./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.client_server.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_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/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_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.client_server.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/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_918e6cca-8261-431d-8f44-92983ef07c96/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 2efa62b5c78d9a8e6cb22bbcfab0dad1178c73ba328a91d31f235444a8b17b87 --- 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 03:43:47,481 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:43:47,483 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:43:47,513 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:43:47,514 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:43:47,515 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:43:47,516 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:43:47,518 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:43:47,519 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:43:47,520 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:43:47,521 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:43:47,522 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:43:47,523 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:43:47,524 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:43:47,525 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:43:47,526 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:43:47,527 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:43:47,528 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:43:47,529 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:43:47,531 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:43:47,532 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:43:47,534 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:43:47,535 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:43:47,536 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:43:47,539 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:43:47,539 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:43:47,540 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:43:47,541 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:43:47,541 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:43:47,542 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:43:47,542 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:43:47,543 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:43:47,544 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:43:47,545 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:43:47,546 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:43:47,547 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:43:47,548 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:43:47,549 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:43:47,550 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:43:47,550 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:43:47,551 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:43:47,553 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 03:43:47,585 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:43:47,596 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:43:47,596 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:43:47,597 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:43:47,597 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:43:47,598 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:43:47,598 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:43:47,598 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:43:47,599 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:43:47,599 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 03:43:47,600 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:43:47,600 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:43:47,601 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 03:43:47,601 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 03:43:47,601 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:43:47,601 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 03:43:47,601 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 03:43:47,602 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 03:43:47,602 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:43:47,603 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 03:43:47,604 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:43:47,606 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 03:43:47,610 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:43:47,611 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 03:43:47,612 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 03:43:47,612 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:43:47,612 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 03:43:47,615 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:43:47,615 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:43:47,615 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:43:47,616 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:43:47,616 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 03:43:47,616 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:43:47,616 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 03:43:47,616 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 03:43:47,617 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 03:43:47,617 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 03:43:47,617 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:43:47,617 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_918e6cca-8261-431d-8f44-92983ef07c96/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2efa62b5c78d9a8e6cb22bbcfab0dad1178c73ba328a91d31f235444a8b17b87 [2022-11-03 03:43:47,872 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:43:47,901 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:43:47,906 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:43:47,907 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:43:47,908 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:43:47,910 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.client_server.c [2022-11-03 03:43:47,999 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/data/36957d247/7ee7ceae70954d61a370804c83e0ff9a/FLAG88022aab6 [2022-11-03 03:43:48,497 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:43:48,502 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.client_server.c [2022-11-03 03:43:48,518 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/data/36957d247/7ee7ceae70954d61a370804c83e0ff9a/FLAG88022aab6 [2022-11-03 03:43:48,823 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/data/36957d247/7ee7ceae70954d61a370804c83e0ff9a [2022-11-03 03:43:48,826 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:43:48,829 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:43:48,832 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:43:48,833 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:43:48,836 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:43:48,838 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:43:48" (1/1) ... [2022-11-03 03:43:48,841 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@146f5f3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:48, skipping insertion in model container [2022-11-03 03:43:48,841 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:43:48" (1/1) ... [2022-11-03 03:43:48,851 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:43:48,887 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:43:49,056 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_918e6cca-8261-431d-8f44-92983ef07c96/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.client_server.c[1107,1120] [2022-11-03 03:43:49,234 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:43:49,237 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:43:49,249 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_918e6cca-8261-431d-8f44-92983ef07c96/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.client_server.c[1107,1120] [2022-11-03 03:43:49,345 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:43:49,366 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:43:49,369 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:49 WrapperNode [2022-11-03 03:43:49,369 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:43:49,371 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:43:49,371 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:43:49,372 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:43:49,379 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:49" (1/1) ... [2022-11-03 03:43:49,412 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:49" (1/1) ... [2022-11-03 03:43:49,487 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 663 [2022-11-03 03:43:49,505 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:43:49,506 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:43:49,506 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:43:49,506 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:43:49,515 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:49" (1/1) ... [2022-11-03 03:43:49,516 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:49" (1/1) ... [2022-11-03 03:43:49,523 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:49" (1/1) ... [2022-11-03 03:43:49,523 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:49" (1/1) ... [2022-11-03 03:43:49,543 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:49" (1/1) ... [2022-11-03 03:43:49,549 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:49" (1/1) ... [2022-11-03 03:43:49,553 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:49" (1/1) ... [2022-11-03 03:43:49,558 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:49" (1/1) ... [2022-11-03 03:43:49,567 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:43:49,568 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:43:49,568 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:43:49,568 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:43:49,569 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:49" (1/1) ... [2022-11-03 03:43:49,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:43:49,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:43:49,613 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:43:49,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:43:49,688 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:43:49,689 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:43:49,944 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:43:49,946 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:43:50,763 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:43:51,812 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:43:51,812 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 03:43:51,815 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:43:51 BoogieIcfgContainer [2022-11-03 03:43:51,815 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:43:51,819 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:43:51,819 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:43:51,823 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:43:51,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:43:48" (1/3) ... [2022-11-03 03:43:51,825 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7436daca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:43:51, skipping insertion in model container [2022-11-03 03:43:51,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:49" (2/3) ... [2022-11-03 03:43:51,825 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7436daca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:43:51, skipping insertion in model container [2022-11-03 03:43:51,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:43:51" (3/3) ... [2022-11-03 03:43:51,827 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.client_server.c [2022-11-03 03:43:51,849 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:43:51,850 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 03:43:51,915 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:43:51,933 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;@71119734, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:43:51,935 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 03:43:51,939 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 03:43:51,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-03 03:43:51,950 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:43:51,950 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-03 03:43:51,951 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:43:51,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:43:51,959 INFO L85 PathProgramCache]: Analyzing trace with hash 13855531, now seen corresponding path program 1 times [2022-11-03 03:43:51,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:43:51,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832589406] [2022-11-03 03:43:51,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:43:51,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:43:52,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 03:43:52,819 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-03 03:43:53,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 03:43:53,259 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-03 03:43:53,261 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-03 03:43:53,262 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-03 03:43:53,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 03:43:53,270 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-03 03:43:53,275 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-03 03:43:53,323 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2022-11-03 03:43:53,337 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 03:43:53 BoogieIcfgContainer [2022-11-03 03:43:53,342 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-03 03:43:53,344 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-03 03:43:53,344 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-03 03:43:53,344 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-03 03:43:53,345 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:43:51" (3/4) ... [2022-11-03 03:43:53,349 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-03 03:43:53,349 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-03 03:43:53,353 INFO L158 Benchmark]: Toolchain (without parser) took 4522.60ms. Allocated memory was 123.7MB in the beginning and 218.1MB in the end (delta: 94.4MB). Free memory was 91.9MB in the beginning and 136.9MB in the end (delta: -45.1MB). Peak memory consumption was 49.0MB. Max. memory is 16.1GB. [2022-11-03 03:43:53,353 INFO L158 Benchmark]: CDTParser took 0.27ms. Allocated memory is still 88.1MB. Free memory is still 42.5MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 03:43:53,354 INFO L158 Benchmark]: CACSL2BoogieTranslator took 537.15ms. Allocated memory is still 123.7MB. Free memory was 91.6MB in the beginning and 89.9MB in the end (delta: 1.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-03 03:43:53,356 INFO L158 Benchmark]: Boogie Procedure Inliner took 134.19ms. Allocated memory is still 123.7MB. Free memory was 89.9MB in the beginning and 82.0MB in the end (delta: 7.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-03 03:43:53,357 INFO L158 Benchmark]: Boogie Preprocessor took 61.29ms. Allocated memory is still 123.7MB. Free memory was 82.0MB in the beginning and 77.8MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-03 03:43:53,362 INFO L158 Benchmark]: RCFGBuilder took 2247.64ms. Allocated memory was 123.7MB in the beginning and 180.4MB in the end (delta: 56.6MB). Free memory was 77.8MB in the beginning and 138.4MB in the end (delta: -60.6MB). Peak memory consumption was 72.5MB. Max. memory is 16.1GB. [2022-11-03 03:43:53,364 INFO L158 Benchmark]: TraceAbstraction took 1522.78ms. Allocated memory was 180.4MB in the beginning and 218.1MB in the end (delta: 37.7MB). Free memory was 137.3MB in the beginning and 136.9MB in the end (delta: 414.3kB). Peak memory consumption was 90.6MB. Max. memory is 16.1GB. [2022-11-03 03:43:53,365 INFO L158 Benchmark]: Witness Printer took 6.78ms. Allocated memory is still 218.1MB. Free memory is still 136.9MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 03:43:53,372 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27ms. Allocated memory is still 88.1MB. Free memory is still 42.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 537.15ms. Allocated memory is still 123.7MB. Free memory was 91.6MB in the beginning and 89.9MB in the end (delta: 1.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 134.19ms. Allocated memory is still 123.7MB. Free memory was 89.9MB in the beginning and 82.0MB in the end (delta: 7.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 61.29ms. Allocated memory is still 123.7MB. Free memory was 82.0MB in the beginning and 77.8MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 2247.64ms. Allocated memory was 123.7MB in the beginning and 180.4MB in the end (delta: 56.6MB). Free memory was 77.8MB in the beginning and 138.4MB in the end (delta: -60.6MB). Peak memory consumption was 72.5MB. Max. memory is 16.1GB. * TraceAbstraction took 1522.78ms. Allocated memory was 180.4MB in the beginning and 218.1MB in the end (delta: 37.7MB). Free memory was 137.3MB in the beginning and 136.9MB in the end (delta: 414.3kB). Peak memory consumption was 90.6MB. Max. memory is 16.1GB. * Witness Printer took 6.78ms. Allocated memory is still 218.1MB. Free memory is still 136.9MB. 