14,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:52:14,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:52:14,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:52:14,880 INFO L87 Difference]: Start difference. First operand 603 states and 801 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:16,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:52:16,952 INFO L93 Difference]: Finished difference Result 2434 states and 3440 transitions. [2022-11-03 01:52:16,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 01:52:16,953 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 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 266 [2022-11-03 01:52:16,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:52:16,954 INFO L225 Difference]: With dead ends: 2434 [2022-11-03 01:52:16,954 INFO L226 Difference]: Without dead ends: 1987 [2022-11-03 01:52:16,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 01:52:16,955 INFO L413 NwaCegarLoop]: 588 mSDtfsCounter, 3795 mSDsluCounter, 4806 mSDsCounter, 0 mSdLazyCounter, 1519 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3795 SdHoareTripleChecker+Valid, 5394 SdHoareTripleChecker+Invalid, 1544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-03 01:52:16,955 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3795 Valid, 5394 Invalid, 1544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1519 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-03 01:52:16,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1987 states. [2022-11-03 01:52:16,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1987 to 605. [2022-11-03 01:52:16,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 604 states have (on average 1.3294701986754967) internal successors, (803), 604 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:16,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 803 transitions. [2022-11-03 01:52:16,966 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 803 transitions. Word has length 266 [2022-11-03 01:52:16,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:52:16,966 INFO L495 AbstractCegarLoop]: Abstraction has 605 states and 803 transitions. [2022-11-03 01:52:16,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:16,966 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 803 transitions. [2022-11-03 01:52:16,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:52:16,967 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:16,968 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] [2022-11-03 01:52:16,989 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (85)] Ended with exit code 0 [2022-11-03 01:52:17,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:52:17,168 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:52:17,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:17,168 INFO L85 PathProgramCache]: Analyzing trace with hash -471913087, now seen corresponding path program 1 times [2022-11-03 01:52:17,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:52:17,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [36823692] [2022-11-03 01:52:17,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:17,170 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:52:17,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:52:17,172 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:52:17,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (86)] Waiting until timeout for monitored process [2022-11-03 01:52:17,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:17,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:52:17,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:18,634 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 01:52:18,634 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:52:18,634 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:52:18,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [36823692] [2022-11-03 01:52:18,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [36823692] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:52:18,634 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:52:18,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 01:52:18,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116121541] [2022-11-03 01:52:18,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:52:18,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:52:18,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:52:18,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:52:18,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:52:18,636 INFO L87 Difference]: Start difference. First operand 605 states and 803 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:20,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:52:20,813 INFO L93 Difference]: Finished difference Result 2444 states and 3451 transitions. [2022-11-03 01:52:20,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 01:52:20,814 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 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 266 [2022-11-03 01:52:20,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:52:20,816 INFO L225 Difference]: With dead ends: 2444 [2022-11-03 01:52:20,816 INFO L226 Difference]: Without dead ends: 1995 [2022-11-03 01:52:20,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 01:52:20,817 INFO L413 NwaCegarLoop]: 591 mSDtfsCounter, 3801 mSDsluCounter, 4805 mSDsCounter, 0 mSdLazyCounter, 1521 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3801 SdHoareTripleChecker+Valid, 5396 SdHoareTripleChecker+Invalid, 1546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-03 01:52:20,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3801 Valid, 5396 Invalid, 1546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1521 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-03 01:52:20,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1995 states. [2022-11-03 01:52:20,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1995 to 607. [2022-11-03 01:52:20,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 606 states have (on average 1.3283828382838283) internal successors, (805), 606 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:20,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 805 transitions. [2022-11-03 01:52:20,828 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 805 transitions. Word has length 266 [2022-11-03 01:52:20,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:52:20,828 INFO L495 AbstractCegarLoop]: Abstraction has 607 states and 805 transitions. [2022-11-03 01:52:20,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:20,829 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 805 transitions. [2022-11-03 01:52:20,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:52:20,830 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:20,830 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] [2022-11-03 01:52:20,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (86)] Forceful destruction successful, exit code 0 [2022-11-03 01:52:21,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:52:21,034 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:52:21,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:21,034 INFO L85 PathProgramCache]: Analyzing trace with hash 914872323, now seen corresponding path program 1 times [2022-11-03 01:52:21,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:52:21,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [671920572] [2022-11-03 01:52:21,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:21,036 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:52:21,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:52:21,037 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:52:21,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (87)] Waiting until timeout for monitored process [2022-11-03 01:52:21,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:21,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:52:21,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:22,482 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 01:52:22,483 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:52:22,483 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:52:22,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [671920572] [2022-11-03 01:52:22,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [671920572] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:52:22,483 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:52:22,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 01:52:22,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038216882] [2022-11-03 01:52:22,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:52:22,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:52:22,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:52:22,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:52:22,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:52:22,485 INFO L87 Difference]: Start difference. First operand 607 states and 805 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:24,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:52:24,528 INFO L93 Difference]: Finished difference Result 2462 states and 3474 transitions. [2022-11-03 01:52:24,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 01:52:24,529 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 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 266 [2022-11-03 01:52:24,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:52:24,530 INFO L225 Difference]: With dead ends: 2462 [2022-11-03 01:52:24,530 INFO L226 Difference]: Without dead ends: 2011 [2022-11-03 01:52:24,531 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 01:52:24,531 INFO L413 NwaCegarLoop]: 598 mSDtfsCounter, 3817 mSDsluCounter, 4804 mSDsCounter, 0 mSdLazyCounter, 1525 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3817 SdHoareTripleChecker+Valid, 5402 SdHoareTripleChecker+Invalid, 1550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-03 01:52:24,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3817 Valid, 5402 Invalid, 1550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1525 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-03 01:52:24,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2011 states. [2022-11-03 01:52:24,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2011 to 611. [2022-11-03 01:52:24,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 611 states, 610 states have (on average 1.3278688524590163) internal successors, (810), 610 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:24,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 611 states to 611 states and 810 transitions. [2022-11-03 01:52:24,545 INFO L78 Accepts]: Start accepts. Automaton has 611 states and 810 transitions. Word has length 266 [2022-11-03 01:52:24,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:52:24,546 INFO L495 AbstractCegarLoop]: Abstraction has 611 states and 810 transitions. [2022-11-03 01:52:24,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:24,546 INFO L276 IsEmpty]: Start isEmpty. Operand 611 states and 810 transitions. [2022-11-03 01:52:24,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:52:24,547 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:24,547 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] [2022-11-03 01:52:24,566 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (87)] Forceful destruction successful, exit code 0 [2022-11-03 01:52:24,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:52:24,748 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:52:24,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:24,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1113713787, now seen corresponding path program 1 times [2022-11-03 01:52:24,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:52:24,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [770617864] [2022-11-03 01:52:24,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:24,750 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:52:24,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:52:24,750 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:52:24,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (88)] Waiting until timeout for monitored process [2022-11-03 01:52:25,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:25,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:52:25,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:26,230 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 01:52:26,230 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:52:26,230 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:52:26,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [770617864] [2022-11-03 01:52:26,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [770617864] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:52:26,231 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:52:26,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 01:52:26,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299868616] [2022-11-03 01:52:26,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:52:26,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:52:26,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:52:26,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:52:26,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:52:26,232 INFO L87 Difference]: Start difference. First operand 611 states and 810 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:28,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:52:28,303 INFO L93 Difference]: Finished difference Result 2474 states and 3488 transitions. [2022-11-03 01:52:28,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 01:52:28,304 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 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 266 [2022-11-03 01:52:28,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:52:28,306 INFO L225 Difference]: With dead ends: 2474 [2022-11-03 01:52:28,306 INFO L226 Difference]: Without dead ends: 2019 [2022-11-03 01:52:28,307 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 01:52:28,307 INFO L413 NwaCegarLoop]: 601 mSDtfsCounter, 3823 mSDsluCounter, 4803 mSDsCounter, 0 mSdLazyCounter, 1527 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3823 SdHoareTripleChecker+Valid, 5404 SdHoareTripleChecker+Invalid, 1552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-03 01:52:28,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3823 Valid, 5404 Invalid, 1552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1527 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-03 01:52:28,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2019 states. [2022-11-03 01:52:28,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2019 to 613. [2022-11-03 01:52:28,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 613 states, 612 states have (on average 1.326797385620915) internal successors, (812), 612 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:28,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 613 states to 613 states and 812 transitions. [2022-11-03 01:52:28,319 INFO L78 Accepts]: Start accepts. Automaton has 613 states and 812 transitions. Word has length 266 [2022-11-03 01:52:28,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:52:28,320 INFO L495 AbstractCegarLoop]: Abstraction has 613 states and 812 transitions. [2022-11-03 01:52:28,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:28,320 INFO L276 IsEmpty]: Start isEmpty. Operand 613 states and 812 transitions. [2022-11-03 01:52:28,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:52:28,321 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:28,321 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] [2022-11-03 01:52:28,344 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (88)] Ended with exit code 0 [2022-11-03 01:52:28,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:52:28,522 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:52:28,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:28,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1129232505, now seen corresponding path program 1 times [2022-11-03 01:52:28,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:52:28,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [483705875] [2022-11-03 01:52:28,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:28,524 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:52:28,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:52:28,524 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:52:28,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (89)] Waiting until timeout for monitored process [2022-11-03 01:52:29,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:29,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:52:29,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:30,002 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 01:52:30,002 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:52:30,002 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:52:30,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [483705875] [2022-11-03 01:52:30,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [483705875] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:52:30,002 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:52:30,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 01:52:30,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551803622] [2022-11-03 01:52:30,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:52:30,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:52:30,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:52:30,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:52:30,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:52:30,004 INFO L87 Difference]: Start difference. First operand 613 states and 812 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:32,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:52:32,087 INFO L93 Difference]: Finished difference Result 2484 states and 3499 transitions. [2022-11-03 01:52:32,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 01:52:32,088 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 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 266 [2022-11-03 01:52:32,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:52:32,089 INFO L225 Difference]: With dead ends: 2484 [2022-11-03 01:52:32,090 INFO L226 Difference]: Without dead ends: 2027 [2022-11-03 01:52:32,090 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 01:52:32,090 INFO L413 NwaCegarLoop]: 604 mSDtfsCounter, 3829 mSDsluCounter, 4802 mSDsCounter, 0 mSdLazyCounter, 1529 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3829 SdHoareTripleChecker+Valid, 5406 SdHoareTripleChecker+Invalid, 1554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-03 01:52:32,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3829 Valid, 5406 Invalid, 1554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1529 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-03 01:52:32,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2027 states. [2022-11-03 01:52:32,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2027 to 615. [2022-11-03 01:52:32,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 615 states, 614 states have (on average 1.3257328990228012) internal successors, (814), 614 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:32,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 814 transitions. [2022-11-03 01:52:32,101 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 814 transitions. Word has length 266 [2022-11-03 01:52:32,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:52:32,102 INFO L495 AbstractCegarLoop]: Abstraction has 615 states and 814 transitions. [2022-11-03 01:52:32,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:32,102 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 814 transitions. [2022-11-03 01:52:32,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:52:32,103 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:32,103 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] [2022-11-03 01:52:32,127 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (89)] Ended with exit code 0 [2022-11-03 01:52:32,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:52:32,304 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:52:32,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:32,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1482320887, now seen corresponding path program 1 times [2022-11-03 01:52:32,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:52:32,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [131305751] [2022-11-03 01:52:32,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:32,306 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:52:32,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:52:32,307 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:52:32,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (90)] Waiting until timeout for monitored process [2022-11-03 01:52:33,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:33,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:52:33,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:33,794 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 01:52:33,794 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:52:33,794 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:52:33,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [131305751] [2022-11-03 01:52:33,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [131305751] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:52:33,794 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:52:33,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 01:52:33,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797165084] [2022-11-03 01:52:33,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:52:33,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:52:33,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:52:33,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:52:33,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:52:33,796 INFO L87 Difference]: Start difference. First operand 615 states and 814 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:35,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:52:35,850 INFO L93 Difference]: Finished difference Result 2494 states and 3510 transitions. [2022-11-03 01:52:35,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 01:52:35,851 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 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 266 [2022-11-03 01:52:35,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:52:35,853 INFO L225 Difference]: With dead ends: 2494 [2022-11-03 01:52:35,853 INFO L226 Difference]: Without dead ends: 2035 [2022-11-03 01:52:35,854 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 01:52:35,854 INFO L413 NwaCegarLoop]: 607 mSDtfsCounter, 3835 mSDsluCounter, 4801 mSDsCounter, 0 mSdLazyCounter, 1531 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3835 SdHoareTripleChecker+Valid, 5408 SdHoareTripleChecker+Invalid, 1556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-03 01:52:35,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3835 Valid, 5408 Invalid, 1556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1531 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-03 01:52:35,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2035 states. [2022-11-03 01:52:35,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2035 to 617. [2022-11-03 01:52:35,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 617 states, 616 states have (on average 1.3246753246753247) internal successors, (816), 616 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:35,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 816 transitions. [2022-11-03 01:52:35,867 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 816 transitions. Word has length 266 [2022-11-03 01:52:35,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:52:35,867 INFO L495 AbstractCegarLoop]: Abstraction has 617 states and 816 transitions. [2022-11-03 01:52:35,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:35,867 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 816 transitions. [2022-11-03 01:52:35,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:52:35,869 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:35,869 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] [2022-11-03 01:52:35,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (90)] Forceful destruction successful, exit code 0 [2022-11-03 01:52:36,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:52:36,069 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:52:36,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:36,070 INFO L85 PathProgramCache]: Analyzing trace with hash -588834549, now seen corresponding path program 1 times [2022-11-03 01:52:36,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:52:36,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1258946080] [2022-11-03 01:52:36,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:36,071 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:52:36,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:52:36,072 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:52:36,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (91)] Waiting until timeout for monitored process [2022-11-03 01:52:36,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:36,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:52:36,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:37,568 