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 97, overapproximation of bitwiseAnd at line 95. 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 - 5); [L29] const SORT_3 msb_SORT_3 = (SORT_3)1 << (5 - 1); [L31] const SORT_1 var_6 = 0; [L32] const SORT_1 var_18 = 1; [L34] SORT_1 input_2; [L35] SORT_3 input_4; [L36] SORT_3 input_5; [L37] SORT_1 input_77; [L38] SORT_3 input_79; [L39] SORT_1 input_89; [L40] SORT_3 input_96; [L42] SORT_1 state_7 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L43] SORT_1 state_9 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L44] SORT_1 state_12 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L45] SORT_1 state_14 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L46] SORT_1 state_75 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L48] SORT_1 init_8_arg_1 = var_6; [L49] state_7 = init_8_arg_1 [L50] SORT_1 init_10_arg_1 = var_6; [L51] state_9 = init_10_arg_1 [L52] SORT_1 init_13_arg_1 = var_6; [L53] state_12 = init_13_arg_1 [L54] SORT_1 init_15_arg_1 = var_6; [L55] state_14 = init_15_arg_1 [L56] SORT_1 init_76_arg_1 = var_18; [L57] state_75 = init_76_arg_1 VAL [init_10_arg_1=0, init_13_arg_1=0, init_15_arg_1=0, init_76_arg_1=1, init_8_arg_1=0, mask_SORT_1=1, mask_SORT_3=31, msb_SORT_1=1, msb_SORT_3=16, state_12=0, state_14=0, state_7=0, state_75=1, state_9=0, var_18=1, var_6=0] [L60] input_2 = __VERIFIER_nondet_uchar() [L61] input_4 = __VERIFIER_nondet_uchar() [L62] input_5 = __VERIFIER_nondet_uchar() [L63] input_77 = __VERIFIER_nondet_uchar() [L64] input_79 = __VERIFIER_nondet_uchar() [L65] input_89 = __VERIFIER_nondet_uchar() [L66] input_96 = __VERIFIER_nondet_uchar() [L69] SORT_1 var_16_arg_0 = var_6; [L70] SORT_1 var_16_arg_1 = state_14; [L71] SORT_1 var_16_arg_2 = state_12; [L72] EXPR var_16_arg_0 ? var_16_arg_1 : var_16_arg_2 [L72] SORT_1 var_16 = var_16_arg_0 ? var_16_arg_1 : var_16_arg_2; [L73] SORT_1 var_11_arg_0 = var_6; [L74] SORT_1 var_11_arg_1 = state_9; [L75] SORT_1 var_11_arg_2 = state_7; [L76] EXPR var_11_arg_0 ? var_11_arg_1 : var_11_arg_2 [L76] SORT_1 var_11 = var_11_arg_0 ? var_11_arg_1 : var_11_arg_2; [L77] SORT_1 var_17_arg_0 = var_6; [L78] SORT_1 var_17_arg_1 = var_16; [L79] SORT_1 var_17_arg_2 = var_11; [L80] EXPR var_17_arg_0 ? var_17_arg_1 : var_17_arg_2 [L80] SORT_1 var_17 = var_17_arg_0 ? var_17_arg_1 : var_17_arg_2; [L81] SORT_1 var_20_arg_0 = var_18; [L82] SORT_1 var_20_arg_1 = state_14; [L83] SORT_1 var_20_arg_2 = state_12; [L84] EXPR var_20_arg_0 ? var_20_arg_1 : var_20_arg_2 [L84] SORT_1 var_20 = var_20_arg_0 ? var_20_arg_1 : var_20_arg_2; [L85] SORT_1 var_19_arg_0 = var_18; [L86] SORT_1 var_19_arg_1 = state_9; [L87] SORT_1 var_19_arg_2 = state_7; [L88] EXPR var_19_arg_0 ? var_19_arg_1 : var_19_arg_2 [L88] SORT_1 var_19 = var_19_arg_0 ? var_19_arg_1 : var_19_arg_2; [L89] SORT_1 var_21_arg_0 = var_6; [L90] SORT_1 var_21_arg_1 = var_20; [L91] SORT_1 var_21_arg_2 = var_19; [L92] EXPR var_21_arg_0 ? var_21_arg_1 : var_21_arg_2 [L92] SORT_1 var_21 = var_21_arg_0 ? var_21_arg_1 : var_21_arg_2; [L93] SORT_1 var_22_arg_0 = var_17; [L94] SORT_1 var_22_arg_1 = var_21; [L95] SORT_1 var_22 = var_22_arg_0 & var_22_arg_1; [L96] SORT_1 var_23_arg_0 = var_22; [L97] SORT_1 var_23 = ~var_23_arg_0; [L98] SORT_1 var_25_arg_0 = var_6; [L99] SORT_1 var_25_arg_1 = state_14; [L100] SORT_1 var_25_arg_2 = state_12; [L101] EXPR var_25_arg_0 ? var_25_arg_1 : var_25_arg_2 [L101] SORT_1 var_25 = var_25_arg_0 ? var_25_arg_1 : var_25_arg_2; [L102] SORT_1 var_24_arg_0 = var_6; [L103] SORT_1 var_24_arg_1 = state_9; [L104] SORT_1 var_24_arg_2 = state_7; [L105] EXPR var_24_arg_0 ? var_24_arg_1 : var_24_arg_2 [L105] SORT_1 var_24 = var_24_arg_0 ? var_24_arg_1 : var_24_arg_2; [L106] SORT_1 var_26_arg_0 = var_6; [L107] SORT_1 var_26_arg_1 = var_25; [L108] SORT_1 var_26_arg_2 = var_24; [L109] EXPR var_26_arg_0 ? var_26_arg_1 : var_26_arg_2 [L109] SORT_1 var_26 = var_26_arg_0 ? var_26_arg_1 : var_26_arg_2; [L110] SORT_1 var_28_arg_0 = var_6; [L111] SORT_1 var_28_arg_1 = state_14; [L112] SORT_1 var_28_arg_2 = state_12; [L113] EXPR var_28_arg_0 ? var_28_arg_1 : var_28_arg_2 [L113] SORT_1 var_28 = var_28_arg_0 ? var_28_arg_1 : var_28_arg_2; [L114] SORT_1 var_27_arg_0 = var_6; [L115] SORT_1 var_27_arg_1 = state_9; [L116] SORT_1 var_27_arg_2 = state_7; [L117] EXPR var_27_arg_0 ? var_27_arg_1 : var_27_arg_2 [L117] SORT_1 var_27 = var_27_arg_0 ? var_27_arg_1 : var_27_arg_2; [L118] SORT_1 var_29_arg_0 = var_18; [L119] SORT_1 var_29_arg_1 = var_28; [L120] SORT_1 var_29_arg_2 = var_27; [L121] EXPR var_29_arg_0 ? var_29_arg_1 : var_29_arg_2 [L121] SORT_1 var_29 = var_29_arg_0 ? var_29_arg_1 : var_29_arg_2; [L122] SORT_1 var_30_arg_0 = var_26; [L123] SORT_1 var_30_arg_1 = var_29; [L124] SORT_1 var_30 = var_30_arg_0 & var_30_arg_1; [L125] SORT_1 var_31_arg_0 = var_30; [L126] SORT_1 var_31 = ~var_31_arg_0; [L127] SORT_1 var_32_arg_0 = var_23; [L128] SORT_1 var_32_arg_1 = var_31; [L129] SORT_1 var_32 = var_32_arg_0 & var_32_arg_1; [L130] SORT_1 var_34_arg_0 = var_6; [L131] SORT_1 var_34_arg_1 = state_14; [L132] SORT_1 var_34_arg_2 = state_12; [L133] EXPR var_34_arg_0 ? var_34_arg_1 : var_34_arg_2 [L133] SORT_1 var_34 = var_34_arg_0 ? var_34_arg_1 : var_34_arg_2; [L134] SORT_1 var_33_arg_0 = var_6; [L135] SORT_1 var_33_arg_1 = state_9; [L136] SORT_1 var_33_arg_2 = state_7; [L137] EXPR var_33_arg_0 ? var_33_arg_1 : var_33_arg_2 [L137] SORT_1 var_33 = var_33_arg_0 ? var_33_arg_1 : var_33_arg_2; [L138] SORT_1 var_35_arg_0 = var_6; [L139] SORT_1 var_35_arg_1 = var_34; [L140] SORT_1 var_35_arg_2 = var_33; [L141] EXPR var_35_arg_0 ? var_35_arg_1 : var_35_arg_2 [L141] SORT_1 var_35 = var_35_arg_0 ? var_35_arg_1 : var_35_arg_2; [L142] SORT_1 var_37_arg_0 = var_18; [L143] SORT_1 var_37_arg_1 = state_14; [L144] SORT_1 var_37_arg_2 = state_12; [L145] EXPR var_37_arg_0 ? var_37_arg_1 : var_37_arg_2 [L145] SORT_1 var_37 = var_37_arg_0 ? var_37_arg_1 : var_37_arg_2; [L146] SORT_1 var_36_arg_0 = var_18; [L147] SORT_1 var_36_arg_1 = state_9; [L148] SORT_1 var_36_arg_2 = state_7; [L149] EXPR var_36_arg_0 ? var_36_arg_1 : var_36_arg_2 [L149] SORT_1 var_36 = var_36_arg_0 ? var_36_arg_1 : var_36_arg_2; [L150] SORT_1 var_38_arg_0 = var_18; [L151] SORT_1 var_38_arg_1 = var_37; [L152] SORT_1 var_38_arg_2 = var_36; [L153] EXPR var_38_arg_0 ? var_38_arg_1 : var_38_arg_2 [L153] SORT_1 var_38 = var_38_arg_0 ? var_38_arg_1 : var_38_arg_2; [L154] SORT_1 var_39_arg_0 = var_35; [L155] SORT_1 var_39_arg_1 = var_38; [L156] SORT_1 var_39 = var_39_arg_0 & var_39_arg_1; [L157] SORT_1 var_40_arg_0 = var_39; [L158] SORT_1 var_40 = ~var_40_arg_0; [L159] SORT_1 var_41_arg_0 = var_32; [L160] SORT_1 var_41_arg_1 = var_40; [L161] SORT_1 var_41 = var_41_arg_0 & var_41_arg_1; [L162] SORT_1 var_43_arg_0 = var_18; [L163] SORT_1 var_43_arg_1 = state_14; [L164] SORT_1 var_43_arg_2 = state_12; [L165] EXPR var_43_arg_0 ? var_43_arg_1 : var_43_arg_2 [L165] SORT_1 var_43 = var_43_arg_0 ? var_43_arg_1 : var_43_arg_2; [L166] SORT_1 var_42_arg_0 = var_18; [L167] SORT_1 var_42_arg_1 = state_9; [L168] SORT_1 var_42_arg_2 = state_7; [L169] EXPR var_42_arg_0 ? var_42_arg_1 : var_42_arg_2 [L169] SORT_1 var_42 = var_42_arg_0 ? var_42_arg_1 : var_42_arg_2; [L170] SORT_1 var_44_arg_0 = var_6; [L171] SORT_1 var_44_arg_1 = var_43; [L172] SORT_1 var_44_arg_2 = var_42; [L173] EXPR var_44_arg_0 ? var_44_arg_1 : var_44_arg_2 [L173] SORT_1 var_44 = var_44_arg_0 ? var_44_arg_1 : var_44_arg_2; [L174] SORT_1 var_46_arg_0 = var_6; [L175] SORT_1 var_46_arg_1 = state_14; [L176] SORT_1 var_46_arg_2 = state_12; [L177] EXPR var_46_arg_0 ? var_46_arg_1 : var_46_arg_2 [L177] SORT_1 var_46 = var_46_arg_0 ? var_46_arg_1 : var_46_arg_2; [L178] SORT_1 var_45_arg_0 = var_6; [L179] SORT_1 var_45_arg_1 = state_9; [L180] SORT_1 var_45_arg_2 = state_7; [L181] EXPR var_45_arg_0 ? var_45_arg_1 : var_45_arg_2 [L181] SORT_1 var_45 = var_45_arg_0 ? var_45_arg_1 : var_45_arg_2; [L182] SORT_1 var_47_arg_0 = var_18; [L183] SORT_1 var_47_arg_1 = var_46; [L184] SORT_1 var_47_arg_2 = var_45; [L185] EXPR var_47_arg_0 ? var_47_arg_1 : var_47_arg_2 [L185] SORT_1 var_47 = var_47_arg_0 ? var_47_arg_1 : var_47_arg_2; [L186] SORT_1 var_48_arg_0 = var_44; [L187] SORT_1 var_48_arg_1 = var_47; [L188] SORT_1 var_48 = var_48_arg_0 & var_48_arg_1; [L189] SORT_1 var_49_arg_0 = var_48; [L190] SORT_1 var_49 = ~var_49_arg_0; [L191] SORT_1 var_50_arg_0 = var_41; [L192] SORT_1 var_50_arg_1 = var_49; [L193] SORT_1 var_50 = var_50_arg_0 & var_50_arg_1; [L194] SORT_1 var_52_arg_0 = var_18; [L195] SORT_1 var_52_arg_1 = state_14; [L196] SORT_1 var_52_arg_2 = state_12; [L197] EXPR var_52_arg_0 ? var_52_arg_1 : var_52_arg_2 [L197] SORT_1 var_52 = var_52_arg_0 ? var_52_arg_1 : var_52_arg_2; [L198] SORT_1 var_51_arg_0 = var_18; [L199] SORT_1 var_51_arg_1 = state_9; [L200] SORT_1 var_51_arg_2 = state_7; [L201] EXPR var_51_arg_0 ? var_51_arg_1 : var_51_arg_2 [L201] SORT_1 var_51 = var_51_arg_0 ? var_51_arg_1 : var_51_arg_2; [L202] SORT_1 var_53_arg_0 = var_6; [L203] SORT_1 var_53_arg_1 = var_52; [L204] SORT_1 var_53_arg_2 = var_51; [L205] EXPR var_53_arg_0 ? var_53_arg_1 : var_53_arg_2 [L205] SORT_1 var_53 = var_53_arg_0 ? var_53_arg_1 : var_53_arg_2; [L206] SORT_1 var_55_arg_0 = var_18; [L207] SORT_1 var_55_arg_1 = state_14; [L208] SORT_1 var_55_arg_2 = state_12; [L209] EXPR var_55_arg_0 ? var_55_arg_1 : var_55_arg_2 [L209] SORT_1 var_55 = var_55_arg_0 ? var_55_arg_1 : var_55_arg_2; [L210] SORT_1 var_54_arg_0 = var_18; [L211] SORT_1 var_54_arg_1 = state_9; [L212] SORT_1 var_54_arg_2 = state_7; [L213] EXPR var_54_arg_0 ? var_54_arg_1 : var_54_arg_2 [L213] SORT_1 var_54 = var_54_arg_0 ? var_54_arg_1 : var_54_arg_2; [L214] SORT_1 var_56_arg_0 = var_18; [L215] SORT_1 var_56_arg_1 = var_55; [L216] SORT_1 var_56_arg_2 = var_54; [L217] EXPR var_56_arg_0 ? var_56_arg_1 : var_56_arg_2 [L217] SORT_1 var_56 = var_56_arg_0 ? var_56_arg_1 : var_56_arg_2; [L218] SORT_1 var_57_arg_0 = var_53; [L219] SORT_1 var_57_arg_1 = var_56; [L220] SORT_1 var_57 = var_57_arg_0 & var_57_arg_1; [L221] SORT_1 var_58_arg_0 = var_57; [L222] SORT_1 var_58 = ~var_58_arg_0; [L223] SORT_1 var_59_arg_0 = var_50; [L224] SORT_1 var_59_arg_1 = var_58; [L225] SORT_1 var_59 = var_59_arg_0 & var_59_arg_1; [L226] SORT_1 var_61_arg_0 = var_6; [L227] SORT_1 var_61_arg_1 = state_14; [L228] SORT_1 var_61_arg_2 = state_12; [L229] EXPR var_61_arg_0 ? var_61_arg_1 : var_61_arg_2 [L229] SORT_1 var_61 = var_61_arg_0 ? var_61_arg_1 : var_61_arg_2; [L230] SORT_1 var_60_arg_0 = var_6; [L231] SORT_1 var_60_arg_1 = state_9; [L232] SORT_1 var_60_arg_2 = state_7; [L233] EXPR var_60_arg_0 ? var_60_arg_1 : var_60_arg_2 [L233] SORT_1 var_60 = var_60_arg_0 ? var_60_arg_1 : var_60_arg_2; [L234] SORT_1 var_62_arg_0 = var_18; [L235] SORT_1 var_62_arg_1 = var_61; [L236] SORT_1 var_62_arg_2 = var_60; [L237] EXPR var_62_arg_0 ? var_62_arg_1 : var_62_arg_2 [L237] SORT_1 var_62 = var_62_arg_0 ? var_62_arg_1 : var_62_arg_2; [L238] SORT_1 var_64_arg_0 = var_18; [L239] SORT_1 var_64_arg_1 = state_14; [L240] SORT_1 var_64_arg_2 = state_12; [L241] EXPR var_64_arg_0 ? var_64_arg_1 : var_64_arg_2 [L241] SORT_1 var_64 = var_64_arg_0 ? var_64_arg_1 : var_64_arg_2; [L242] SORT_1 var_63_arg_0 = var_18; [L243] SORT_1 var_63_arg_1 = state_9; [L244] SORT_1 var_63_arg_2 = state_7; [L245] EXPR var_63_arg_0 ? var_63_arg_1 : var_63_arg_2 [L245] SORT_1 var_63 = var_63_arg_0 ? var_63_arg_1 : var_63_arg_2; [L246] SORT_1 var_65_arg_0 = var_18; [L247] SORT_1 var_65_arg_1 = var_64; [L248] SORT_1 var_65_arg_2 = var_63; [L249] EXPR var_65_arg_0 ? var_65_arg_1 : var_65_arg_2 [L249] SORT_1 var_65 = var_65_arg_0 ? var_65_arg_1 : var_65_arg_2; [L250] SORT_1 var_66_arg_0 = var_62; [L251] SORT_1 var_66_arg_1 = var_65; [L252] SORT_1 var_66 = var_66_arg_0 & var_66_arg_1; [L253] SORT_1 var_67_arg_0 = var_66; [L254] SORT_1 var_67 = ~var_67_arg_0; [L255] SORT_1 var_68_arg_0 = var_59; [L256] SORT_1 var_68_arg_1 = var_67; [L257] SORT_1 var_68 = var_68_arg_0 & var_68_arg_1; [L258] SORT_1 var_71_arg_0 = var_68; [L259] SORT_1 var_71 = ~var_71_arg_0; [L260] SORT_1 var_72_arg_0 = var_18; [L261] SORT_1 var_72_arg_1 = var_71; [L262] SORT_1 var_72 = var_72_arg_0 & var_72_arg_1; [L263] var_72 = var_72 & mask_SORT_1 [L264] SORT_1 bad_73_arg_0 = var_72; [L265] CALL __VERIFIER_assert(!(bad_73_arg_0)) [L20] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L20] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.4s, 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, 0.7s 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 03:43:53,406 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with 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_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/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_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.client_server.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/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_918e6cca-8261-431d-8f44-92983ef07c96/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 2efa62b5c78d9a8e6cb22bbcfab0dad1178c73ba328a91d31f235444a8b17b87 --- 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 03:43:55,616 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:43:55,619 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:43:55,663 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:43:55,663 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:43:55,668 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:43:55,670 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:43:55,675 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:43:55,680 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:43:55,688 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:43:55,690 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:43:55,691 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:43:55,692 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:43:55,695 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:43:55,697 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:43:55,698 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:43:55,700 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:43:55,700 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:43:55,701 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:43:55,703 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:43:55,704 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:43:55,706 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:43:55,707 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:43:55,708 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:43:55,711 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:43:55,711 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:43:55,712 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:43:55,713 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:43:55,713 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:43:55,714 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:43:55,715 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:43:55,715 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:43:55,716 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:43:55,717 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:43:55,718 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:43:55,718 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:43:55,719 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:43:55,720 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:43:55,720 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:43:55,721 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:43:55,722 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:43:55,723 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2022-11-03 03:43:55,744 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:43:55,744 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:43:55,745 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:43:55,745 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:43:55,746 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:43:55,746 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:43:55,746 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:43:55,746 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:43:55,747 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:43:55,747 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:43:55,747 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:43:55,747 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:43:55,748 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:43:55,748 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:43:55,749 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 03:43:55,749 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:43:55,749 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 03:43:55,749 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 03:43:55,750 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 03:43:55,750 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 03:43:55,750 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 03:43:55,750 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:43:55,750 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 03:43:55,751 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:43:55,751 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 03:43:55,751 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:43:55,751 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:43:55,752 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:43:55,752 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:43:55,752 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 03:43:55,752 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 03:43:55,753 