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 01:52:37,568 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:52:37,569 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:52:37,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1258946080] [2022-11-03 01:52:37,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1258946080] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:52:37,569 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:52:37,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 01:52:37,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560160696] [2022-11-03 01:52:37,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:52:37,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:52:37,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:52:37,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:52:37,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:52:37,570 INFO L87 Difference]: Start difference. First operand 617 states and 816 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:39,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:52:39,647 INFO L93 Difference]: Finished difference Result 2504 states and 3521 transitions. [2022-11-03 01:52:39,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 01:52:39,647 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 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 266 [2022-11-03 01:52:39,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:52:39,649 INFO L225 Difference]: With dead ends: 2504 [2022-11-03 01:52:39,649 INFO L226 Difference]: Without dead ends: 2043 [2022-11-03 01:52:39,650 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 01:52:39,650 INFO L413 NwaCegarLoop]: 610 mSDtfsCounter, 3841 mSDsluCounter, 4800 mSDsCounter, 0 mSdLazyCounter, 1533 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3841 SdHoareTripleChecker+Valid, 5410 SdHoareTripleChecker+Invalid, 1558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-03 01:52:39,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3841 Valid, 5410 Invalid, 1558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1533 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-03 01:52:39,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2043 states. [2022-11-03 01:52:39,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2043 to 619. [2022-11-03 01:52:39,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 619 states, 618 states have (on average 1.3236245954692556) internal successors, (818), 618 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:39,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 818 transitions. [2022-11-03 01:52:39,665 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 818 transitions. Word has length 266 [2022-11-03 01:52:39,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:52:39,665 INFO L495 AbstractCegarLoop]: Abstraction has 619 states and 818 transitions. [2022-11-03 01:52:39,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:39,666 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 818 transitions. [2022-11-03 01:52:39,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:52:39,667 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:39,667 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] [2022-11-03 01:52:39,688 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (91)] Ended with exit code 0 [2022-11-03 01:52:39,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:52:39,867 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:52:39,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:39,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1486227827, now seen corresponding path program 1 times [2022-11-03 01:52:39,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:52:39,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [351853145] [2022-11-03 01:52:39,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:39,869 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:52:39,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:52:39,870 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:52:39,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (92)] Waiting until timeout for monitored process [2022-11-03 01:52:40,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:40,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:52:40,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:41,368 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 01:52:41,369 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:52:41,369 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:52:41,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [351853145] [2022-11-03 01:52:41,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [351853145] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:52:41,369 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:52:41,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 01:52:41,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275703591] [2022-11-03 01:52:41,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:52:41,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:52:41,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:52:41,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:52:41,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:52:41,370 INFO L87 Difference]: Start difference. First operand 619 states and 818 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:43,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:52:43,463 INFO L93 Difference]: Finished difference Result 2514 states and 3532 transitions. [2022-11-03 01:52:43,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 01:52:43,464 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 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 266 [2022-11-03 01:52:43,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:52:43,465 INFO L225 Difference]: With dead ends: 2514 [2022-11-03 01:52:43,466 INFO L226 Difference]: Without dead ends: 2051 [2022-11-03 01:52:43,466 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 01:52:43,467 INFO L413 NwaCegarLoop]: 613 mSDtfsCounter, 3847 mSDsluCounter, 4799 mSDsCounter, 0 mSdLazyCounter, 1535 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3847 SdHoareTripleChecker+Valid, 5412 SdHoareTripleChecker+Invalid, 1560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-03 01:52:43,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3847 Valid, 5412 Invalid, 1560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1535 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-03 01:52:43,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2051 states. [2022-11-03 01:52:43,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2051 to 621. [2022-11-03 01:52:43,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 621 states, 620 states have (on average 1.3225806451612903) internal successors, (820), 620 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:43,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 820 transitions. [2022-11-03 01:52:43,481 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 820 transitions. Word has length 266 [2022-11-03 01:52:43,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:52:43,481 INFO L495 AbstractCegarLoop]: Abstraction has 621 states and 820 transitions. [2022-11-03 01:52:43,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:43,481 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 820 transitions. [2022-11-03 01:52:43,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:52:43,482 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:43,483 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] [2022-11-03 01:52:43,507 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (92)] Ended with exit code 0 [2022-11-03 01:52:43,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:52:43,683 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:52:43,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:43,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1062581105, now seen corresponding path program 1 times [2022-11-03 01:52:43,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:52:43,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1661787611] [2022-11-03 01:52:43,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:43,685 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:52:43,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:52:43,686 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:52:43,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (93)] Waiting until timeout for monitored process [2022-11-03 01:52:44,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:44,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:52:44,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:45,180 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 01:52:45,181 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:52:45,181 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:52:45,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1661787611] [2022-11-03 01:52:45,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1661787611] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:52:45,181 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:52:45,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 01:52:45,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675431159] [2022-11-03 01:52:45,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:52:45,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:52:45,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:52:45,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:52:45,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:52:45,182 INFO L87 Difference]: Start difference. First operand 621 states and 820 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:47,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:52:47,364 INFO L93 Difference]: Finished difference Result 2524 states and 3543 transitions. [2022-11-03 01:52:47,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 01:52:47,365 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 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 266 [2022-11-03 01:52:47,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:52:47,366 INFO L225 Difference]: With dead ends: 2524 [2022-11-03 01:52:47,366 INFO L226 Difference]: Without dead ends: 2059 [2022-11-03 01:52:47,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 01:52:47,367 INFO L413 NwaCegarLoop]: 616 mSDtfsCounter, 3853 mSDsluCounter, 4798 mSDsCounter, 0 mSdLazyCounter, 1537 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3853 SdHoareTripleChecker+Valid, 5414 SdHoareTripleChecker+Invalid, 1562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-03 01:52:47,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3853 Valid, 5414 Invalid, 1562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1537 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-03 01:52:47,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2059 states. [2022-11-03 01:52:47,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2059 to 623. [2022-11-03 01:52:47,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 623 states, 622 states have (on average 1.3215434083601285) internal successors, (822), 622 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:47,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 822 transitions. [2022-11-03 01:52:47,379 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 822 transitions. Word has length 266 [2022-11-03 01:52:47,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:52:47,379 INFO L495 AbstractCegarLoop]: Abstraction has 623 states and 822 transitions. [2022-11-03 01:52:47,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:47,379 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 822 transitions. [2022-11-03 01:52:47,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:52:47,380 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:47,380 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] [2022-11-03 01:52:47,405 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (93)] Ended with exit code 0 [2022-11-03 01:52:47,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:52:47,581 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:52:47,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:47,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1387019025, now seen corresponding path program 1 times [2022-11-03 01:52:47,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:52:47,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1108495870] [2022-11-03 01:52:47,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:47,583 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:52:47,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:52:47,584 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:52:47,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (94)] Waiting until timeout for monitored process [2022-11-03 01:52:48,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:48,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:52:48,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:49,077 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 01:52:49,077 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:52:49,077 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:52:49,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1108495870] [2022-11-03 01:52:49,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1108495870] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:52:49,077 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:52:49,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 01:52:49,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224731450] [2022-11-03 01:52:49,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:52:49,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 01:52:49,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:52:49,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 01:52:49,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 01:52:49,079 INFO L87 Difference]: Start difference. First operand 623 states and 822 transitions. Second operand has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:50,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:52:50,863 INFO L93 Difference]: Finished difference Result 2310 states and 3233 transitions. [2022-11-03 01:52:50,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 01:52:50,863 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 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 266 [2022-11-03 01:52:50,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:52:50,865 INFO L225 Difference]: With dead ends: 2310 [2022-11-03 01:52:50,865 INFO L226 Difference]: Without dead ends: 1843 [2022-11-03 01:52:50,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2022-11-03 01:52:50,866 INFO L413 NwaCegarLoop]: 619 mSDtfsCounter, 3239 mSDsluCounter, 3672 mSDsCounter, 0 mSdLazyCounter, 1255 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3239 SdHoareTripleChecker+Valid, 4291 SdHoareTripleChecker+Invalid, 1273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-03 01:52:50,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3239 Valid, 4291 Invalid, 1273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1255 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-03 01:52:50,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1843 states. [2022-11-03 01:52:50,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1843 to 625. [2022-11-03 01:52:50,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 625 states, 624 states have (on average 1.3205128205128205) internal successors, (824), 624 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:50,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 824 transitions. [2022-11-03 01:52:50,877 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 824 transitions. Word has length 266 [2022-11-03 01:52:50,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:52:50,878 INFO L495 AbstractCegarLoop]: Abstraction has 625 states and 824 transitions. [2022-11-03 01:52:50,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:50,878 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 824 transitions. [2022-11-03 01:52:50,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:52:50,879 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:50,879 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] [2022-11-03 01:52:50,898 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (94)] Ended with exit code 0 [2022-11-03 01:52:51,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:52:51,079 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:52:51,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:51,080 INFO L85 PathProgramCache]: Analyzing trace with hash 2046550547, now seen corresponding path program 1 times [2022-11-03 01:52:51,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:52:51,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [810314989] [2022-11-03 01:52:51,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:51,081 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:52:51,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:52:51,082 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:52:51,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (95)] Waiting until timeout for monitored process [2022-11-03 01:52:51,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:51,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:52:51,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:52,592 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 01:52:52,592 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:52:52,593 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:52:52,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [810314989] [2022-11-03 01:52:52,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [810314989] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:52:52,593 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:52:52,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 01:52:52,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105810323] [2022-11-03 01:52:52,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:52:52,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:52:52,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:52:52,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:52:52,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:52:52,594 INFO L87 Difference]: Start difference. First operand 625 states and 824 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:54,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:52:54,701 INFO L93 Difference]: Finished difference Result 2456 states and 3447 transitions. [2022-11-03 01:52:54,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 01:52:54,702 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 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 266 [2022-11-03 01:52:54,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:52:54,704 INFO L225 Difference]: With dead ends: 2456 [2022-11-03 01:52:54,704 INFO L226 Difference]: Without dead ends: 1987 [2022-11-03 01:52:54,705 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 01:52:54,705 INFO L413 NwaCegarLoop]: 626 mSDtfsCounter, 3717 mSDsluCounter, 4764 mSDsCounter, 0 mSdLazyCounter, 1527 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3717 SdHoareTripleChecker+Valid, 5390 SdHoareTripleChecker+Invalid, 1552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-03 01:52:54,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3717 Valid, 5390 Invalid, 1552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1527 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-03 01:52:54,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1987 states. [2022-11-03 01:52:54,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1987 to 629. [2022-11-03 01:52:54,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 628 states have (on average 1.320063694267516) internal successors, (829), 628 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:54,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 829 transitions. [2022-11-03 01:52:54,719 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 829 transitions. Word has length 266 [2022-11-03 01:52:54,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:52:54,719 INFO L495 AbstractCegarLoop]: Abstraction has 629 states and 829 transitions. [2022-11-03 01:52:54,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:54,719 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 829 transitions. [2022-11-03 01:52:54,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:52:54,720 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:54,720 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] [2022-11-03 01:52:54,745 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (95)] Ended with exit code 0 [2022-11-03 01:52:54,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:52:54,921 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:52:54,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:54,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1974163989, now seen corresponding path program 1 times [2022-11-03 01:52:54,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:52:54,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [3161759] [2022-11-03 01:52:54,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:54,923 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:52:54,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:52:54,925 INFO L229 MonitoredProcess]: Starting monitored process 96 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:52:54,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (96)] Waiting until timeout for monitored process [2022-11-03 01:52:55,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:55,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:52:55,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:56,490 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 01:52:56,490 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:52:56,491 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:52:56,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [3161759] [2022-11-03 01:52:56,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [3161759] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:52:56,491 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:52:56,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 01:52:56,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059330423] [2022-11-03 01:52:56,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:52:56,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:52:56,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:52:56,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:52:56,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:52:56,492 INFO L87 Difference]: Start difference. First operand 629 states and 829 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:58,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:52:58,568 INFO L93 Difference]: Finished difference Result 2468 states and 3461 transitions. [2022-11-03 01:52:58,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 01:52:58,568 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 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 266 [2022-11-03 01:52:58,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:52:58,570 INFO L225 Difference]: With dead ends: 2468 [2022-11-03 01:52:58,570 INFO L226 Difference]: Without dead ends: 1995 [2022-11-03 01:52:58,571 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 01:52:58,571 INFO L413 NwaCegarLoop]: 629 mSDtfsCounter, 3723 mSDsluCounter, 4763 mSDsCounter, 0 mSdLazyCounter, 1529 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3723 SdHoareTripleChecker+Valid, 5392 SdHoareTripleChecker+Invalid, 1554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-03 01:52:58,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3723 Valid, 5392 Invalid, 1554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1529 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-03 01:52:58,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1995 states. [2022-11-03 01:52:58,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1995 to 631. [2022-11-03 01:52:58,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 631 states, 630 states have (on average 1.319047619047619) internal successors, (831), 630 states have internal predecessors, (831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:58,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 631 states to 631 states and 831 transitions. [2022-11-03 01:52:58,583 INFO L78 Accepts]: Start accepts. Automaton has 631 states and 831 transitions. Word has length 266 [2022-11-03 01:52:58,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:52:58,583 INFO L495 AbstractCegarLoop]: Abstraction has 631 states and 831 transitions. [2022-11-03 01:52:58,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:58,583 INFO L276 IsEmpty]: Start isEmpty. Operand 631 states and 831 transitions. [2022-11-03 01:52:58,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:52:58,584 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:58,584 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] [2022-11-03 01:52:58,609 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (96)] Ended with exit code 0 [2022-11-03 01:52:58,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:52:58,785 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:52:58,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:58,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1619203433, now seen corresponding path program 1 times [2022-11-03 01:52:58,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:52:58,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [628258570] [2022-11-03 01:52:58,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:58,787 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:52:58,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:52:58,788 INFO L229 MonitoredProcess]: Starting monitored process 97 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:52:58,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (97)] Waiting until timeout for monitored process [2022-11-03 01:52:59,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:59,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:52:59,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:53:00,341 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 01:53:00,342 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:53:00,342 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:53:00,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [628258570] [2022-11-03 01:53:00,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [628258570] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:53:00,342 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:53:00,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 01:53:00,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103617332] [2022-11-03 01:53:00,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:53:00,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:53:00,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:53:00,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:53:00,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:53:00,344 INFO L87 Difference]: Start difference. First operand 631 states and 831 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:02,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:53:02,459 INFO L93 Difference]: Finished difference Result 2478 states and 3472 transitions. [2022-11-03 01:53:02,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 01:53:02,460 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 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 266 [2022-11-03 01:53:02,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:53:02,462 INFO L225 Difference]: With dead ends: 2478 [2022-11-03 01:53:02,462 INFO L226 Difference]: Without dead ends: 2003 [2022-11-03 01:53:02,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 01:53:02,463 INFO L413 NwaCegarLoop]: 632 mSDtfsCounter, 3729 mSDsluCounter, 4762 mSDsCounter, 0 mSdLazyCounter, 1531 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3729 SdHoareTripleChecker+Valid, 5394 SdHoareTripleChecker+Invalid, 1556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-03 01:53:02,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3729 Valid, 5394 Invalid, 1556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1531 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-03 01:53:02,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2003 states. [2022-11-03 01:53:02,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2003 to 633. [2022-11-03 01:53:02,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 633 states, 632 states have (on average 1.3180379746835442) internal successors, (833), 632 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:02,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 833 transitions. [2022-11-03 01:53:02,475 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 833 transitions. Word has length 266 [2022-11-03 01:53:02,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:53:02,475 INFO L495 AbstractCegarLoop]: Abstraction has 633 states and 833 transitions. [2022-11-03 01:53:02,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:02,475 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 833 transitions. [2022-11-03 01:53:02,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:53:02,476 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:53:02,476 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] [2022-11-03 01:53:02,500 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (97)] Ended with exit code 0 [2022-11-03 01:53:02,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:53:02,677 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:53:02,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:53:02,677 INFO L85 PathProgramCache]: Analyzing trace with hash -233000039, now seen corresponding path program 1 times [2022-11-03 01:53:02,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:53:02,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1565891897] [2022-11-03 01:53:02,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:02,679 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:53:02,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:53:02,679 INFO L229 MonitoredProcess]: Starting monitored process 98 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:53:02,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (98)] Waiting until timeout for monitored process [2022-11-03 01:53:03,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:03,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:53:03,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:53:04,241 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 01:53:04,241 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:53:04,241 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:53:04,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1565891897] [2022-11-03 01:53:04,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1565891897] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:53:04,241 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:53:04,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 01:53:04,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12412118] [2022-11-03 01:53:04,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:53:04,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:53:04,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:53:04,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:53:04,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:53:04,243 INFO L87 Difference]: Start difference. First operand 633 states and 833 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:06,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:53:06,336 INFO L93 Difference]: Finished difference Result 2488 states and 3483 transitions. [2022-11-03 01:53:06,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 01:53:06,336 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 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 266 [2022-11-03 01:53:06,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:53:06,338 INFO L225 Difference]: With dead ends: 2488 [2022-11-03 01:53:06,338 INFO L226 Difference]: Without dead ends: 2011 [2022-11-03 01:53:06,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 01:53:06,339 INFO L413 NwaCegarLoop]: 635 mSDtfsCounter, 3735 mSDsluCounter, 4761 mSDsCounter, 0 mSdLazyCounter, 1533 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3735 SdHoareTripleChecker+Valid, 5396 SdHoareTripleChecker+Invalid, 1558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-03 01:53:06,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3735 Valid, 5396 Invalid, 1558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1533 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-03 01:53:06,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2011 states. [2022-11-03 01:53:06,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2011 to 635. [2022-11-03 01:53:06,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 634 states have (on average 1.3170347003154574) internal successors, (835), 634 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:06,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 835 transitions. [2022-11-03 01:53:06,350 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 835 transitions. Word has length 266 [2022-11-03 01:53:06,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:53:06,351 INFO L495 AbstractCegarLoop]: Abstraction has 635 states and 835 transitions. [2022-11-03 01:53:06,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:06,351 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 835 transitions. [2022-11-03 01:53:06,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:53:06,352 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:53:06,352 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] [2022-11-03 01:53:06,376 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (98)] Ended with exit code 0 [2022-11-03 01:53:06,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:53:06,552 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:53:06,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:53:06,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1690227995, now seen corresponding path program 1 times [2022-11-03 01:53:06,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:53:06,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1361246851] [2022-11-03 01:53:06,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:06,562 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:53:06,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:53:06,563 INFO L229 MonitoredProcess]: Starting monitored process 99 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:53:06,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (99)] Waiting until timeout for monitored process [2022-11-03 01:53:07,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:07,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:53:07,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:53:08,106 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 01:53:08,107 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:53:08,107 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:53:08,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1361246851] [2022-11-03 01:53:08,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1361246851] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:53:08,107 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:53:08,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 01:53:08,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744218424] [2022-11-03 01:53:08,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:53:08,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:53:08,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:53:08,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:53:08,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:53:08,108 INFO L87 Difference]: Start difference. First operand 635 states and 835 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:10,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:53:10,201 INFO L93 Difference]: Finished difference Result 2498 states and 3494 transitions. [2022-11-03 01:53:10,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 01:53:10,202 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 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 266 [2022-11-03 01:53:10,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:53:10,203 INFO L225 Difference]: With dead ends: 2498 [2022-11-03 01:53:10,204 INFO L226 Difference]: Without dead ends: 2019 [2022-11-03 01:53:10,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 01:53:10,205 INFO L413 NwaCegarLoop]: 638 mSDtfsCounter, 3741 mSDsluCounter, 4760 mSDsCounter, 0 mSdLazyCounter, 1535 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3741 SdHoareTripleChecker+Valid, 5398 SdHoareTripleChecker+Invalid, 1560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-03 01:53:10,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3741 Valid, 5398 Invalid, 1560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1535 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-03 01:53:10,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2019 states. [2022-11-03 01:53:10,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2019 to 637. [2022-11-03 01:53:10,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 636 states have (on average 1.3160377358490567) internal successors, (837), 636 states have internal predecessors, (837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:10,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 837 transitions. [2022-11-03 01:53:10,218 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 837 transitions. Word has length 266 [2022-11-03 01:53:10,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:53:10,219 INFO L495 AbstractCegarLoop]: Abstraction has 637 states and 837 transitions. [2022-11-03 01:53:10,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:10,219 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 837 transitions. [2022-11-03 01:53:10,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:53:10,220 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:53:10,220 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] [2022-11-03 01:53:10,241 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (99)] Ended with exit code 0 [2022-11-03 01:53:10,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:53:10,421 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:53:10,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:53:10,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1830776605, now seen corresponding path program 1 times [2022-11-03 01:53:10,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:53:10,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [104804359] [2022-11-03 01:53:10,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:10,423 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:53:10,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:53:10,424 INFO L229 MonitoredProcess]: Starting monitored process 100 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:53:10,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (100)] Waiting until timeout for monitored process [2022-11-03 01:53:11,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:11,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:53:11,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:53:11,955 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 01:53:11,955 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:53:11,955 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:53:11,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [104804359] [2022-11-03 01:53:11,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [104804359] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:53:11,955 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:53:11,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 01:53:11,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110500653] [2022-11-03 01:53:11,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:53:11,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:53:11,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:53:11,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:53:11,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:53:11,957 INFO L87 Difference]: Start difference. First operand 637 states and 837 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:14,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:53:14,035 INFO L93 Difference]: Finished difference Result 2508 states and 3505 transitions. [2022-11-03 01:53:14,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 01:53:14,035 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 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 266 [2022-11-03 01:53:14,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:53:14,037 INFO L225 Difference]: With dead ends: 2508 [2022-11-03 01:53:14,037 INFO L226 Difference]: Without dead ends: 2027 [2022-11-03 01:53:14,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 01:53:14,038 INFO L413 NwaCegarLoop]: 641 mSDtfsCounter, 3747 mSDsluCounter, 4759 mSDsCounter, 0 mSdLazyCounter, 1537 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3747 SdHoareTripleChecker+Valid, 5400 SdHoareTripleChecker+Invalid, 1562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-03 01:53:14,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3747 Valid, 5400 Invalid, 1562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1537 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-03 01:53:14,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2027 states. [2022-11-03 01:53:14,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2027 to 639. [2022-11-03 01:53:14,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 638 states have (on average 1.3150470219435737) internal successors, (839), 638 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:14,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 839 transitions. [2022-11-03 01:53:14,051 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 839 transitions. Word has length 266 [2022-11-03 01:53:14,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:53:14,051 INFO L495 AbstractCegarLoop]: Abstraction has 639 states and 839 transitions. [2022-11-03 01:53:14,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:14,052 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 839 transitions. [2022-11-03 01:53:14,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:53:14,053 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:53:14,053 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] [2022-11-03 01:53:14,079 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (100)] Forceful destruction successful, exit code 0 [2022-11-03 01:53:14,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:53:14,258 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:53:14,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:53:14,258 INFO L85 PathProgramCache]: Analyzing trace with hash 25338271, now seen corresponding path program 1 times [2022-11-03 01:53:14,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:53:14,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1440570820] [2022-11-03 01:53:14,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:14,260 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:53:14,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:53:14,263 INFO L229 MonitoredProcess]: Starting monitored process 101 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:53:14,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (101)] Waiting until timeout for monitored process [2022-11-03 01:53:14,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:15,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:53:15,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:53:15,811 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 01:53:15,811 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:53:15,811 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:53:15,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1440570820] [2022-11-03 01:53:15,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1440570820] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:53:15,811 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:53:15,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 01:53:15,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336422124] [2022-11-03 01:53:15,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:53:15,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:53:15,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:53:15,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:53:15,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:53:15,812 INFO L87 Difference]: Start difference. First operand 639 states and 839 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:17,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:53:17,913 INFO L93 Difference]: Finished difference Result 2526 states and 3528 transitions. [2022-11-03 01:53:17,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 01:53:17,913 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 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 266 [2022-11-03 01:53:17,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:53:17,914 INFO L225 Difference]: With dead ends: 2526 [2022-11-03 01:53:17,914 INFO L226 Difference]: Without dead ends: 2043 [2022-11-03 01:53:17,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 01:53:17,915 INFO L413 NwaCegarLoop]: 648 mSDtfsCounter, 3763 mSDsluCounter, 4758 mSDsCounter, 0 mSdLazyCounter, 1541 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3763 SdHoareTripleChecker+Valid, 5406 SdHoareTripleChecker+Invalid, 1566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-03 01:53:17,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3763 Valid, 5406 Invalid, 1566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1541 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-03 01:53:17,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2043 states. [2022-11-03 01:53:17,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2043 to 643. [2022-11-03 01:53:17,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 643 states, 642 states have (on average 1.3146417445482865) internal successors, (844), 642 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:17,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 844 transitions. [2022-11-03 01:53:17,929 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 844 transitions. Word has length 266 [2022-11-03 01:53:17,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:53:17,930 INFO L495 AbstractCegarLoop]: Abstraction has 643 states and 844 transitions. [2022-11-03 01:53:17,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:17,930 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 844 transitions. [2022-11-03 01:53:17,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:53:17,931 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:53:17,931 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] [2022-11-03 01:53:17,952 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (101)] Ended with exit code 0 [2022-11-03 01:53:18,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:53:18,132 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:53:18,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:53:18,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1663605471, now seen corresponding path program 1 times [2022-11-03 01:53:18,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:53:18,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1457606482] [2022-11-03 01:53:18,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:18,133 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:53:18,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:53:18,134 INFO L229 MonitoredProcess]: Starting monitored process 102 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:53:18,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (102)] Waiting until timeout for monitored process [2022-11-03 01:53:18,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:18,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:53:18,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:53:19,710 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 01:53:19,710 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:53:19,710 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:53:19,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1457606482] [2022-11-03 01:53:19,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1457606482] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:53:19,711 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:53:19,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 01:53:19,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31909287] [2022-11-03 01:53:19,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:53:19,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:53:19,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:53:19,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:53:19,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:53:19,713 INFO L87 Difference]: Start difference. First operand 643 states and 844 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:21,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:53:21,810 INFO L93 Difference]: Finished difference Result 2538 states and 3542 transitions. [2022-11-03 01:53:21,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 01:53:21,811 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 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 266 [2022-11-03 01:53:21,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:53:21,812 INFO L225 Difference]: With dead ends: 2538 [2022-11-03 01:53:21,812 INFO L226 Difference]: Without dead ends: 2051 [2022-11-03 01:53:21,813 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 01:53:21,813 INFO L413 NwaCegarLoop]: 651 mSDtfsCounter, 3769 mSDsluCounter, 4757 mSDsCounter, 0 mSdLazyCounter, 1543 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3769 SdHoareTripleChecker+Valid, 5408 SdHoareTripleChecker+Invalid, 1568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-03 01:53:21,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3769 Valid, 5408 Invalid, 1568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1543 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-03 01:53:21,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2051 states. [2022-11-03 01:53:21,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2051 to 645. [2022-11-03 