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 03:43:55,753 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 03:43:55,753 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:43:55,753 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 03:43:55,758 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_918e6cca-8261-431d-8f44-92983ef07c96/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2efa62b5c78d9a8e6cb22bbcfab0dad1178c73ba328a91d31f235444a8b17b87 [2022-11-03 03:43:56,180 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:43:56,213 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:43:56,218 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:43:56,220 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:43:56,221 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:43:56,222 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.client_server.c [2022-11-03 03:43:56,301 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/data/8015dc00d/9a783839254c44f7abd2a4c501cace53/FLAGdaaa48ec1 [2022-11-03 03:43:56,928 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:43:56,932 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.client_server.c [2022-11-03 03:43:56,944 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/data/8015dc00d/9a783839254c44f7abd2a4c501cace53/FLAGdaaa48ec1 [2022-11-03 03:43:57,241 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/data/8015dc00d/9a783839254c44f7abd2a4c501cace53 [2022-11-03 03:43:57,245 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:43:57,247 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:43:57,254 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:43:57,255 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:43:57,259 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:43:57,259 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:43:57" (1/1) ... [2022-11-03 03:43:57,260 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2074da4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:57, skipping insertion in model container [2022-11-03 03:43:57,261 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:43:57" (1/1) ... [2022-11-03 03:43:57,268 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:43:57,305 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:43:57,459 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_918e6cca-8261-431d-8f44-92983ef07c96/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.client_server.c[1107,1120] [2022-11-03 03:43:57,662 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:43:57,666 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:43:57,677 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_918e6cca-8261-431d-8f44-92983ef07c96/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.client_server.c[1107,1120] [2022-11-03 03:43:57,810 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:43:57,822 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:43:57,823 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:57 WrapperNode [2022-11-03 03:43:57,823 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:43:57,824 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:43:57,824 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:43:57,824 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:43:57,832 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:57" (1/1) ... [2022-11-03 03:43:57,859 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:57" (1/1) ... [2022-11-03 03:43:57,924 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 663 [2022-11-03 03:43:57,924 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:43:57,925 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:43:57,925 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:43:57,925 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:43:57,943 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:57" (1/1) ... [2022-11-03 03:43:57,944 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:57" (1/1) ... [2022-11-03 03:43:57,972 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:57" (1/1) ... [2022-11-03 03:43:57,982 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:57" (1/1) ... [2022-11-03 03:43:57,995 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:57" (1/1) ... [2022-11-03 03:43:58,016 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:57" (1/1) ... [2022-11-03 03:43:58,019 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:57" (1/1) ... [2022-11-03 03:43:58,036 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:57" (1/1) ... [2022-11-03 03:43:58,041 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:43:58,042 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:43:58,043 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:43:58,043 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:43:58,044 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:57" (1/1) ... [2022-11-03 03:43:58,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:43:58,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:43:58,074 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:43:58,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:43:58,132 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:43:58,132 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:43:58,365 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:43:58,368 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:43:59,140 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:43:59,148 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:43:59,148 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 03:43:59,150 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:43:59 BoogieIcfgContainer [2022-11-03 03:43:59,150 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:43:59,152 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:43:59,152 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:43:59,156 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:43:59,156 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:43:57" (1/3) ... [2022-11-03 03:43:59,156 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e4fb996 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:43:59, skipping insertion in model container [2022-11-03 03:43:59,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:57" (2/3) ... [2022-11-03 03:43:59,157 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e4fb996 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:43:59, skipping insertion in model container [2022-11-03 03:43:59,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:43:59" (3/3) ... [2022-11-03 03:43:59,158 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.client_server.c [2022-11-03 03:43:59,177 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:43:59,177 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 03:43:59,230 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:43:59,236 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;@1aff36bb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:43:59,237 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 03:43:59,246 INFO L276 IsEmpty]: Start isEmpty. Operand has 121 states, 119 states have (on average 1.495798319327731) internal successors, (178), 120 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:43:59,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-03 03:43:59,256 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:43:59,257 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:43:59,257 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:43:59,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:43:59,263 INFO L85 PathProgramCache]: Analyzing trace with hash 673019217, now seen corresponding path program 1 times [2022-11-03 03:43:59,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:43:59,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [848415104] [2022-11-03 03:43:59,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:43:59,283 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:43:59,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:43:59,289 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:43:59,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 03:43:59,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:43:59,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:43:59,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:43:59,726 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 03:43:59,726 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:43:59,727 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:43:59,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [848415104] [2022-11-03 03:43:59,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [848415104] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:43:59,728 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:43:59,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:43:59,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177375852] [2022-11-03 03:43:59,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:43:59,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:43:59,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:43:59,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:43:59,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:43:59,788 INFO L87 Difference]: Start difference. First operand has 121 states, 119 states have (on average 1.495798319327731) internal successors, (178), 120 states have internal predecessors, (178), 0 states have call successors, (0), 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 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:43:59,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:43:59,951 INFO L93 Difference]: Finished difference Result 237 states and 354 transitions. [2022-11-03 03:43:59,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:43:59,954 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2022-11-03 03:43:59,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:43:59,968 INFO L225 Difference]: With dead ends: 237 [2022-11-03 03:43:59,968 INFO L226 Difference]: Without dead ends: 118 [2022-11-03 03:43:59,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 74 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 03:43:59,976 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 337 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:43:59,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [337 Valid, 150 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:43:59,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-11-03 03:44:00,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2022-11-03 03:44:00,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.4741379310344827) internal successors, (171), 116 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:00,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 171 transitions. [2022-11-03 03:44:00,021 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 171 transitions. Word has length 77 [2022-11-03 03:44:00,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:44:00,021 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 171 transitions. [2022-11-03 03:44:00,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:00,022 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 171 transitions. [2022-11-03 03:44:00,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-03 03:44:00,024 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:44:00,024 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:44:00,041 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-11-03 03:44:00,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:44:00,237 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:44:00,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:44:00,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1560242063, now seen corresponding path program 1 times [2022-11-03 03:44:00,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:44:00,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [222660816] [2022-11-03 03:44:00,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:44:00,239 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:44:00,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:44:00,241 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:44:00,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 03:44:00,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:44:00,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:44:00,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:44:00,573 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 03:44:00,578 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:44:00,583 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:44:00,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [222660816] [2022-11-03 03:44:00,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [222660816] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:44:00,584 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:44:00,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:44:00,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876340354] [2022-11-03 03:44:00,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:44:00,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:44:00,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:44:00,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:44:00,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:44:00,588 INFO L87 Difference]: Start difference. First operand 117 states and 171 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:00,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:44:00,690 INFO L93 Difference]: Finished difference Result 235 states and 343 transitions. [2022-11-03 03:44:00,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:44:00,691 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2022-11-03 03:44:00,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:44:00,692 INFO L225 Difference]: With dead ends: 235 [2022-11-03 03:44:00,693 INFO L226 Difference]: Without dead ends: 120 [2022-11-03 03:44:00,702 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 74 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 03:44:00,704 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 333 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:44:00,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [333 Valid, 151 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:44:00,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-11-03 03:44:00,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 117. [2022-11-03 03:44:00,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.4655172413793103) internal successors, (170), 116 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:00,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 170 transitions. [2022-11-03 03:44:00,723 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 170 transitions. Word has length 77 [2022-11-03 03:44:00,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:44:00,723 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 170 transitions. [2022-11-03 03:44:00,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:00,724 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 170 transitions. [2022-11-03 03:44:00,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-03 03:44:00,725 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:44:00,725 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:44:00,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 03:44:00,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:44:00,929 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:44:00,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:44:00,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1637142861, now seen corresponding path program 1 times [2022-11-03 03:44:00,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:44:00,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [769220247] [2022-11-03 03:44:00,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:44:00,931 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:44:00,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:44:00,932 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:44:00,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 03:44:01,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:44:01,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:44:01,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:44:01,224 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 03:44:01,224 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:44:01,224 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:44:01,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [769220247] [2022-11-03 03:44:01,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [769220247] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:44:01,225 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:44:01,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:44:01,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129638081] [2022-11-03 03:44:01,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:44:01,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:44:01,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:44:01,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:44:01,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:44:01,227 INFO L87 Difference]: Start difference. First operand 117 states and 170 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:01,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:44:01,291 INFO L93 Difference]: Finished difference Result 237 states and 343 transitions. [2022-11-03 03:44:01,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:44:01,291 