01:53:21,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 644 states have (on average 1.313664596273292) internal successors, (846), 644 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:21,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 846 transitions. [2022-11-03 01:53:21,830 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 846 transitions. Word has length 266 [2022-11-03 01:53:21,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:53:21,830 INFO L495 AbstractCegarLoop]: Abstraction has 645 states and 846 transitions. [2022-11-03 01:53:21,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:21,830 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 846 transitions. [2022-11-03 01:53:21,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:53:21,831 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:53:21,832 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] [2022-11-03 01:53:21,853 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (102)] Ended with exit code 0 [2022-11-03 01:53:22,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:53:22,038 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:53:22,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:53:22,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1043013923, now seen corresponding path program 1 times [2022-11-03 01:53:22,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:53:22,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [732339666] [2022-11-03 01:53:22,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:22,040 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:53:22,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:53:22,044 INFO L229 MonitoredProcess]: Starting monitored process 103 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:53:22,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (103)] Waiting until timeout for monitored process [2022-11-03 01:53:22,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:22,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:53:22,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:53:23,656 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 01:53:23,656 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:53:23,656 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:53:23,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [732339666] [2022-11-03 01:53:23,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [732339666] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:53:23,657 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:53:23,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 01:53:23,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595867687] [2022-11-03 01:53:23,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:53:23,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:53:23,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:53:23,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:53:23,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:53:23,658 INFO L87 Difference]: Start difference. First operand 645 states and 846 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:25,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:53:25,797 INFO L93 Difference]: Finished difference Result 2548 states and 3553 transitions. [2022-11-03 01:53:25,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 01:53:25,798 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 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 266 [2022-11-03 01:53:25,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:53:25,800 INFO L225 Difference]: With dead ends: 2548 [2022-11-03 01:53:25,800 INFO L226 Difference]: Without dead ends: 2059 [2022-11-03 01:53:25,801 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 01:53:25,801 INFO L413 NwaCegarLoop]: 654 mSDtfsCounter, 3775 mSDsluCounter, 4756 mSDsCounter, 0 mSdLazyCounter, 1545 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3775 SdHoareTripleChecker+Valid, 5410 SdHoareTripleChecker+Invalid, 1570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-03 01:53:25,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3775 Valid, 5410 Invalid, 1570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1545 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-03 01:53:25,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2059 states. [2022-11-03 01:53:25,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2059 to 647. [2022-11-03 01:53:25,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647 states, 646 states have (on average 1.3126934984520124) internal successors, (848), 646 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:25,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 848 transitions. [2022-11-03 01:53:25,824 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 848 transitions. Word has length 266 [2022-11-03 01:53:25,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:53:25,824 INFO L495 AbstractCegarLoop]: Abstraction has 647 states and 848 transitions. [2022-11-03 01:53:25,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:25,825 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 848 transitions. [2022-11-03 01:53:25,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:53:25,826 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:53:25,826 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] [2022-11-03 01:53:25,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (103)] Forceful destruction successful, exit code 0 [2022-11-03 01:53:26,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:53:26,030 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:53:26,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:53:26,030 INFO L85 PathProgramCache]: Analyzing trace with hash -236849755, now seen corresponding path program 1 times [2022-11-03 01:53:26,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:53:26,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [242273216] [2022-11-03 01:53:26,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:26,032 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:53:26,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:53:26,033 INFO L229 MonitoredProcess]: Starting monitored process 104 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:53:26,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (104)] Waiting until timeout for monitored process [2022-11-03 01:53:26,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:26,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:53:26,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:53:27,664 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 01:53:27,664 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:53:27,665 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:53:27,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [242273216] [2022-11-03 01:53:27,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [242273216] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:53:27,665 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:53:27,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 01:53:27,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860879726] [2022-11-03 01:53:27,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:53:27,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:53:27,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:53:27,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:53:27,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:53:27,666 INFO L87 Difference]: Start difference. First operand 647 states and 848 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:29,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:53:29,771 INFO L93 Difference]: Finished difference Result 2558 states and 3564 transitions. [2022-11-03 01:53:29,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 01:53:29,772 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 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 266 [2022-11-03 01:53:29,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:53:29,774 INFO L225 Difference]: With dead ends: 2558 [2022-11-03 01:53:29,774 INFO L226 Difference]: Without dead ends: 2067 [2022-11-03 01:53:29,774 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 01:53:29,775 INFO L413 NwaCegarLoop]: 657 mSDtfsCounter, 3781 mSDsluCounter, 4755 mSDsCounter, 0 mSdLazyCounter, 1547 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3781 SdHoareTripleChecker+Valid, 5412 SdHoareTripleChecker+Invalid, 1572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-03 01:53:29,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3781 Valid, 5412 Invalid, 1572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1547 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-03 01:53:29,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2067 states. [2022-11-03 01:53:29,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2067 to 649. [2022-11-03 01:53:29,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 649 states, 648 states have (on average 1.3117283950617284) internal successors, (850), 648 states have internal predecessors, (850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:29,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 850 transitions. [2022-11-03 01:53:29,787 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 850 transitions. Word has length 266 [2022-11-03 01:53:29,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:53:29,788 INFO L495 AbstractCegarLoop]: Abstraction has 649 states and 850 transitions. [2022-11-03 01:53:29,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:29,788 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 850 transitions. [2022-11-03 01:53:29,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:53:29,789 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:53:29,789 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] [2022-11-03 01:53:29,812 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (104)] Forceful destruction successful, exit code 0 [2022-11-03 01:53:29,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:53:29,994 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:53:29,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:53:29,994 INFO L85 PathProgramCache]: Analyzing trace with hash -823655769, now seen corresponding path program 1 times [2022-11-03 01:53:29,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:53:29,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1705767046] [2022-11-03 01:53:29,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:29,996 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:53:29,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:53:29,996 INFO L229 MonitoredProcess]: Starting monitored process 105 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:53:30,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (105)] Waiting until timeout for monitored process [2022-11-03 01:53:30,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:30,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:53:30,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:53:31,607 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 01:53:31,607 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:53:31,607 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:53:31,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1705767046] [2022-11-03 01:53:31,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1705767046] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:53:31,607 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:53:31,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 01:53:31,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168030089] [2022-11-03 01:53:31,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:53:31,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:53:31,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:53:31,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:53:31,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:53:31,609 INFO L87 Difference]: Start difference. First operand 649 states and 850 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:33,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:53:33,761 INFO L93 Difference]: Finished difference Result 2568 states and 3575 transitions. [2022-11-03 01:53:33,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 01:53:33,761 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 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 266 [2022-11-03 01:53:33,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:53:33,763 INFO L225 Difference]: With dead ends: 2568 [2022-11-03 01:53:33,763 INFO L226 Difference]: Without dead ends: 2075 [2022-11-03 01:53:33,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 01:53:33,764 INFO L413 NwaCegarLoop]: 660 mSDtfsCounter, 3787 mSDsluCounter, 4754 mSDsCounter, 0 mSdLazyCounter, 1549 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3787 SdHoareTripleChecker+Valid, 5414 SdHoareTripleChecker+Invalid, 1574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-03 01:53:33,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3787 Valid, 5414 Invalid, 1574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1549 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-03 01:53:33,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2075 states. [2022-11-03 01:53:33,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2075 to 651. [2022-11-03 01:53:33,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 651 states, 650 states have (on average 1.3107692307692307) internal successors, (852), 650 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:33,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 852 transitions. [2022-11-03 01:53:33,778 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 852 transitions. Word has length 266 [2022-11-03 01:53:33,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:53:33,778 INFO L495 AbstractCegarLoop]: Abstraction has 651 states and 852 transitions. [2022-11-03 01:53:33,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:33,778 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 852 transitions. [2022-11-03 01:53:33,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:53:33,779 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:53:33,779 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] [2022-11-03 01:53:33,801 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (105)] Ended with exit code 0 [2022-11-03 01:53:33,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:53:33,980 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:53:33,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:53:33,980 INFO L85 PathProgramCache]: Analyzing trace with hash -122591191, now seen corresponding path program 1 times [2022-11-03 01:53:33,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:53:33,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [94068053] [2022-11-03 01:53:33,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:33,982 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:53:33,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:53:33,983 INFO L229 MonitoredProcess]: Starting monitored process 106 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:53:33,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (106)] Waiting until timeout for monitored process [2022-11-03 01:53:34,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:34,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:53:34,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:53:35,662 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 01:53:35,662 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:53:35,662 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:53:35,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [94068053] [2022-11-03 01:53:35,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [94068053] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:53:35,663 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:53:35,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 01:53:35,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139972878] [2022-11-03 01:53:35,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:53:35,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:53:35,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:53:35,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:53:35,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:53:35,664 INFO L87 Difference]: Start difference. First operand 651 states and 852 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:37,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:53:37,856 INFO L93 Difference]: Finished difference Result 2578 states and 3586 transitions. [2022-11-03 01:53:37,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 01:53:37,862 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 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 266 [2022-11-03 01:53:37,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:53:37,865 INFO L225 Difference]: With dead ends: 2578 [2022-11-03 01:53:37,865 INFO L226 Difference]: Without dead ends: 2083 [2022-11-03 01:53:37,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 01:53:37,866 INFO L413 NwaCegarLoop]: 663 mSDtfsCounter, 3793 mSDsluCounter, 4753 mSDsCounter, 0 mSdLazyCounter, 1551 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3793 SdHoareTripleChecker+Valid, 5416 SdHoareTripleChecker+Invalid, 1576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-03 01:53:37,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3793 Valid, 5416 Invalid, 1576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1551 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-03 01:53:37,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2083 states. [2022-11-03 01:53:37,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2083 to 653. [2022-11-03 01:53:37,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 653 states, 652 states have (on average 1.3098159509202454) internal successors, (854), 652 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:37,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 854 transitions. [2022-11-03 01:53:37,882 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 854 transitions. Word has length 266 [2022-11-03 01:53:37,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:53:37,882 INFO L495 AbstractCegarLoop]: Abstraction has 653 states and 854 transitions. [2022-11-03 01:53:37,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:37,882 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 854 transitions. [2022-11-03 01:53:37,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:53:37,883 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:53:37,883 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] [2022-11-03 01:53:37,901 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (106)] Ended with exit code 0 [2022-11-03 01:53:38,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:53:38,084 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:53:38,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:53:38,084 INFO L85 PathProgramCache]: Analyzing trace with hash 557467179, now seen corresponding path program 1 times [2022-11-03 01:53:38,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:53:38,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [307265735] [2022-11-03 01:53:38,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:38,086 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:53:38,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:53:38,087 INFO L229 MonitoredProcess]: Starting monitored process 107 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:53:38,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (107)] Waiting until timeout for monitored process [2022-11-03 01:53:38,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:38,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:53:38,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:53:39,720 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 01:53:39,721 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:53:39,721 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:53:39,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [307265735] [2022-11-03 01:53:39,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [307265735] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:53:39,721 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:53:39,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 01:53:39,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011833203] [2022-11-03 01:53:39,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:53:39,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:53:39,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:53:39,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:53:39,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:53:39,722 INFO L87 Difference]: Start difference. First operand 653 states and 854 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:41,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:53:41,960 INFO L93 Difference]: Finished difference Result 2588 states and 3597 transitions. [2022-11-03 01:53:41,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 01:53:41,961 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 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 266 [2022-11-03 01:53:41,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:53:41,963 INFO L225 Difference]: With dead ends: 2588 [2022-11-03 01:53:41,963 INFO L226 Difference]: Without dead ends: 2091 [2022-11-03 01:53:41,964 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 01:53:41,964 INFO L413 NwaCegarLoop]: 666 mSDtfsCounter, 3799 mSDsluCounter, 4752 mSDsCounter, 0 mSdLazyCounter, 1553 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3799 SdHoareTripleChecker+Valid, 5418 SdHoareTripleChecker+Invalid, 1578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-03 01:53:41,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3799 Valid, 5418 Invalid, 1578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1553 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-03 01:53:41,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2091 states. [2022-11-03 01:53:41,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2091 to 655. [2022-11-03 01:53:41,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 655 states, 654 states have (on average 1.308868501529052) internal successors, (856), 654 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:41,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 856 transitions. [2022-11-03 01:53:41,979 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 856 transitions. Word has length 266 [2022-11-03 01:53:41,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:53:41,980 INFO L495 AbstractCegarLoop]: Abstraction has 655 states and 856 transitions. [2022-11-03 01:53:41,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:41,980 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 856 transitions. [2022-11-03 01:53:41,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:53:41,981 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:53:41,981 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] [2022-11-03 01:53:42,003 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (107)] Ended with exit code 0 [2022-11-03 01:53:42,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:53:42,182 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:53:42,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:53:42,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1962492755, now seen corresponding path program 1 times [2022-11-03 01:53:42,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:53:42,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1778655055] [2022-11-03 01:53:42,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:42,183 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:53:42,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:53:42,184 INFO L229 MonitoredProcess]: Starting monitored process 108 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:53:42,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (108)] Waiting until timeout for monitored process [2022-11-03 01:53:42,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:42,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:53:42,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:53:43,811 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 01:53:43,811 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:53:43,811 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:53:43,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1778655055] [2022-11-03 01:53:43,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1778655055] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:53:43,812 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:53:43,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:53:43,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460407836] [2022-11-03 01:53:43,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:53:43,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:53:43,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:53:43,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:53:43,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:53:43,813 INFO L87 Difference]: Start difference. First operand 655 states and 856 transitions. Second operand has 4 states, 4 states have (on average 66.5) internal successors, (266), 4 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:44,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:53:44,002 INFO L93 Difference]: Finished difference Result 1915 states and 2560 transitions. [2022-11-03 01:53:44,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:53:44,003 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 66.5) internal successors, (266), 4 states have internal predecessors, (266), 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 266 [2022-11-03 01:53:44,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:53:44,004 INFO L225 Difference]: With dead ends: 1915 [2022-11-03 01:53:44,004 INFO L226 Difference]: Without dead ends: 1416 [2022-11-03 01:53:44,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:53:44,005 INFO L413 NwaCegarLoop]: 714 mSDtfsCounter, 472 mSDsluCounter, 749 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 1463 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:53:44,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [472 Valid, 1463 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:53:44,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1416 states. [2022-11-03 01:53:44,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1416 to 917. [2022-11-03 01:53:44,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 917 states, 916 states have (on average 1.2991266375545851) internal successors, (1190), 916 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:44,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 917 states to 917 states and 1190 transitions. [2022-11-03 01:53:44,027 INFO L78 Accepts]: Start accepts. Automaton has 917 states and 1190 transitions. Word has length 266 [2022-11-03 01:53:44,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:53:44,027 INFO L495 AbstractCegarLoop]: Abstraction has 917 states and 1190 transitions. [2022-11-03 01:53:44,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 66.5) internal successors, (266), 4 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:44,028 INFO L276 IsEmpty]: Start isEmpty. Operand 917 states and 1190 transitions. [2022-11-03 01:53:44,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:53:44,029 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:53:44,029 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] [2022-11-03 01:53:44,053 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (108)] Ended with exit code 0 [2022-11-03 01:53:44,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:53:44,253 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:53:44,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:53:44,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1960645713, now seen corresponding path program 1 times [2022-11-03 01:53:44,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:53:44,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1393478555] [2022-11-03 01:53:44,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:44,256 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:53:44,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:53:44,256 INFO L229 MonitoredProcess]: Starting monitored process 109 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:53:44,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (109)] Waiting until timeout for monitored process [2022-11-03 01:53:44,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:45,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-03 01:53:45,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:53:47,113 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:53:47,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:53:50,703 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:53:50,703 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:53:50,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1393478555] [2022-11-03 01:53:50,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1393478555] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:53:50,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1359409078] [2022-11-03 01:53:50,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:50,704 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:53:50,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:53:50,710 INFO L229 MonitoredProcess]: Starting monitored process 110 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:53:50,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (110)] Waiting until timeout for monitored process [2022-11-03 01:53:52,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:52,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-03 01:53:52,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:53:54,208 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:53:54,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:53:55,322 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:53:55,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1359409078] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:53:55,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530814085] [2022-11-03 01:53:55,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:55,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:53:55,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:53:55,330 INFO L229 MonitoredProcess]: Starting monitored process 111 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:53:55,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-11-03 01:53:55,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:56,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-03 01:53:56,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:53:57,969 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:53:57,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:53:59,167 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:53:59,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530814085] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:53:59,167 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:53:59,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 11, 11] total 20 [2022-11-03 01:53:59,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461351767] [2022-11-03 01:53:59,168 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:53:59,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-03 01:53:59,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:53:59,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-03 01:53:59,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=323, Unknown=1, NotChecked=0, Total=380 [2022-11-03 01:53:59,172 INFO L87 Difference]: Start difference. First operand 917 states and 1190 transitions. Second operand has 20 states, 20 states have (on average 26.7) internal successors, (534), 20 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:59,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:53:59,617 INFO L93 Difference]: Finished difference Result 1345 states and 1711 transitions. [2022-11-03 01:53:59,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 01:53:59,618 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 26.7) internal successors, (534), 20 states have internal predecessors, (534), 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 266 [2022-11-03 01:53:59,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:53:59,620 INFO L225 Difference]: With dead ends: 1345 [2022-11-03 01:53:59,620 INFO L226 Difference]: Without dead ends: 1343 [2022-11-03 01:53:59,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1596 GetRequests, 1570 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=137, Invalid=512, Unknown=1, NotChecked=0, Total=650 [2022-11-03 01:53:59,621 INFO L413 NwaCegarLoop]: 316 mSDtfsCounter, 261 mSDsluCounter, 4424 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 4740 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 168 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:53:59,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [261 Valid, 4740 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 53 Invalid, 0 Unknown, 168 Unchecked, 0.1s Time] [2022-11-03 01:53:59,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1343 states. [2022-11-03 01:53:59,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1343 to 1326. [2022-11-03 01:53:59,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1326 states, 1325 states have (on average 1.2709433962264152) internal successors, (1684), 1325 states have internal predecessors, (1684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:59,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1326 states to 1326 states and 1684 transitions. [2022-11-03 01:53:59,652 INFO L78 Accepts]: Start accepts. Automaton has 1326 states and 1684 transitions. Word has length 266 [2022-11-03 01:53:59,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:53:59,652 INFO L495 AbstractCegarLoop]: Abstraction has 1326 states and 1684 transitions. [2022-11-03 01:53:59,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 26.7) internal successors, (534), 20 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:59,652 INFO L276 IsEmpty]: Start isEmpty. Operand 1326 states and 1684 transitions. [2022-11-03 01:53:59,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:53:59,654 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:53:59,654 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] [2022-11-03 01:53:59,695 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2022-11-03 01:53:59,895 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (109)] Forceful destruction successful, exit code 0 [2022-11-03 01:54:00,086 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (110)] Ended with exit code 0 [2022-11-03 01:54:00,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,109 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,110 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 01:54:00,278 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:54:00,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:54:00,279 INFO L85 PathProgramCache]: Analyzing trace with hash -2135768015, now seen corresponding path program 1 times [2022-11-03 01:54:00,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:54:00,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [481234729] [2022-11-03 01:54:00,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:54:00,280 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:54:00,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:54:00,281 INFO L229 MonitoredProcess]: Starting monitored process 112 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:54:00,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (112)] Waiting until timeout for monitored process [2022-11-03 01:54:01,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:54:01,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 01:54:01,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:54:01,172 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 01:54:01,172 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:54:01,172 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:54:01,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [481234729] [2022-11-03 01:54:01,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [481234729] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:54:01,173 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:54:01,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:54:01,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690000510] [2022-11-03 01:54:01,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:54:01,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:54:01,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:54:01,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:54:01,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:54:01,175 INFO L87 Difference]: Start difference. First operand 1326 states and 1684 transitions. Second operand has 4 states, 4 states have (on average 66.5) internal successors, (266), 4 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:01,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:54:01,373 INFO L93 Difference]: Finished difference Result 1832 states and 2379 transitions. [2022-11-03 01:54:01,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:54:01,375 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 66.5) internal successors, (266), 4 states have internal predecessors, (266), 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 266 [2022-11-03 01:54:01,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:54:01,376 INFO L225 Difference]: With dead ends: 1832 [2022-11-03 01:54:01,376 INFO L226 Difference]: Without dead ends: 927 [2022-11-03 01:54:01,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:54:01,377 INFO L413 NwaCegarLoop]: 387 mSDtfsCounter, 670 mSDsluCounter, 765 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 670 SdHoareTripleChecker+Valid, 1152 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:54:01,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [670 Valid, 1152 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:54:01,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2022-11-03 01:54:01,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 920. [2022-11-03 01:54:01,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 920 states, 919 states have (on average 1.2970620239390642) internal successors, (1192), 919 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:01,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 920 states to 920 states and 1192 transitions. [2022-11-03 01:54:01,403 INFO L78 Accepts]: Start accepts. Automaton has 920 states and 1192 transitions. Word has length 266 [2022-11-03 01:54:01,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:54:01,403 INFO L495 AbstractCegarLoop]: Abstraction has 920 states and 1192 transitions. [2022-11-03 01:54:01,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 66.5) internal successors, (266), 4 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:01,404 INFO L276 IsEmpty]: Start isEmpty. Operand 920 states and 1192 transitions. [2022-11-03 01:54:01,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2022-11-03 01:54:01,407 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:54:01,407 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:54:01,430 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (112)] Ended with exit code 0 [2022-11-03 01:54:01,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:54:01,622 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:54:01,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:54:01,622 INFO L85 PathProgramCache]: Analyzing trace with hash -912015111, now seen corresponding path program 1 times [2022-11-03 01:54:01,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:54:01,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1963869241] [2022-11-03 01:54:01,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:54:01,625 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:54:01,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:54:01,627 INFO L229 MonitoredProcess]: Starting monitored process 113 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:54:01,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (113)] Waiting until timeout for monitored process [2022-11-03 01:54:02,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:54:02,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 3563 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:54:02,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:54:03,497 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 261 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:54:03,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:54:04,045 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 264 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:54:04,045 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:54:04,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1963869241] [2022-11-03 01:54:04,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1963869241] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:54:04,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1566376798] [2022-11-03 01:54:04,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:54:04,046 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:54:04,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:54:04,048 INFO L229 MonitoredProcess]: Starting monitored process 114 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:54:04,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (114)] Waiting until timeout for monitored process [2022-11-03 01:54:05,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:54:06,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 3563 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 01:54:06,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:54:06,114 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 260 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 01:54:06,114 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:54:06,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1566376798] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:54:06,114 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:54:06,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 14 [2022-11-03 01:54:06,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160020225] [2022-11-03 01:54:06,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:54:06,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:54:06,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:54:06,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:54:06,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2022-11-03 01:54:06,117 INFO L87 Difference]: Start difference. First operand 920 states and 1192 transitions. Second operand has 5 states, 5 states have (on average 104.8) internal successors, (524), 5 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:06,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:54:06,278 INFO L93 Difference]: Finished difference Result 2855 states and 3781 transitions. [2022-11-03 01:54:06,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:54:06,279 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 104.8) internal successors, (524), 5 states have internal predecessors, (524), 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 527 [2022-11-03 01:54:06,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:54:06,281 INFO L225 Difference]: With dead ends: 2855 [2022-11-03 01:54:06,281 INFO L226 Difference]: Without dead ends: 2356 [2022-11-03 01:54:06,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1584 GetRequests, 1569 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-11-03 01:54:06,282 INFO L413 NwaCegarLoop]: 424 mSDtfsCounter, 2231 mSDsluCounter, 855 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2231 SdHoareTripleChecker+Valid, 1279 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:54:06,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2231 Valid, 1279 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:54:06,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2356 states. [2022-11-03 01:54:06,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2356 to 950. [2022-11-03 01:54:06,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 950 states, 949 states have (on average 1.3024236037934669) internal successors, (1236), 949 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:06,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 950 states to 950 states and 1236 transitions. [2022-11-03 01:54:06,304 INFO L78 Accepts]: Start accepts. Automaton has 950 states and 1236 transitions. Word has length 527 [2022-11-03 01:54:06,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:54:06,304 INFO L495 AbstractCegarLoop]: Abstraction has 950 states and 1236 transitions. [2022-11-03 01:54:06,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 104.8) internal successors, (524), 5 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:06,304 INFO L276 IsEmpty]: Start isEmpty. Operand 950 states and 1236 transitions. [2022-11-03 01:54:06,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2022-11-03 01:54:06,307 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:54:06,307 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:54:06,332 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (113)] Ended with exit code 0 [2022-11-03 01:54:06,522 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (114)] Forceful destruction successful, exit code 0 [2022-11-03 01:54:06,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,114 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 01:54:06,718 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:54:06,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:54:06,718 INFO L85 PathProgramCache]: Analyzing trace with hash -2100807685, now seen corresponding path program 1 times [2022-11-03 01:54:06,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:54:06,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [89350560] [2022-11-03 01:54:06,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:54:06,721 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:54:06,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:54:06,722 INFO L229 MonitoredProcess]: Starting monitored process 115 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:54:06,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (115)] Waiting until timeout for monitored process [2022-11-03 01:54:07,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:54:08,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 3563 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:54:08,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:54:08,523 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 261 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:54:08,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:54:08,982 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 264 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:54:08,982 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:54:08,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [89350560] [2022-11-03 01:54:08,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [89350560] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:54:08,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1490033632] [2022-11-03 01:54:08,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:54:08,983 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:54:08,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:54:08,986 INFO L229 MonitoredProcess]: Starting monitored process 116 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:54:09,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (116)] Waiting until timeout for monitored process [2022-11-03 01:54:10,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:54:10,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 3563 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 01:54:10,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:54:11,074 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 260 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 01:54:11,074 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:54:11,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1490033632] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:54:11,074 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:54:11,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 14 [2022-11-03 01:54:11,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965157990] [2022-11-03 01:54:11,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:54:11,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:54:11,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:54:11,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:54:11,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2022-11-03 01:54:11,076 INFO L87 Difference]: Start difference. First operand 950 states and 1236 transitions. Second operand has 5 states, 5 states have (on average 104.8) internal successors, (524), 5 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:11,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:54:11,209 INFO L93 Difference]: Finished difference Result 2903 states and 3850 transitions. [2022-11-03 01:54:11,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:54:11,209 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 104.8) internal successors, (524), 5 states have internal predecessors, (524), 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 527 [2022-11-03 01:54:11,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:54:11,211 INFO L225 Difference]: With dead ends: 2903 [2022-11-03 01:54:11,211 INFO L226 Difference]: Without dead ends: 2374 [2022-11-03 01:54:11,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1584 GetRequests, 1569 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-11-03 01:54:11,212 INFO L413 NwaCegarLoop]: 444 mSDtfsCounter, 2200 mSDsluCounter, 869 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2200 SdHoareTripleChecker+Valid, 1313 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:54:11,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2200 Valid, 1313 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:54:11,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2374 states. [2022-11-03 01:54:11,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2374 to 968. [2022-11-03 01:54:11,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 968 states, 967 states have (on average 1.3050672182006204) internal successors, (1262), 967 states have internal predecessors, (1262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:11,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 