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2022-11-03 03:44:01,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:44:01,292 INFO L225 Difference]: With dead ends: 237 [2022-11-03 03:44:01,292 INFO L226 Difference]: Without dead ends: 122 [2022-11-03 03:44:01,293 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 74 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 03:44:01,294 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 329 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:44:01,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [329 Valid, 152 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:44:01,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-11-03 03:44:01,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 117. [2022-11-03 03:44:01,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.456896551724138) internal successors, (169), 116 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:01,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 169 transitions. [2022-11-03 03:44:01,307 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 169 transitions. Word has length 77 [2022-11-03 03:44:01,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:44:01,308 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 169 transitions. [2022-11-03 03:44:01,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:01,308 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 169 transitions. [2022-11-03 03:44:01,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-03 03:44:01,310 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:44:01,310 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:44:01,330 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-03 03:44:01,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:44:01,518 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:44:01,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:44:01,519 INFO L85 PathProgramCache]: Analyzing trace with hash -749366645, now seen corresponding path program 1 times [2022-11-03 03:44:01,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:44:01,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [291087596] [2022-11-03 03:44:01,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:44:01,520 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:44:01,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:44:01,521 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:44:01,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-03 03:44:01,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:44:01,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:44:01,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:44:01,825 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 03:44:01,825 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:44:01,825 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:44:01,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [291087596] [2022-11-03 03:44:01,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [291087596] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:44:01,831 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:44:01,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:44:01,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626535864] [2022-11-03 03:44:01,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:44:01,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:44:01,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:44:01,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:44:01,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:44:01,833 INFO L87 Difference]: Start difference. First operand 117 states and 169 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:01,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:44:01,913 INFO L93 Difference]: Finished difference Result 243 states and 349 transitions. [2022-11-03 03:44:01,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:44:01,914 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2022-11-03 03:44:01,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:44:01,921 INFO L225 Difference]: With dead ends: 243 [2022-11-03 03:44:01,921 INFO L226 Difference]: Without dead ends: 128 [2022-11-03 03:44:01,927 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 74 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 03:44:01,931 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 321 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:44:01,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [321 Valid, 165 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:44:01,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-11-03 03:44:01,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 117. [2022-11-03 03:44:01,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.4482758620689655) internal successors, (168), 116 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:01,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 168 transitions. [2022-11-03 03:44:01,951 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 168 transitions. Word has length 77 [2022-11-03 03:44:01,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:44:01,952 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 168 transitions. [2022-11-03 03:44:01,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:01,952 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 168 transitions. [2022-11-03 03:44:01,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-03 03:44:01,960 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:44:01,960 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:44:01,978 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-03 03:44:02,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:44:02,161 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:44:02,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:44:02,162 INFO L85 PathProgramCache]: Analyzing trace with hash -803759543, now seen corresponding path program 1 times [2022-11-03 03:44:02,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:44:02,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1437241274] [2022-11-03 03:44:02,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:44:02,163 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:44:02,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:44:02,164 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:44:02,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-03 03:44:02,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:44:02,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:44:02,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:44:02,411 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 03:44:02,412 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:44:02,412 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:44:02,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1437241274] [2022-11-03 03:44:02,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1437241274] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:44:02,413 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:44:02,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:44:02,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803231806] [2022-11-03 03:44:02,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:44:02,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:44:02,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:44:02,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:44:02,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:44:02,415 INFO L87 Difference]: Start difference. First operand 117 states and 168 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:02,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:44:02,487 INFO L93 Difference]: Finished difference Result 245 states and 349 transitions. [2022-11-03 03:44:02,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:44:02,488 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2022-11-03 03:44:02,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:44:02,489 INFO L225 Difference]: With dead ends: 245 [2022-11-03 03:44:02,489 INFO L226 Difference]: Without dead ends: 130 [2022-11-03 03:44:02,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 74 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 03:44:02,491 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 317 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:44:02,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [317 Valid, 166 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:44:02,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-11-03 03:44:02,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 117. [2022-11-03 03:44:02,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.4396551724137931) internal successors, (167), 116 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:02,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 167 transitions. [2022-11-03 03:44:02,499 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 167 transitions. Word has length 77 [2022-11-03 03:44:02,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:44:02,500 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 167 transitions. [2022-11-03 03:44:02,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:02,500 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 167 transitions. [2022-11-03 03:44:02,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-03 03:44:02,501 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:44:02,502 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:44:02,522 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2022-11-03 03:44:02,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:44:02,714 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:44:02,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:44:02,715 INFO L85 PathProgramCache]: Analyzing trace with hash -124487289, now seen corresponding path program 1 times [2022-11-03 03:44:02,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:44:02,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [14225849] [2022-11-03 03:44:02,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:44:02,716 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:44:02,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:44:02,717 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:44:02,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-03 03:44:02,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:44:02,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:44:02,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:44:02,986 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 03:44:02,987 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:44:02,987 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:44:02,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [14225849] [2022-11-03 03:44:02,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [14225849] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:44:02,987 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:44:02,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:44:02,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593004750] [2022-11-03 03:44:02,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:44:02,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:44:02,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:44:02,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:44:02,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:44:02,990 INFO L87 Difference]: Start difference. First operand 117 states and 167 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:03,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:44:03,058 INFO L93 Difference]: Finished difference Result 249 states and 352 transitions. [2022-11-03 03:44:03,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:44:03,059 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2022-11-03 03:44:03,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:44:03,060 INFO L225 Difference]: With dead ends: 249 [2022-11-03 03:44:03,060 INFO L226 Difference]: Without dead ends: 134 [2022-11-03 03:44:03,060 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 74 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 03:44:03,061 INFO L413 NwaCegarLoop]: 156 mSDtfsCounter, 311 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:44:03,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [311 Valid, 171 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:44:03,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-11-03 03:44:03,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 117. [2022-11-03 03:44:03,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.4310344827586208) internal successors, (166), 116 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:03,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 166 transitions. [2022-11-03 03:44:03,069 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 166 transitions. Word has length 77 [2022-11-03 03:44:03,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:44:03,069 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 166 transitions. [2022-11-03 03:44:03,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:03,070 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 166 transitions. [2022-11-03 03:44:03,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-03 03:44:03,071 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:44:03,071 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:44:03,091 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-03 03:44:03,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:44:03,292 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:44:03,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:44:03,292 INFO L85 PathProgramCache]: Analyzing trace with hash 309241797, now seen corresponding path program 1 times [2022-11-03 03:44:03,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:44:03,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [986282540] [2022-11-03 03:44:03,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:44:03,293 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:44:03,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:44:03,294 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:44:03,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-03 03:44:03,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:44:03,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:44:03,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:44:03,553 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 03:44:03,554 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:44:03,555 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:44:03,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [986282540] [2022-11-03 03:44:03,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [986282540] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:44:03,555 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:44:03,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:44:03,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509619747] [2022-11-03 03:44:03,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:44:03,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:44:03,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:44:03,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:44:03,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:44:03,557 INFO L87 Difference]: Start difference. First operand 117 states and 166 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:03,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:44:03,633 INFO L93 Difference]: Finished difference Result 251 states and 352 transitions. [2022-11-03 03:44:03,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:44:03,634 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2022-11-03 03:44:03,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:44:03,635 INFO L225 Difference]: With dead ends: 251 [2022-11-03 03:44:03,635 INFO L226 Difference]: Without dead ends: 136 [2022-11-03 03:44:03,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 74 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 03:44:03,638 INFO L413 NwaCegarLoop]: 156 mSDtfsCounter, 307 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 172 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 03:44:03,638 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [307 Valid, 172 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:44:03,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-11-03 03:44:03,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 117. [2022-11-03 03:44:03,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.4224137931034482) internal successors, (165), 116 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:03,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 165 transitions. [2022-11-03 03:44:03,661 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 165 transitions. Word has length 77 [2022-11-03 03:44:03,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:44:03,662 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 165 transitions. [2022-11-03 03:44:03,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:03,662 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 165 transitions. [2022-11-03 03:44:03,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-03 03:44:03,669 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:44:03,669 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:44:03,689 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-03 03:44:03,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:44:03,870 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:44:03,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:44:03,871 