968 states to 968 states and 1262 transitions. [2022-11-03 01:54:11,233 INFO L78 Accepts]: Start accepts. Automaton has 968 states and 1262 transitions. Word has length 527 [2022-11-03 01:54:11,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:54:11,233 INFO L495 AbstractCegarLoop]: Abstraction has 968 states and 1262 transitions. [2022-11-03 01:54:11,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 104.8) internal successors, (524), 5 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:11,233 INFO L276 IsEmpty]: Start isEmpty. Operand 968 states and 1262 transitions. [2022-11-03 01:54:11,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2022-11-03 01:54:11,236 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:54:11,236 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:54:11,262 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (115)] Ended with exit code 0 [2022-11-03 01:54:11,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (116)] Forceful destruction successful, exit code 0 [2022-11-03 01:54:11,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,116 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 01:54:11,637 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:54:11,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:54:11,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1970943107, now seen corresponding path program 1 times [2022-11-03 01:54:11,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:54:11,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1532984770] [2022-11-03 01:54:11,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:54:11,640 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:54:11,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:54:11,640 INFO L229 MonitoredProcess]: Starting monitored process 117 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:54:11,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (117)] Waiting until timeout for monitored process [2022-11-03 01:54:12,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:54:12,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 3563 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:54:12,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:54:13,415 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 261 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:54:13,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:54:13,916 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 264 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:54:13,916 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:54:13,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1532984770] [2022-11-03 01:54:13,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1532984770] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:54:13,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1212586306] [2022-11-03 01:54:13,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:54:13,916 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:54:13,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:54:13,917 INFO L229 MonitoredProcess]: Starting monitored process 118 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:54:13,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (118)] Waiting until timeout for monitored process [2022-11-03 01:54:15,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:54:15,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 3563 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 01:54:15,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:54:15,956 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 228 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-03 01:54:15,956 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:54:15,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1212586306] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:54:15,956 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:54:15,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 14 [2022-11-03 01:54:15,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304099726] [2022-11-03 01:54:15,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:54:15,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:54:15,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:54:15,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:54:15,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2022-11-03 01:54:15,958 INFO L87 Difference]: Start difference. First operand 968 states and 1262 transitions. Second operand has 5 states, 5 states have (on average 100.6) internal successors, (503), 5 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:16,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:54:16,111 INFO L93 Difference]: Finished difference Result 3008 states and 4015 transitions. [2022-11-03 01:54:16,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:54:16,112 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 100.6) internal successors, (503), 5 states have internal predecessors, (503), 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 527 [2022-11-03 01:54:16,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:54:16,114 INFO L225 Difference]: With dead ends: 3008 [2022-11-03 01:54:16,114 INFO L226 Difference]: Without dead ends: 2461 [2022-11-03 01:54:16,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1584 GetRequests, 1569 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-11-03 01:54:16,115 INFO L413 NwaCegarLoop]: 444 mSDtfsCounter, 2226 mSDsluCounter, 937 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2226 SdHoareTripleChecker+Valid, 1381 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:54:16,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2226 Valid, 1381 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:54:16,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2461 states. [2022-11-03 01:54:16,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2461 to 1002. [2022-11-03 01:54:16,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1002 states, 1001 states have (on average 1.3096903096903096) internal successors, (1311), 1001 states have internal predecessors, (1311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:16,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1002 states to 1002 states and 1311 transitions. [2022-11-03 01:54:16,148 INFO L78 Accepts]: Start accepts. Automaton has 1002 states and 1311 transitions. Word has length 527 [2022-11-03 01:54:16,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:54:16,148 INFO L495 AbstractCegarLoop]: Abstraction has 1002 states and 1311 transitions. [2022-11-03 01:54:16,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 100.6) internal successors, (503), 5 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:16,148 INFO L276 IsEmpty]: Start isEmpty. Operand 1002 states and 1311 transitions. [2022-11-03 01:54:16,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2022-11-03 01:54:16,153 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:54:16,153 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-03 01:54:16,182 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (117)] Forceful destruction successful, exit code 0 [2022-11-03 01:54:16,362 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (118)] Ended with exit code 0 [2022-11-03 01:54:16,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,118 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 01:54:16,554 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:54:16,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:54:16,554 INFO L85 PathProgramCache]: Analyzing trace with hash 1010194303, now seen corresponding path program 1 times [2022-11-03 01:54:16,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:54:16,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2070998824] [2022-11-03 01:54:16,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:54:16,559 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:54:16,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:54:16,560 INFO L229 MonitoredProcess]: Starting monitored process 119 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:54:16,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (119)] Waiting until timeout for monitored process [2022-11-03 01:54:17,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:54:17,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 3563 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:54:17,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:54:18,328 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 261 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:54:18,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:54:18,791 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 264 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:54:18,791 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:54:18,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2070998824] [2022-11-03 01:54:18,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2070998824] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:54:18,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2075779890] [2022-11-03 01:54:18,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:54:18,791 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:54:18,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:54:18,792 INFO L229 MonitoredProcess]: Starting monitored process 120 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:54:18,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (120)] Waiting until timeout for monitored process [2022-11-03 01:54:20,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:54:20,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 3563 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 01:54:20,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:54:20,810 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 228 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-03 01:54:20,810 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:54:20,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2075779890] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:54:20,811 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:54:20,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 14 [2022-11-03 01:54:20,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525227407] [2022-11-03 01:54:20,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:54:20,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:54:20,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:54:20,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:54:20,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2022-11-03 01:54:20,812 INFO L87 Difference]: Start difference. First operand 1002 states and 1311 transitions. Second operand has 5 states, 5 states have (on average 100.6) internal successors, (503), 5 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:20,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:54:20,942 INFO L93 Difference]: Finished difference Result 3060 states and 4089 transitions. [2022-11-03 01:54:20,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:54:20,942 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 100.6) internal successors, (503), 5 states have internal predecessors, (503), 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 527 [2022-11-03 01:54:20,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:54:20,944 INFO L225 Difference]: With dead ends: 3060 [2022-11-03 01:54:20,944 INFO L226 Difference]: Without dead ends: 2479 [2022-11-03 01:54:20,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1584 GetRequests, 1569 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-11-03 01:54:20,945 INFO L413 NwaCegarLoop]: 466 mSDtfsCounter, 2189 mSDsluCounter, 955 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2189 SdHoareTripleChecker+Valid, 1421 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:54:20,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2189 Valid, 1421 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:54:20,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2479 states. [2022-11-03 01:54:20,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2479 to 1020. [2022-11-03 01:54:20,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1020 states, 1019 states have (on average 1.3120706575073602) internal successors, (1337), 1019 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:20,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1020 states to 1020 states and 1337 transitions. [2022-11-03 01:54:20,965 INFO L78 Accepts]: Start accepts. Automaton has 1020 states and 1337 transitions. Word has length 527 [2022-11-03 01:54:20,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:54:20,965 INFO L495 AbstractCegarLoop]: Abstraction has 1020 states and 1337 transitions. [2022-11-03 01:54:20,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 100.6) internal successors, (503), 5 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:20,965 INFO L276 IsEmpty]: Start isEmpty. Operand 1020 states and 1337 transitions. [2022-11-03 01:54:20,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2022-11-03 01:54:20,968 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:54:20,968 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:54:20,977 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (120)] Ended with exit code 0 [2022-11-03 01:54:21,193 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (119)] Ended with exit code 0 [2022-11-03 01:54:21,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,119 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:54:21,369 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:54:21,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:54:21,369 INFO L85 PathProgramCache]: Analyzing trace with hash -775208959, now seen corresponding path program 1 times [2022-11-03 01:54:21,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:54:21,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1738901283] [2022-11-03 01:54:21,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:54:21,371 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:54:21,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:54:21,372 INFO L229 MonitoredProcess]: Starting monitored process 121 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:54:21,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (121)] Waiting until timeout for monitored process [2022-11-03 01:54:22,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:54:22,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 3563 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:54:22,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:54:23,096 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 261 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:54:23,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:54:23,528 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 264 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:54:23,528 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:54:23,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1738901283] [2022-11-03 01:54:23,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1738901283] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:54:23,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1623509237] [2022-11-03 01:54:23,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:54:23,529 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:54:23,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:54:23,530 INFO L229 MonitoredProcess]: Starting monitored process 122 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:54:23,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (122)] Waiting until timeout for monitored process [2022-11-03 01:54:25,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:54:25,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 3563 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 01:54:25,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:54:25,656 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 228 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-03 01:54:25,656 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:54:25,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1623509237] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:54:25,656 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:54:25,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 14 [2022-11-03 01:54:25,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130725260] [2022-11-03 01:54:25,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:54:25,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:54:25,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:54:25,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:54:25,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2022-11-03 01:54:25,658 INFO L87 Difference]: Start difference. First operand 1020 states and 1337 transitions. Second operand has 5 states, 5 states have (on average 100.6) internal successors, (503), 5 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:25,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:54:25,792 INFO L93 Difference]: Finished difference Result 3148 states and 4212 transitions. [2022-11-03 01:54:25,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:54:25,793 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 100.6) internal successors, (503), 5 states have internal predecessors, (503), 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 527 [2022-11-03 01:54:25,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:54:25,795 INFO L225 Difference]: With dead ends: 3148 [2022-11-03 01:54:25,795 INFO L226 Difference]: Without dead ends: 2549 [2022-11-03 01:54:25,796 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1584 GetRequests, 1569 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-11-03 01:54:25,796 INFO L413 NwaCegarLoop]: 501 mSDtfsCounter, 2142 mSDsluCounter, 976 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2142 SdHoareTripleChecker+Valid, 1477 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:54:25,796 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2142 Valid, 1477 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:54:25,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2549 states. [2022-11-03 01:54:25,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2549 to 1096. [2022-11-03 01:54:25,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1096 states, 1095 states have (on average 1.3187214611872147) internal successors, (1444), 1095 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:25,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1096 states to 1096 states and 1444 transitions. [2022-11-03 01:54:25,827 INFO L78 Accepts]: Start accepts. Automaton has 1096 states and 1444 transitions. Word has length 527 [2022-11-03 01:54:25,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:54:25,828 INFO L495 AbstractCegarLoop]: Abstraction has 1096 states and 1444 transitions. [2022-11-03 01:54:25,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 100.6) internal successors, (503), 5 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:25,828 INFO L276 IsEmpty]: Start isEmpty. Operand 1096 states and 1444 transitions. [2022-11-03 01:54:25,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2022-11-03 01:54:25,848 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:54:25,848 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:54:25,859 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (122)] Ended with exit code 0 [2022-11-03 01:54:26,080 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (121)] Forceful destruction successful, exit code 0 [2022-11-03 01:54:26,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,121 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:54:26,254 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:54:26,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:54:26,255 INFO L85 PathProgramCache]: Analyzing trace with hash -430380797, now seen corresponding path program 1 times [2022-11-03 01:54:26,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:54:26,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [909414525] [2022-11-03 01:54:26,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:54:26,257 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:54:26,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:54:26,258 INFO L229 MonitoredProcess]: Starting monitored process 123 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:54:26,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (123)] Waiting until timeout for monitored process [2022-11-03 01:54:27,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:54:27,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 3563 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:54:27,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:54:28,039 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 261 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:54:28,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:54:28,499 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 264 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:54:28,499 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:54:28,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [909414525] [2022-11-03 01:54:28,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [909414525] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:54:28,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1903860266] [2022-11-03 01:54:28,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:54:28,500 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:54:28,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:54:28,501 INFO L229 MonitoredProcess]: Starting monitored process 124 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:54:28,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (124)] Waiting until timeout for monitored process [2022-11-03 01:54:30,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:54:30,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 3563 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 01:54:30,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:54:30,609 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 184 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-03 01:54:30,609 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:54:30,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1903860266] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:54:30,609 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:54:30,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 14 [2022-11-03 01:54:30,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252908783] [2022-11-03 01:54:30,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:54:30,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:54:30,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:54:30,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:54:30,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2022-11-03 01:54:30,611 INFO L87 Difference]: Start difference. First operand 1096 states and 1444 transitions. Second operand has 5 states, 5 states have (on average 94.0) internal successors, (470), 5 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:30,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:54:30,725 INFO L93 Difference]: Finished difference Result 3598 states and 4860 transitions. [2022-11-03 01:54:30,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:54:30,725 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 94.0) internal successors, (470), 5 states have internal predecessors, (470), 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 527 [2022-11-03 01:54:30,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:54:30,727 INFO L225 Difference]: With dead ends: 3598 [2022-11-03 01:54:30,727 INFO L226 Difference]: Without dead ends: 2923 [2022-11-03 01:54:30,728 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1584 GetRequests, 1569 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-11-03 01:54:30,729 INFO L413 NwaCegarLoop]: 516 mSDtfsCounter, 2254 mSDsluCounter, 1093 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2254 SdHoareTripleChecker+Valid, 1609 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:54:30,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2254 Valid, 1609 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:54:30,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2923 states. [2022-11-03 01:54:30,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2923 to 1256. [2022-11-03 01:54:30,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1256 states, 1255 states have (on average 1.3306772908366533) internal successors, (1670), 1255 states have internal predecessors, (1670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:30,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1256 states to 1256 states and 1670 transitions. [2022-11-03 01:54:30,752 INFO L78 Accepts]: Start accepts. Automaton has 1256 states and 1670 transitions. Word has length 527 [2022-11-03 01:54:30,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:54:30,752 INFO L495 AbstractCegarLoop]: Abstraction has 1256 states and 1670 transitions. [2022-11-03 01:54:30,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 94.0) internal successors, (470), 5 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:30,752 INFO L276 IsEmpty]: Start isEmpty. Operand 1256 states and 1670 transitions. [2022-11-03 