INFO L85 PathProgramCache]: Analyzing trace with hash 349916547, now seen corresponding path program 1 times [2022-11-03 03:44:03,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:44:03,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2098163710] [2022-11-03 03:44:03,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:44:03,871 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:44:03,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:44:03,873 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:44:03,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-03 03:44:04,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:44:04,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:44:04,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:44:04,109 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 03:44:04,110 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:44:04,110 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:44:04,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2098163710] [2022-11-03 03:44:04,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2098163710] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:44:04,110 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:44:04,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:44:04,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083298646] [2022-11-03 03:44:04,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:44:04,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:44:04,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:44:04,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:44:04,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:44:04,112 INFO L87 Difference]: Start difference. First operand 117 states and 165 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:04,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:44:04,188 INFO L93 Difference]: Finished difference Result 253 states and 352 transitions. [2022-11-03 03:44:04,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:44:04,189 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2022-11-03 03:44:04,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:44:04,190 INFO L225 Difference]: With dead ends: 253 [2022-11-03 03:44:04,190 INFO L226 Difference]: Without dead ends: 138 [2022-11-03 03:44:04,190 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 74 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 03:44:04,191 INFO L413 NwaCegarLoop]: 156 mSDtfsCounter, 303 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:44:04,191 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [303 Valid, 173 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:44:04,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-11-03 03:44:04,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 117. [2022-11-03 03:44:04,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.4137931034482758) internal successors, (164), 116 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:04,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 164 transitions. [2022-11-03 03:44:04,196 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 164 transitions. Word has length 77 [2022-11-03 03:44:04,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:44:04,197 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 164 transitions. [2022-11-03 03:44:04,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:04,197 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 164 transitions. [2022-11-03 03:44:04,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-03 03:44:04,198 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:44:04,198 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:44:04,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-03 03:44:04,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:44:04,411 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:44:04,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:44:04,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1225935553, now seen corresponding path program 1 times [2022-11-03 03:44:04,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:44:04,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [763065315] [2022-11-03 03:44:04,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:44:04,412 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:44:04,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:44:04,413 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:44:04,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-03 03:44:04,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:44:04,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:44:04,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:44:04,666 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 03:44:04,667 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:44:04,667 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:44:04,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [763065315] [2022-11-03 03:44:04,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [763065315] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:44:04,667 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:44:04,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:44:04,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905310704] [2022-11-03 03:44:04,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:44:04,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:44:04,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:44:04,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:44:04,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:44:04,670 INFO L87 Difference]: Start difference. First operand 117 states and 164 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:04,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:44:04,754 INFO L93 Difference]: Finished difference Result 257 states and 355 transitions. [2022-11-03 03:44:04,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:44:04,755 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2022-11-03 03:44:04,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:44:04,756 INFO L225 Difference]: With dead ends: 257 [2022-11-03 03:44:04,757 INFO L226 Difference]: Without dead ends: 142 [2022-11-03 03:44:04,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 74 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 03:44:04,760 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 297 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:44:04,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [297 Valid, 180 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:44:04,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-11-03 03:44:04,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 117. [2022-11-03 03:44:04,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.4051724137931034) internal successors, (163), 116 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:04,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 163 transitions. [2022-11-03 03:44:04,765 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 163 transitions. Word has length 77 [2022-11-03 03:44:04,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:44:04,766 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 163 transitions. [2022-11-03 03:44:04,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:04,766 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 163 transitions. [2022-11-03 03:44:04,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-03 03:44:04,767 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:44:04,767 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:44:04,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-03 03:44:04,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:44:04,982 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:44:04,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:44:04,983 INFO L85 PathProgramCache]: Analyzing trace with hash 744855295, now seen corresponding path program 1 times [2022-11-03 03:44:04,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:44:04,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [879487747] [2022-11-03 03:44:04,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:44:04,983 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:44:04,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:44:04,984 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:44:04,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-03 03:44:05,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:44:05,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:44:05,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:44:05,226 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 03:44:05,227 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:44:05,227 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:44:05,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [879487747] [2022-11-03 03:44:05,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [879487747] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:44:05,227 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:44:05,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:44:05,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395718775] [2022-11-03 03:44:05,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:44:05,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:44:05,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:44:05,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:44:05,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:44:05,232 INFO L87 Difference]: Start difference. First operand 117 states and 163 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:05,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:44:05,312 INFO L93 Difference]: Finished difference Result 259 states and 355 transitions. [2022-11-03 03:44:05,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:44:05,313 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2022-11-03 03:44:05,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:44:05,316 INFO L225 Difference]: With dead ends: 259 [2022-11-03 03:44:05,316 INFO L226 Difference]: Without dead ends: 144 [2022-11-03 03:44:05,317 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 74 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 03:44:05,317 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 293 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:44:05,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [293 Valid, 181 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:44:05,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-11-03 03:44:05,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 117. [2022-11-03 03:44:05,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.396551724137931) internal successors, (162), 116 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:05,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 162 transitions. [2022-11-03 03:44:05,326 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 162 transitions. Word has length 77 [2022-11-03 03:44:05,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:44:05,327 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 162 transitions. [2022-11-03 03:44:05,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:05,327 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 162 transitions. [2022-11-03 03:44:05,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-03 03:44:05,328 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:44:05,328 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:44:05,344 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-03 03:44:05,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:44:05,545 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:44:05,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:44:05,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1610949955, now seen corresponding path program 1 times [2022-11-03 03:44:05,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:44:05,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1228255327] [2022-11-03 03:44:05,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:44:05,546 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:44:05,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:44:05,547 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:44:05,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-03 03:44:05,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:44:05,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:44:05,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:44:05,838 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 03:44:05,839 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:44:05,839 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:44:05,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1228255327] [2022-11-03 03:44:05,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1228255327] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:44:05,839 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:44:05,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:44:05,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468059719] [2022-11-03 03:44:05,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:44:05,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:44:05,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:44:05,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:44:05,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:44:05,841 INFO L87 Difference]: Start difference. First operand 117 states and 162 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:05,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:44:05,928 INFO L93 Difference]: Finished difference Result 273 states and 373 transitions. [2022-11-03 03:44:05,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:44:05,928 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2022-11-03 03:44:05,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:44:05,929 INFO L225 Difference]: With dead ends: 273 [2022-11-03 03:44:05,929 INFO L226 Difference]: Without dead ends: 158 [2022-11-03 03:44:05,930 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 74 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 03:44:05,930 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 277 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:44:05,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [277 Valid, 216 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:44:05,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-11-03 03:44:05,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 117. [2022-11-03 03:44:05,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.3879310344827587) internal successors, (161), 116 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:05,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 161 transitions. [2022-11-03 03:44:05,935 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 161 transitions. Word has length 77 [2022-11-03 03:44:05,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:44:05,935 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 161 transitions. [2022-11-03 03:44:05,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:05,936 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 161 transitions. [2022-11-03 03:44:05,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-03 03:44:05,936 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:44:05,936 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:44:05,954 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-03 03:44:06,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:44:06,137 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:44:06,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:44:06,138 INFO L85 PathProgramCache]: Analyzing trace with hash 440034043, now seen corresponding path program 1 times [2022-11-03 03:44:06,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:44:06,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [941187637] [2022-11-03 03:44:06,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:44:06,138 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:44:06,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:44:06,139 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:44:06,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-03 03:44:06,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:44:06,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:44:06,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:44:06,401 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 03:44:06,401 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:44:06,401 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:44:06,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [941187637] [2022-11-03 03:44:06,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [941187637] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:44:06,402 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:44:06,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:44:06,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554536859] [2022-11-03 03:44:06,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:44:06,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:44:06,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:44:06,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:44:06,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:44:06,404 INFO L87 Difference]: Start difference. First operand 117 states and 161 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:06,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:44:06,484 INFO L93 Difference]: Finished difference Result 275 states and 373 transitions. [2022-11-03 03:44:06,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:44:06,484 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2022-11-03 03:44:06,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:44:06,487 INFO L225 Difference]: With dead ends: 275 [2022-11-03 03:44:06,487 INFO L226 Difference]: Without dead ends: 160 [2022-11-03 03:44:06,487 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 74 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 03:44:06,488 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 273 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:44:06,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [273 Valid, 217 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:44:06,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-11-03 03:44:06,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 117. [2022-11-03 03:44:06,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.3793103448275863) internal successors, (160), 116 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:06,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 160 transitions. [2022-11-03 03:44:06,494 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 160 transitions. Word has length 77 [2022-11-03 03:44:06,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:44:06,495 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 160 transitions. [2022-11-03 03:44:06,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:06,495 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 160 transitions. [2022-11-03 03:44:06,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-03 03:44:06,496 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:44:06,496 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:44:06,514 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-03 03:44:06,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:44:06,709 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:44:06,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:44:06,709 INFO L85 PathProgramCache]: Analyzing trace with hash 714793657, now seen corresponding path program 1 times [2022-11-03 03:44:06,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:44:06,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2055962827] [2022-11-03 03:44:06,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:44:06,710 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:44:06,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:44:06,711 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:44:06,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-03 03:44:06,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:44:06,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:44:06,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:44:06,988 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 03:44:06,988 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:44:06,988 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:44:06,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2055962827] [2022-11-03 03:44:06,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2055962827] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:44:06,988 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:44:06,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:44:06,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408483064] [2022-11-03 03:44:06,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:44:06,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:44:06,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:44:06,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:44:06,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:44:06,990 INFO L87 Difference]: Start difference. First operand 117 states and 160 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:07,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:44:07,065 INFO L93 Difference]: Finished difference Result 277 states and 373 transitions. [2022-11-03 03:44:07,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:44:07,066 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2022-11-03 03:44:07,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:44:07,067 INFO L225 Difference]: With dead ends: 277 [2022-11-03 03:44:07,067 INFO L226 Difference]: Without dead ends: 162 [2022-11-03 03:44:07,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 74 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 03:44:07,068 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 269 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:44:07,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [269 Valid, 218 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:44:07,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-11-03 03:44:07,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 117. [2022-11-03 03:44:07,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.3706896551724137) internal successors, (159), 116 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:07,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 159 transitions. [2022-11-03 03:44:07,073 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 159 transitions. Word has length 77 [2022-11-03 03:44:07,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:44:07,074 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 159 transitions. [2022-11-03 03:44:07,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:07,074 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 159 transitions. [2022-11-03 03:44:07,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-03 03:44:07,075 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:44:07,075 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:44:07,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-03 03:44:07,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:44:07,288 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:44:07,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:44:07,288 INFO L85 PathProgramCache]: Analyzing trace with hash 737425911, now seen corresponding path program 1 times [2022-11-03 03:44:07,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:44:07,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [675323741] [2022-11-03 03:44:07,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:44:07,289 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:44:07,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:44:07,290 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:44:07,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-03 03:44:07,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:44:07,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:44:07,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:44:07,578 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 03:44:07,578 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:44:07,578 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:44:07,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [675323741] [2022-11-03 03:44:07,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [675323741] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:44:07,579 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:44:07,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:44:07,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724753474] [2022-11-03 03:44:07,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:44:07,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:44:07,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:44:07,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:44:07,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:44:07,581 INFO L87 Difference]: Start difference. First operand 117 states and 159 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:07,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:44:07,658 INFO L93 Difference]: Finished difference Result 279 states and 373 transitions. [2022-11-03 03:44:07,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:44:07,659 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2022-11-03 03:44:07,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:44:07,660 INFO L225 Difference]: With dead ends: 279 [2022-11-03 03:44:07,660 INFO L226 Difference]: Without dead ends: 164 [2022-11-03 03:44:07,660 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 74 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 03:44:07,661 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 265 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:44:07,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [265 Valid, 230 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:44:07,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-11-03 03:44:07,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 117. [2022-11-03 03:44:07,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.3620689655172413) internal successors, (158), 116 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:07,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 158 transitions. [2022-11-03 03:44:07,666 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 158 transitions. Word has length 77 [2022-11-03 03:44:07,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:44:07,666 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 158 transitions. [2022-11-03 03:44:07,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:07,667 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 158 transitions. [2022-11-03 03:44:07,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-03 03:44:07,667 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:44:07,667 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:44:07,691 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-03 03:44:07,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:44:07,887 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:44:07,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:44:07,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1246899001, now seen corresponding path program 1 times [2022-11-03 03:44:07,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:44:07,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1225881985] [2022-11-03 03:44:07,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:44:07,888 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:44:07,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:44:07,889 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:44:07,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-03 03:44:08,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:44:08,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:44:08,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:44:08,146 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 03:44:08,147 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:44:08,147 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:44:08,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1225881985] [2022-11-03 03:44:08,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1225881985] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:44:08,147 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:44:08,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:44:08,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677755826] [2022-11-03 03:44:08,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:44:08,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:44:08,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:44:08,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:44:08,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:44:08,149 INFO L87 Difference]: Start difference. First operand 117 states and 158 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:08,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:44:08,244 INFO L93 Difference]: Finished difference Result 285 states and 379 transitions. [2022-11-03 03:44:08,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:44:08,245 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2022-11-03 03:44:08,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:44:08,246 INFO L225 Difference]: With dead ends: 285 [2022-11-03 03:44:08,246 INFO L226 Difference]: Without dead ends: 170 [2022-11-03 03:44:08,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 74 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 03:44:08,247 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 257 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:44:08,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 234 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:44:08,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-11-03 03:44:08,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 117. [2022-11-03 03:44:08,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.353448275862069) internal successors, (157), 116 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:08,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 157 transitions. [2022-11-03 03:44:08,252 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 157 transitions. Word has length 77 [2022-11-03 03:44:08,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:44:08,252 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 157 transitions. [2022-11-03 03:44:08,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:08,253 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 157 transitions. [2022-11-03 03:44:08,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-03 03:44:08,253 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:44:08,254 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:44:08,270 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-03 03:44:08,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:44:08,469 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:44:08,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:44:08,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1465753719, now seen corresponding path program 1 times [2022-11-03 03:44:08,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:44:08,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [400929074] [2022-11-03 03:44:08,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:44:08,470 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:44:08,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:44:08,471 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:44:08,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-03 03:44:08,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:44:08,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:44:08,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:44:08,750 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 03:44:08,750 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:44:08,750 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:44:08,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [400929074] [2022-11-03 03:44:08,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [400929074] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:44:08,751 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:44:08,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:44:08,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799036055] [2022-11-03 03:44:08,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:44:08,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:44:08,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:44:08,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:44:08,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:44:08,752 INFO L87 Difference]: Start difference. First operand 117 states and 157 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:08,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:44:08,829 INFO L93 Difference]: Finished difference Result 295 states and 391 transitions. [2022-11-03 03:44:08,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:44:08,830 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2022-11-03 03:44:08,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:44:08,831 INFO L225 Difference]: With dead ends: 295 [2022-11-03 03:44:08,831 INFO L226 Difference]: Without dead ends: 180 [2022-11-03 03:44:08,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 74 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 03:44:08,832 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 245 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:44:08,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [245 Valid, 257 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:44:08,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-11-03 03:44:08,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 117. [2022-11-03 03:44:08,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.3448275862068966) internal successors, (156), 116 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:08,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 156 transitions. [2022-11-03 03:44:08,837 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 156 transitions. Word has length 77 [2022-11-03 03:44:08,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:44:08,837 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 156 transitions. [2022-11-03 03:44:08,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:08,838 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 156 transitions. [2022-11-03 03:44:08,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-03 03:44:08,839 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:44:08,839 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:44:08,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-03 03:44:09,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:44:09,060 