01:54:30,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2022-11-03 01:54:30,755 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:54:30,755 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:54:30,765 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (124)] Ended with exit code 0 [2022-11-03 01:54:30,983 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (123)] Ended with exit code 0 [2022-11-03 01:54:31,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,123 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:54:31,156 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:54:31,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:54:31,156 INFO L85 PathProgramCache]: Analyzing trace with hash -816243199, now seen corresponding path program 1 times [2022-11-03 01:54:31,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:54:31,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1222081622] [2022-11-03 01:54:31,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:54:31,159 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:54:31,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:54:31,160 INFO L229 MonitoredProcess]: Starting monitored process 125 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:54:31,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (125)] Waiting until timeout for monitored process [2022-11-03 01:54:32,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:54:32,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 3563 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:54:32,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:54:32,897 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 261 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:54:32,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:54:33,388 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 264 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:54:33,388 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:54:33,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1222081622] [2022-11-03 01:54:33,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1222081622] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:54:33,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1795925957] [2022-11-03 01:54:33,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:54:33,389 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:54:33,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:54:33,390 INFO L229 MonitoredProcess]: Starting monitored process 126 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:54:33,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (126)] Waiting until timeout for monitored process [2022-11-03 01:54:35,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:54:35,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 3563 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 01:54:35,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:54:35,558 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 228 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-03 01:54:35,558 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:54:35,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1795925957] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:54:35,559 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:54:35,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 14 [2022-11-03 01:54:35,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440451231] [2022-11-03 01:54:35,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:54:35,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:54:35,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:54:35,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:54:35,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2022-11-03 01:54:35,560 INFO L87 Difference]: Start difference. First operand 1256 states and 1670 transitions. Second operand has 5 states, 5 states have (on average 100.6) internal successors, (503), 5 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:35,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:54:35,694 INFO L93 Difference]: Finished difference Result 3808 states and 5137 transitions. [2022-11-03 01:54:35,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:54:35,694 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 100.6) internal successors, (503), 5 states have internal predecessors, (503), 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 527 [2022-11-03 01:54:35,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:54:35,696 INFO L225 Difference]: With dead ends: 3808 [2022-11-03 01:54:35,696 INFO L226 Difference]: Without dead ends: 2973 [2022-11-03 01:54:35,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1584 GetRequests, 1569 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-11-03 01:54:35,698 INFO L413 NwaCegarLoop]: 510 mSDtfsCounter, 2129 mSDsluCounter, 980 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2129 SdHoareTripleChecker+Valid, 1490 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:54:35,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2129 Valid, 1490 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:54:35,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2973 states. [2022-11-03 01:54:35,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2973 to 1328. [2022-11-03 01:54:35,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1328 states, 1327 states have (on average 1.333835719668425) internal successors, (1770), 1327 states have internal predecessors, (1770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:35,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1328 states to 1328 states and 1770 transitions. [2022-11-03 01:54:35,721 INFO L78 Accepts]: Start accepts. Automaton has 1328 states and 1770 transitions. Word has length 527 [2022-11-03 01:54:35,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:54:35,721 INFO L495 AbstractCegarLoop]: Abstraction has 1328 states and 1770 transitions. [2022-11-03 01:54:35,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 100.6) internal successors, (503), 5 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:35,721 INFO L276 IsEmpty]: Start isEmpty. Operand 1328 states and 1770 transitions. [2022-11-03 01:54:35,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2022-11-03 01:54:35,724 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:54:35,724 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:54:35,755 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (125)] Ended with exit code 0 [2022-11-03 01:54:35,934 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (126)] Forceful destruction successful, exit code 0 [2022-11-03 01:54:36,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,126 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 01:54:36,125 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:54:36,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:54:36,125 INFO L85 PathProgramCache]: Analyzing trace with hash 1114882435, now seen corresponding path program 1 times [2022-11-03 01:54:36,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:54:36,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [37588858] [2022-11-03 01:54:36,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:54:36,128 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:54:36,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:54:36,128 INFO L229 MonitoredProcess]: Starting monitored process 127 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:54:36,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (127)] Waiting until timeout for monitored process [2022-11-03 01:54:37,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:54:37,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 3563 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:54:37,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:54:37,875 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 261 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:54:37,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:54:38,418 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 264 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:54:38,418 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:54:38,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [37588858] [2022-11-03 01:54:38,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [37588858] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:54:38,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [379256241] [2022-11-03 01:54:38,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:54:38,419 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:54:38,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:54:38,420 INFO L229 MonitoredProcess]: Starting monitored process 128 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:54:38,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (128)] Waiting until timeout for monitored process [2022-11-03 01:54:41,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:54:41,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 3563 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:54:41,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:54:41,666 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 261 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:54:41,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:54:42,190 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 264 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:54:42,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [379256241] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:54:42,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084558388] [2022-11-03 01:54:42,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:54:42,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:54:42,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:54:42,194 INFO L229 MonitoredProcess]: Starting monitored process 129 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:54:42,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2022-11-03 01:54:43,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:54:43,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 3563 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 01:54:43,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:54:44,329 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 255 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 01:54:44,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:54:45,991 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 255 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 01:54:45,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084558388] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:54:45,992 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:54:45,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 7, 7] total 20 [2022-11-03 01:54:45,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300133873] [2022-11-03 01:54:45,993 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:54:45,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-03 01:54:45,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:54:45,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-03 01:54:45,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2022-11-03 01:54:45,995 INFO L87 Difference]: Start difference. First operand 1328 states and 1770 transitions. Second operand has 20 states, 20 states have (on average 56.5) internal successors, (1130), 20 states have internal predecessors, (1130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:50,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:54:50,887 INFO L93 Difference]: Finished difference Result 12582 states and 17460 transitions. [2022-11-03 01:54:50,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-03 01:54:50,888 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 56.5) internal successors, (1130), 20 states have internal predecessors, (1130), 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 527 [2022-11-03 01:54:50,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:54:50,895 INFO L225 Difference]: With dead ends: 12582 [2022-11-03 01:54:50,895 INFO L226 Difference]: Without dead ends: 11675 [2022-11-03 01:54:50,898 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3203 GetRequests, 3138 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1234 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1109, Invalid=3313, Unknown=0, NotChecked=0, Total=4422 [2022-11-03 01:54:50,898 INFO L413 NwaCegarLoop]: 790 mSDtfsCounter, 17952 mSDsluCounter, 5692 mSDsCounter, 0 mSdLazyCounter, 1785 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17952 SdHoareTripleChecker+Valid, 6482 SdHoareTripleChecker+Invalid, 1869 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:54:50,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17952 Valid, 6482 Invalid, 1869 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1785 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-11-03 01:54:50,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11675 states. [2022-11-03 01:54:50,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11675 to 2241. [2022-11-03 01:54:50,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2241 states, 2240 states have (on average 1.3566964285714285) internal successors, (3039), 2240 states have internal predecessors, (3039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:50,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2241 states to 2241 states and 3039 transitions. [2022-11-03 01:54:50,956 INFO L78 Accepts]: Start accepts. Automaton has 2241 states and 3039 transitions. Word has length 527 [2022-11-03 01:54:50,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:54:50,956 INFO L495 AbstractCegarLoop]: Abstraction has 2241 states and 3039 transitions. [2022-11-03 01:54:50,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 56.5) internal successors, (1130), 20 states have internal predecessors, (1130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:50,956 INFO L276 IsEmpty]: Start isEmpty. Operand 2241 states and 3039 transitions. [2022-11-03 01:54:50,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2022-11-03 01:54:50,960 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:54:50,960 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:54:50,979 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (128)] Ended with exit code 0 [2022-11-03 01:54:51,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Forceful destruction successful, exit code 0 [2022-11-03 01:54:51,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (127)] Forceful destruction successful, exit code 0 [2022-11-03 01:54:51,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,129 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,127 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:54:51,580 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:54:51,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:54:51,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1522824953, now seen corresponding path program 1 times [2022-11-03 01:54:51,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:54:51,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [472045010] [2022-11-03 01:54:51,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:54:51,583 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:54:51,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:54:51,583 INFO L229 MonitoredProcess]: Starting monitored process 130 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:54:51,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (130)] Waiting until timeout for monitored process [2022-11-03 01:54:52,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:54:52,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 3563 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 01:54:52,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:54:54,365 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 257 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:54:54,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:54:55,530 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 257 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:54:55,530 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:54:55,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [472045010] [2022-11-03 01:54:55,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [472045010] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:54:55,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [444052809] [2022-11-03 01:54:55,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:54:55,531 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:54:55,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:54:55,532 INFO L229 MonitoredProcess]: Starting monitored process 131 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:54:55,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (131)] Waiting until timeout for monitored process [2022-11-03 01:54:58,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:54:58,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 3563 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-03 01:54:58,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:55:00,047 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 143 proven. 47 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-11-03 01:55:00,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:55:02,825 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 143 proven. 47 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-11-03 01:55:02,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [444052809] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:55:02,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341119443] [2022-11-03 01:55:02,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:55:02,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:55:02,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:55:02,827 INFO L229 MonitoredProcess]: Starting monitored process 132 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:55:02,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2022-11-03 01:55:03,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:55:03,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 3563 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 01:55:03,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:55:05,240 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 247 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 01:55:05,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:55:06,903 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 247 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 01:55:06,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341119443] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:55:06,904 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:55:06,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 17, 17, 8, 8] total 50 [2022-11-03 01:55:06,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337065789] [2022-11-03 01:55:06,904 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:55:06,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-03 01:55:06,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:55:06,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-03 01:55:06,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=2304, Unknown=0, NotChecked=0, Total=2450 [2022-11-03 01:55:06,908 INFO L87 Difference]: Start difference. First operand 2241 states and 3039 transitions. Second operand has 50 states, 50 states have (on average 39.88) internal successors, (1994), 50 states have internal predecessors, (1994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:39,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:39,990 INFO L93 Difference]: Finished difference Result 151885 states and 215767 transitions. [2022-11-03 01:57:39,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 857 states. [2022-11-03 01:57:39,991 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 39.88) internal successors, (1994), 50 states have internal predecessors, (1994), 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 527 [2022-11-03 01:57:39,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:40,093 INFO L225 Difference]: With dead ends: 151885 [2022-11-03 01:57:40,093 INFO L226 Difference]: Without dead ends: 150065 [2022-11-03 01:57:40,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4041 GetRequests, 3109 SyntacticMatches, 32 SemanticMatches, 900 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378817 ImplicationChecksByTransitivity, 104.9s TimeCoverageRelationStatistics Valid=68788, Invalid=743914, Unknown=0, NotChecked=0, Total=812702 [2022-11-03 01:57:40,157 INFO L413 NwaCegarLoop]: 5212 mSDtfsCounter, 44984 mSDsluCounter, 168830 mSDsCounter, 0 mSdLazyCounter, 27208 mSolverCounterSat, 407 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44984 SdHoareTripleChecker+Valid, 174042 SdHoareTripleChecker+Invalid, 57890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.4s SdHoareTripleChecker+Time, 407 IncrementalHoareTripleChecker+Valid, 27208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30275 IncrementalHoareTripleChecker+Unchecked, 33.9s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:40,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44984 Valid, 174042 Invalid, 57890 Unknown, 0 Unchecked, 0.4s Time], IncrementalHoareTripleChecker [407 Valid, 27208 Invalid, 0 Unknown, 30275 Unchecked, 33.9s Time] [2022-11-03 01:57:40,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150065 states. [2022-11-03 01:57:41,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150065 to 10421. [2022-11-03 01:57:41,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10421 states, 10420 states have (on average 1.4005758157389636) internal successors, (14594), 10420 states have internal predecessors, (14594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:41,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10421 states to 10421 states and 14594 transitions. [2022-11-03 01:57:41,468 INFO L78 Accepts]: Start accepts. Automaton has 10421 states and 14594 transitions. Word has length 527 [2022-11-03 01:57:41,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:41,468 INFO L495 AbstractCegarLoop]: Abstraction has 10421 states and 14594 transitions. [2022-11-03 01:57:41,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 39.88) internal successors, (1994), 50 states have internal predecessors, (1994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:41,469 INFO L276 IsEmpty]: Start isEmpty. Operand 10421 states and 14594 transitions. [2022-11-03 01:57:41,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2022-11-03 01:57:41,478 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:41,478 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:57:41,508 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Ended with exit code 0 [2022-11-03 01:57:41,707 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (130)] Ended with exit code 0 [2022-11-03 01:57:41,893 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (131)] Forceful destruction successful, exit code 0 [2022-11-03 01:57:42,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,130 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,131 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 01:57:42,079 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:42,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:42,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1773043831, now seen corresponding path program 1 times [2022-11-03 01:57:42,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:57:42,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1208029969] [2022-11-03 01:57:42,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:42,083 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:57:42,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:57:42,084 INFO L229 MonitoredProcess]: Starting monitored process 133 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:57:42,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (133)] Waiting until timeout for monitored process [2022-11-03 01:57:43,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:43,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 3563 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 01:57:43,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:46,055 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 255 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:57:46,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:57:47,203 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 255 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:57:47,203 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:57:47,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1208029969] [2022-11-03 01:57:47,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1208029969] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:57:47,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1364772576] [2022-11-03 01:57:47,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:47,204 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:57:47,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:57:47,205 INFO L229 MonitoredProcess]: Starting monitored process 134 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:57:47,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (134)] Waiting until timeout for monitored process [2022-11-03 01:57:49,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:49,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 3563 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-03 01:57:49,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:51,794 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 139 proven. 