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:44:09,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:44:09,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1723919157, now seen corresponding path program 1 times [2022-11-03 03:44:09,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:44:09,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1018454935] [2022-11-03 03:44:09,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:44:09,061 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:44:09,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:44:09,063 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:44:09,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-03 03:44:09,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:44:09,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 93 conjunts are in the unsatisfiable core [2022-11-03 03:44:09,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:44:12,144 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 03:44:12,144 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:44:12,144 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:44:12,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1018454935] [2022-11-03 03:44:12,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1018454935] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:44:12,145 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:44:12,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-11-03 03:44:12,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687500994] [2022-11-03 03:44:12,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:44:12,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-03 03:44:12,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:44:12,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-03 03:44:12,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1323, Unknown=0, NotChecked=0, Total=1406 [2022-11-03 03:44:12,147 INFO L87 Difference]: Start difference. First operand 117 states and 156 transitions. Second operand has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:13,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:44:13,510 INFO L93 Difference]: Finished difference Result 463 states and 621 transitions. [2022-11-03 03:44:13,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-03 03:44:13,511 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2022-11-03 03:44:13,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:44:13,514 INFO L225 Difference]: With dead ends: 463 [2022-11-03 03:44:13,514 INFO L226 Difference]: Without dead ends: 461 [2022-11-03 03:44:13,515 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=205, Invalid=2551, Unknown=0, NotChecked=0, Total=2756 [2022-11-03 03:44:13,516 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 1429 mSDsluCounter, 4285 mSDsCounter, 0 mSdLazyCounter, 542 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1429 SdHoareTripleChecker+Valid, 4420 SdHoareTripleChecker+Invalid, 1720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1156 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:44:13,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1429 Valid, 4420 Invalid, 1720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 542 Invalid, 0 Unknown, 1156 Unchecked, 0.6s Time] [2022-11-03 03:44:13,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2022-11-03 03:44:13,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 191. [2022-11-03 03:44:13,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.3157894736842106) internal successors, (250), 190 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:13,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 250 transitions. [2022-11-03 03:44:13,527 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 250 transitions. Word has length 77 [2022-11-03 03:44:13,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:44:13,527 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 250 transitions. [2022-11-03 03:44:13,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:13,528 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 250 transitions. [2022-11-03 03:44:13,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-03 03:44:13,529 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:44:13,529 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:44:13,546 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-03 03:44:13,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:44:13,742 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:44:13,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:44:13,742 INFO L85 PathProgramCache]: Analyzing trace with hash 1330892147, now seen corresponding path program 1 times [2022-11-03 03:44:13,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:44:13,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1539000238] [2022-11-03 03:44:13,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:44:13,743 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:44:13,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:44:13,744 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:44:13,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-03 03:44:13,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:44:13,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:44:13,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:44:14,029 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 03:44:14,029 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:44:14,029 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:44:14,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1539000238] [2022-11-03 03:44:14,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1539000238] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:44:14,030 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:44:14,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:44:14,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394329186] [2022-11-03 03:44:14,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:44:14,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:44:14,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:44:14,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:44:14,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:44:14,034 INFO L87 Difference]: Start difference. First operand 191 states and 250 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:14,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:44:14,120 INFO L93 Difference]: Finished difference Result 361 states and 473 transitions. [2022-11-03 03:44:14,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:44:14,121 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2022-11-03 03:44:14,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:44:14,122 INFO L225 Difference]: With dead ends: 361 [2022-11-03 03:44:14,122 INFO L226 Difference]: Without dead ends: 246 [2022-11-03 03:44:14,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 74 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 03:44:14,123 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 241 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:44:14,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 263 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:44:14,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2022-11-03 03:44:14,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 191. [2022-11-03 03:44:14,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.305263157894737) internal successors, (248), 190 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:14,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 248 transitions. [2022-11-03 03:44:14,131 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 248 transitions. Word has length 77 [2022-11-03 03:44:14,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:44:14,132 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 248 transitions. [2022-11-03 03:44:14,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:14,132 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 248 transitions. [2022-11-03 03:44:14,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-03 03:44:14,133 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:44:14,133 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:44:14,146 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-03 03:44:14,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:44:14,346 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:44:14,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:44:14,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1559930889, now seen corresponding path program 1 times [2022-11-03 03:44:14,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:44:14,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [355806559] [2022-11-03 03:44:14,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:44:14,347 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:44:14,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:44:14,348 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:44:14,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-03 03:44:14,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:44:14,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:44:14,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:44:14,646 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 03:44:14,646 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:44:14,647 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:44:14,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [355806559] [2022-11-03 03:44:14,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [355806559] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:44:14,647 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:44:14,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:44:14,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207881646] [2022-11-03 03:44:14,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:44:14,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:44:14,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:44:14,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:44:14,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:44:14,648 INFO L87 Difference]: Start difference. First operand 191 states and 248 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:14,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:44:14,728 INFO L93 Difference]: Finished difference Result 357 states and 465 transitions. [2022-11-03 03:44:14,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:44:14,728 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2022-11-03 03:44:14,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:44:14,729 INFO L225 Difference]: With dead ends: 357 [2022-11-03 03:44:14,729 INFO L226 Difference]: Without dead ends: 242 [2022-11-03 03:44:14,730 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 74 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 03:44:14,730 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 243 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:44:14,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 251 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:44:14,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-11-03 03:44:14,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 191. [2022-11-03 03:44:14,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.2947368421052632) internal successors, (246), 190 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:14,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 246 transitions. [2022-11-03 03:44:14,740 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 246 transitions. Word has length 77 [2022-11-03 03:44:14,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:44:14,740 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 246 transitions. [2022-11-03 03:44:14,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:14,741 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 246 transitions. [2022-11-03 03:44:14,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-03 03:44:14,742 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:44:14,742 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:44:14,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-03 03:44:14,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:44:14,953 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:44:14,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:44:14,954 INFO L85 PathProgramCache]: Analyzing trace with hash 702850803, now seen corresponding path program 1 times [2022-11-03 03:44:14,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:44:14,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1298028360] [2022-11-03 03:44:14,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:44:14,954 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:44:14,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:44:14,955 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:44:14,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-03 03:44:15,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:44:15,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:44:15,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:44:15,231 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 03:44:15,231 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:44:15,231 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:44:15,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1298028360] [2022-11-03 03:44:15,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1298028360] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:44:15,232 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:44:15,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:44:15,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619106073] [2022-11-03 03:44:15,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:44:15,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:44:15,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:44:15,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:44:15,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:44:15,234 INFO L87 Difference]: Start difference. First operand 191 states and 246 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:15,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:44:15,332 INFO L93 Difference]: Finished difference Result 355 states and 459 transitions. [2022-11-03 03:44:15,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:44:15,332 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2022-11-03 03:44:15,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:44:15,333 INFO L225 Difference]: With dead ends: 355 [2022-11-03 03:44:15,333 INFO L226 Difference]: Without dead ends: 240 [2022-11-03 03:44:15,334 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 74 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 03:44:15,335 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 243 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:44:15,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 247 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:44:15,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-11-03 03:44:15,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 191. [2022-11-03 03:44:15,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.2842105263157895) internal successors, (244), 190 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:15,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 244 transitions. [2022-11-03 03:44:15,354 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 244 transitions. Word has length 77 [2022-11-03 03:44:15,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:44:15,354 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 244 transitions. [2022-11-03 03:44:15,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:15,355 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 244 transitions. [2022-11-03 03:44:15,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-03 03:44:15,355 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:44:15,356 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:44:15,370 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-03 03:44:15,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:44:15,571 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:44:15,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:44:15,571 INFO L85 PathProgramCache]: Analyzing trace with hash 906270707, now seen corresponding path program 1 times [2022-11-03 03:44:15,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:44:15,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2073305898] [2022-11-03 03:44:15,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:44:15,572 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:44:15,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:44:15,573 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:44:15,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-03 03:44:15,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:44:15,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:44:15,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:44:15,852 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 03:44:15,852 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:44:15,853 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:44:15,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2073305898] [2022-11-03 03:44:15,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2073305898] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:44:15,853 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:44:15,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:44:15,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969828109] [2022-11-03 