51 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-11-03 01:57:51,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:57:54,755 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 139 proven. 51 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-11-03 01:57:54,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1364772576] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:57:54,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744495625] [2022-11-03 01:57:54,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:54,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:57:54,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:57:54,756 INFO L229 MonitoredProcess]: Starting monitored process 135 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:57:54,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2022-11-03 01:57:55,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:55,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 3563 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 01:57:55,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:56,992 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 247 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 01:57:56,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:57:58,597 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 247 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 01:57:58,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744495625] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:57:58,597 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:57:58,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 17, 17, 7, 7] total 48 [2022-11-03 01:57:58,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820944182] [2022-11-03 01:57:58,598 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:57:58,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-03 01:57:58,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:57:58,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-03 01:57:58,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=2119, Unknown=0, NotChecked=0, Total=2256 [2022-11-03 01:57:58,599 INFO L87 Difference]: Start difference. First operand 10421 states and 14594 transitions. Second operand has 48 states, 48 states have (on average 42.041666666666664) internal successors, (2018), 48 states have internal predecessors, (2018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:08,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:59:08,285 INFO L93 Difference]: Finished difference Result 168376 states and 239446 transitions. [2022-11-03 01:59:08,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 462 states. [2022-11-03 01:59:08,286 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 42.041666666666664) internal successors, (2018), 48 states have internal predecessors, (2018), 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 527 [2022-11-03 01:59:08,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:59:08,438 INFO L225 Difference]: With dead ends: 168376 [2022-11-03 01:59:08,438 INFO L226 Difference]: Without dead ends: 158388 [2022-11-03 01:59:08,468 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3626 GetRequests, 3120 SyntacticMatches, 0 SemanticMatches, 506 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110704 ImplicationChecksByTransitivity, 52.5s TimeCoverageRelationStatistics Valid=24138, Invalid=233418, Unknown=0, NotChecked=0, Total=257556 [2022-11-03 01:59:08,468 INFO L413 NwaCegarLoop]: 1926 mSDtfsCounter, 91495 mSDsluCounter, 51159 mSDsCounter, 0 mSdLazyCounter, 10225 mSolverCounterSat, 1539 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91495 SdHoareTripleChecker+Valid, 53085 SdHoareTripleChecker+Invalid, 31671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1539 IncrementalHoareTripleChecker+Valid, 10225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19907 IncrementalHoareTripleChecker+Unchecked, 13.8s IncrementalHoareTripleChecker+Time [2022-11-03 01:59:08,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91495 Valid, 53085 Invalid, 31671 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1539 Valid, 10225 Invalid, 0 Unknown, 19907 Unchecked, 13.8s Time] [2022-11-03 01:59:08,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158388 states. [2022-11-03 01:59:09,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158388 to 12601. [2022-11-03 01:59:09,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12601 states, 12600 states have (on average 1.3998412698412699) internal successors, (17638), 12600 states have internal predecessors, (17638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:09,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12601 states to 12601 states and 17638 transitions. [2022-11-03 01:59:09,605 INFO L78 Accepts]: Start accepts. Automaton has 12601 states and 17638 transitions. Word has length 527 [2022-11-03 01:59:09,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:59:09,605 INFO L495 AbstractCegarLoop]: Abstraction has 12601 states and 17638 transitions. [2022-11-03 01:59:09,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 42.041666666666664) internal successors, (2018), 48 states have internal predecessors, (2018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:09,606 INFO L276 IsEmpty]: Start isEmpty. Operand 12601 states and 17638 transitions. [2022-11-03 01:59:09,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2022-11-03 01:59:09,610 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:59:09,610 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:59:09,624 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (134)] Ended with exit code 0 [2022-11-03 01:59:09,838 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Forceful destruction successful, exit code 0 [2022-11-03 01:59:10,040 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (133)] Forceful destruction successful, exit code 0 [2022-11-03 01:59:10,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,135 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,133 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:59:10,211 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:59:10,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:59:10,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1398749197, now seen corresponding path program 1 times [2022-11-03 01:59:10,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:59:10,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1140600797] [2022-11-03 01:59:10,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:59:10,214 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:59:10,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:59:10,214 INFO L229 MonitoredProcess]: Starting monitored process 136 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:59:10,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (136)] Waiting until timeout for monitored process [2022-11-03 01:59:11,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:59:11,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 3563 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 01:59:11,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:59:12,423 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 241 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 01:59:12,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:59:13,890 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 241 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 01:59:13,890 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:59:13,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1140600797] [2022-11-03 01:59:13,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1140600797] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:59:13,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2060889303] [2022-11-03 01:59:13,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:59:13,891 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:59:13,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:59:13,892 INFO L229 MonitoredProcess]: Starting monitored process 137 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:59:13,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (137)] Waiting until timeout for monitored process [2022-11-03 01:59:16,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:59:16,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 3563 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-03 01:59:16,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:59:18,163 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 137 proven. 53 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-11-03 01:59:18,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:59:20,835 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 137 proven. 53 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-11-03 01:59:20,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2060889303] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:59:20,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110210438] [2022-11-03 01:59:20,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:59:20,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:59:20,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:59:20,837 INFO L229 MonitoredProcess]: Starting monitored process 138 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:59:20,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2022-11-03 01:59:21,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:59:21,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 3563 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 01:59:21,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:59:22,842 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 241 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 01:59:22,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:59:24,229 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 241 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 01:59:24,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110210438] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:59:24,230 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:59:24,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 17, 17, 7, 7] total 39 [2022-11-03 01:59:24,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605077941] [2022-11-03 01:59:24,230 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:59:24,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-03 01:59:24,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:59:24,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-03 01:59:24,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1373, Unknown=0, NotChecked=0, Total=1482 [2022-11-03 01:59:24,232 INFO L87 Difference]: Start difference. First operand 12601 states and 17638 transitions. Second operand has 39 states, 39 states have (on average 37.794871794871796) internal successors, (1474), 39 states have internal predecessors, (1474), 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 02:00:09,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:00:09,916 INFO L93 Difference]: Finished difference Result 245598 states and 345851 transitions. [2022-11-03 02:00:09,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 242 states. [2022-11-03 02:00:09,918 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 37.794871794871796) internal successors, (1474), 39 states have internal predecessors, (1474), 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 527 [2022-11-03 02:00:09,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:00:10,335 INFO L225 Difference]: With dead ends: 245598 [2022-11-03 02:00:10,335 INFO L226 Difference]: Without dead ends: 233458 [2022-11-03 02:00:10,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3455 GetRequests, 3123 SyntacticMatches, 55 SemanticMatches, 277 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33140 ImplicationChecksByTransitivity, 32.5s TimeCoverageRelationStatistics Valid=12340, Invalid=65222, Unknown=0, NotChecked=0, Total=77562 [2022-11-03 02:00:10,357 INFO L413 NwaCegarLoop]: 2207 mSDtfsCounter, 29758 mSDsluCounter, 39735 mSDsCounter, 0 mSdLazyCounter, 6222 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29758 SdHoareTripleChecker+Valid, 41942 SdHoareTripleChecker+Invalid, 22028 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 6222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 15635 IncrementalHoareTripleChecker+Unchecked, 8.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:00:10,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29758 Valid, 41942 Invalid, 22028 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [171 Valid, 6222 Invalid, 0 Unknown, 15635 Unchecked, 8.8s Time] [2022-11-03 02:00:10,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233458 states. [2022-11-03 02:00:11,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233458 to 12653. [2022-11-03 02:00:11,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12653 states, 12652 states have (on average 1.3981979133733797) internal successors, (17690), 12652 states have internal predecessors, (17690), 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 02:00:11,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12653 states to 12653 states and 17690 transitions. [2022-11-03 02:00:11,488 INFO L78 Accepts]: Start accepts. Automaton has 12653 states and 17690 transitions. Word has length 527 [2022-11-03 02:00:11,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:00:11,489 INFO L495 AbstractCegarLoop]: Abstraction has 12653 states and 17690 transitions. [2022-11-03 02:00:11,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 37.794871794871796) internal successors, (1474), 39 states have internal predecessors, (1474), 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 02:00:11,489 INFO L276 IsEmpty]: Start isEmpty. Operand 12653 states and 17690 transitions. [2022-11-03 02:00:11,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2022-11-03 02:00:11,493 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:00:11,493 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:00:11,521 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Ended with exit code 0 [2022-11-03 02:00:11,721 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (136)] Ended with exit code 0 [2022-11-03 02:00:11,908 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (137)] Ended with exit code 0 [2022-11-03 02:00:12,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,136 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,137 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:00:12,094 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:00:12,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:00:12,094 INFO L85 PathProgramCache]: Analyzing trace with hash 564737169, now seen corresponding path program 1 times [2022-11-03 02:00:12,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:00:12,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [811530176] [2022-11-03 02:00:12,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:12,097 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:00:12,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:00:12,098 INFO L229 MonitoredProcess]: Starting monitored process 139 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:00:12,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (139)] Waiting until timeout for monitored process [2022-11-03 02:00:13,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:13,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 3563 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:00:13,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:00:14,305 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 239 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 02:00:14,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:00:15,679 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 239 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 02:00:15,679 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:00:15,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [811530176] [2022-11-03 02:00:15,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [811530176] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:00:15,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [133483558] [2022-11-03 02:00:15,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:15,680 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:00:15,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:00:15,681 INFO L229 MonitoredProcess]: Starting monitored process 140 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:00:15,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (140)] Waiting until timeout for monitored process [2022-11-03 02:00:18,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:18,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 3563 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-03 02:00:18,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:00:20,017 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 135 proven. 55 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-11-03 02:00:20,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:00:22,636 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 135 proven. 55 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-11-03 02:00:22,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [133483558] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:00:22,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16653342] [2022-11-03 02:00:22,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:22,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:00:22,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:00:22,638 INFO L229 MonitoredProcess]: Starting monitored process 141 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:00:22,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2022-11-03 02:00:23,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:23,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 3563 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:00:23,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:00:24,620 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 239 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 02:00:24,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:00:25,930 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 239 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 02:00:25,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16653342] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:00:25,930 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:00:25,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 17, 17, 7, 7] total 39 [2022-11-03 02:00:25,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141693427] [2022-11-03 02:00:25,931 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:00:25,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-03 02:00:25,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:00:25,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-03 02:00:25,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1373, Unknown=0, NotChecked=0, Total=1482 [2022-11-03 02:00:25,933 INFO L87 Difference]: Start difference. First operand 12653 states and 17690 transitions. Second operand has 39 states, 39 states have (on average 37.84615384615385) internal successors, (1476), 39 states have internal predecessors, (1476), 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 02:01:09,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:01:09,443 INFO L93 Difference]: Finished difference Result 220570 states and 312420 transitions. [2022-11-03 02:01:09,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 270 states. [2022-11-03 02:01:09,445 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 37.84615384615385) internal successors, (1476), 39 states have internal predecessors, (1476), 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 527 [2022-11-03 02:01:09,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:01:09,641 INFO L225 Difference]: With dead ends: 220570 [2022-11-03 02:01:09,641 INFO L226 Difference]: Without dead ends: 208386 [2022-11-03 02:01:09,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3471 GetRequests, 3118 SyntacticMatches, 48 SemanticMatches, 305 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40658 ImplicationChecksByTransitivity, 35.9s TimeCoverageRelationStatistics Valid=15466, Invalid=78476, Unknown=0, NotChecked=0, Total=93942 [2022-11-03 02:01:09,683 INFO L413 NwaCegarLoop]: 943 mSDtfsCounter, 36608 mSDsluCounter, 20343 mSDsCounter, 0 mSdLazyCounter, 3017 mSolverCounterSat, 330 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36608 SdHoareTripleChecker+Valid, 21286 SdHoareTripleChecker+Invalid, 11065 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 330 IncrementalHoareTripleChecker+Valid, 3017 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7718 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:01:09,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36608 Valid, 21286 Invalid, 11065 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [330 Valid, 3017 Invalid, 0 Unknown, 7718 Unchecked, 4.8s Time] [2022-11-03 02:01:09,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208386 states. [2022-11-03 02:01:10,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208386 to 12705. [2022-11-03 02:01:11,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12705 states, 12704 states have (on average 1.3965680100755669) internal successors, (17742), 12704 states have internal predecessors, (17742), 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 02:01:11,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12705 states to 12705 states and 17742 transitions. [2022-11-03 02:01:11,016 INFO L78 Accepts]: Start accepts. Automaton has 12705 states and 17742 transitions. Word has length 527 [2022-11-03 02:01:11,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:01:11,016 INFO L495 AbstractCegarLoop]: Abstraction has 12705 states and 17742 transitions. [2022-11-03 02:01:11,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 37.84615384615385) internal successors, (1476), 39 states have internal predecessors, (1476), 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 02:01:11,017 INFO L276 IsEmpty]: Start isEmpty. Operand 12705 states and 17742 transitions. [2022-11-03 02:01:11,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2022-11-03 02:01:11,021 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:01:11,021 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:01:11,049 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (139)] Ended with exit code 0 [2022-11-03 02:01:11,236 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (140)] Ended with exit code 0 [2022-11-03 02:01:11,450 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Ended with exit code 0 [2022-11-03 02:01:11,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,140 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,141 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:01:11,622 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:01:11,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:01:11,622 INFO L85 PathProgramCache]: Analyzing trace with hash 210797077, now seen corresponding path program 1 times [2022-11-03 02:01:11,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:01:11,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1744063720] [2022-11-03 02:01:11,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:01:11,625 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:01:11,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:01:11,626 INFO L229 MonitoredProcess]: Starting monitored process 142 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:01:11,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (142)] Waiting until timeout for monitored process [2022-11-03 02:01:12,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:12,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 3563 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:01:12,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:01:13,891 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 237 proven. 9 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 02:01:13,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:01:15,286 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 237 proven. 9 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 02:01:15,286 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:01:15,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1744063720] [2022-11-03 02:01:15,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1744063720] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:01:15,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [353535554] [2022-11-03 02:01:15,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:01:15,286 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:01:15,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:01:15,287 INFO L229 MonitoredProcess]: Starting monitored process 143 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:01:15,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f42e1d3-a9ff-4931-9026-24fbc54c1252/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (143)] Waiting until timeout for monitored process