03:44:15,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:44:15,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:44:15,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:44:15,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:44:15,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:44:15,855 INFO L87 Difference]: Start difference. First operand 191 states and 244 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:15,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:44:15,937 INFO L93 Difference]: Finished difference Result 351 states and 450 transitions. [2022-11-03 03:44:15,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:44:15,938 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2022-11-03 03:44:15,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:44:15,939 INFO L225 Difference]: With dead ends: 351 [2022-11-03 03:44:15,939 INFO L226 Difference]: Without dead ends: 236 [2022-11-03 03:44:15,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 74 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 03:44:15,940 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 245 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:44:15,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [245 Valid, 238 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:44:15,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-11-03 03:44:15,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 191. [2022-11-03 03:44:15,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.2736842105263158) internal successors, (242), 190 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:15,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 242 transitions. [2022-11-03 03:44:15,949 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 242 transitions. Word has length 77 [2022-11-03 03:44:15,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:44:15,950 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 242 transitions. [2022-11-03 03:44:15,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:15,950 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 242 transitions. [2022-11-03 03:44:15,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-03 03:44:15,951 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:44:15,951 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:44:15,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-03 03:44:16,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:44:16,163 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:44:16,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:44:16,163 INFO L85 PathProgramCache]: Analyzing trace with hash 1329552371, now seen corresponding path program 1 times [2022-11-03 03:44:16,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:44:16,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1576151994] [2022-11-03 03:44:16,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:44:16,164 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:44:16,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:44:16,165 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:44:16,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-03 03:44:16,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:44:16,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:44:16,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:44:16,399 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 03:44:16,400 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:44:16,400 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:44:16,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1576151994] [2022-11-03 03:44:16,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1576151994] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:44:16,400 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:44:16,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:44:16,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804360832] [2022-11-03 03:44:16,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:44:16,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:44:16,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:44:16,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:44:16,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:44:16,402 INFO L87 Difference]: Start difference. First operand 191 states and 242 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:16,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:44:16,478 INFO L93 Difference]: Finished difference Result 335 states and 428 transitions. [2022-11-03 03:44:16,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:44:16,478 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2022-11-03 03:44:16,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:44:16,479 INFO L225 Difference]: With dead ends: 335 [2022-11-03 03:44:16,480 INFO L226 Difference]: Without dead ends: 220 [2022-11-03 03:44:16,480 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 74 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 03:44:16,480 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 259 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:44:16,481 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [259 Valid, 207 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:44:16,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-11-03 03:44:16,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 191. [2022-11-03 03:44:16,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.263157894736842) internal successors, (240), 190 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:16,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 240 transitions. [2022-11-03 03:44:16,488 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 240 transitions. Word has length 77 [2022-11-03 03:44:16,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:44:16,488 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 240 transitions. [2022-11-03 03:44:16,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:16,488 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 240 transitions. [2022-11-03 03:44:16,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-03 03:44:16,489 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:44:16,489 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:44:16,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-03 03:44:16,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:44:16,702 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:44:16,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:44:16,702 INFO L85 PathProgramCache]: Analyzing trace with hash 352111859, now seen corresponding path program 1 times [2022-11-03 03:44:16,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:44:16,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [866215123] [2022-11-03 03:44:16,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:44:16,703 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:44:16,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:44:16,704 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:44:16,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-03 03:44:16,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:44:16,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:44:16,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:44:16,912 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 03:44:16,913 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:44:16,913 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:44:16,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [866215123] [2022-11-03 03:44:16,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [866215123] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:44:16,913 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:44:16,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:44:16,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575166193] [2022-11-03 03:44:16,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:44:16,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:44:16,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:44:16,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:44:16,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:44:16,915 INFO L87 Difference]: Start difference. First operand 191 states and 240 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:16,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:44:16,987 INFO L93 Difference]: Finished difference Result 331 states and 419 transitions. [2022-11-03 03:44:16,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:44:16,988 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2022-11-03 03:44:16,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:44:16,989 INFO L225 Difference]: With dead ends: 331 [2022-11-03 03:44:16,989 INFO L226 Difference]: Without dead ends: 216 [2022-11-03 03:44:16,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 74 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 03:44:16,990 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 261 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:44:16,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [261 Valid, 198 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:44:16,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-11-03 03:44:16,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 191. [2022-11-03 03:44:16,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.2526315789473683) internal successors, (238), 190 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:17,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 238 transitions. [2022-11-03 03:44:17,003 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 238 transitions. Word has length 77 [2022-11-03 03:44:17,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:44:17,003 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 238 transitions. [2022-11-03 03:44:17,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:17,004 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 238 transitions. [2022-11-03 03:44:17,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-03 03:44:17,004 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:44:17,004 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:44:17,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-03 03:44:17,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:44:17,217 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:44:17,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:44:17,217 INFO L85 PathProgramCache]: Analyzing trace with hash -325468685, now seen corresponding path program 1 times [2022-11-03 03:44:17,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:44:17,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [309465192] [2022-11-03 03:44:17,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:44:17,218 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:44:17,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:44:17,219 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:44:17,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-03 03:44:17,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:44:17,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:44:17,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:44:17,460 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 03:44:17,461 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:44:17,461 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:44:17,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [309465192] [2022-11-03 03:44:17,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [309465192] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:44:17,461 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:44:17,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:44:17,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996212940] [2022-11-03 03:44:17,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:44:17,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:44:17,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:44:17,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:44:17,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:44:17,463 INFO L87 Difference]: Start difference. First operand 191 states and 238 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:17,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:44:17,531 INFO L93 Difference]: Finished difference Result 327 states and 410 transitions. [2022-11-03 03:44:17,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:44:17,532 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2022-11-03 03:44:17,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:44:17,533 INFO L225 Difference]: With dead ends: 327 [2022-11-03 03:44:17,533 INFO L226 Difference]: Without dead ends: 212 [2022-11-03 03:44:17,533 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 74 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 03:44:17,534 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 263 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:44:17,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [263 Valid, 189 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:44:17,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-11-03 03:44:17,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 191. [2022-11-03 03:44:17,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.2421052631578948) internal successors, (236), 190 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:17,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 236 transitions. [2022-11-03 03:44:17,542 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 236 transitions. Word has length 77 [2022-11-03 03:44:17,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:44:17,543 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 236 transitions. [2022-11-03 03:44:17,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:17,543 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 236 transitions. [2022-11-03 03:44:17,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-03 03:44:17,544 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:44:17,544 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:44:17,562 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-11-03 03:44:17,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:44:17,756 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:44:17,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:44:17,757 INFO L85 PathProgramCache]: Analyzing trace with hash 1522095223, now seen corresponding path program 1 times [2022-11-03 03:44:17,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:44:17,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1128213447] [2022-11-03 03:44:17,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:44:17,757 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:44:17,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:44:17,758 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:44:17,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-03 03:44:17,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:44:17,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:44:17,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:44:17,951 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 03:44:17,952 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:44:17,952 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:44:17,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1128213447] [2022-11-03 03:44:17,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1128213447] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:44:17,952 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:44:17,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:44:17,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002114874] [2022-11-03 03:44:17,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:44:17,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:44:17,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:44:17,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:44:17,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:44:17,954 INFO L87 Difference]: Start difference. First operand 191 states and 236 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:18,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:44:18,018 INFO L93 Difference]: Finished difference Result 311 states and 388 transitions. [2022-11-03 03:44:18,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:44:18,018 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2022-11-03 03:44:18,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:44:18,019 INFO L225 Difference]: With dead ends: 311 [2022-11-03 03:44:18,019 INFO L226 Difference]: Without dead ends: 196 [2022-11-03 03:44:18,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 74 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 03:44:18,020 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 277 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:44:18,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [277 Valid, 149 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:44:18,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-11-03 03:44:18,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 191. [2022-11-03 03:44:18,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.231578947368421) internal successors, (234), 190 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:18,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 234 transitions. [2022-11-03 03:44:18,030 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 234 transitions. Word has length 77 [2022-11-03 03:44:18,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:44:18,031 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 234 transitions. [2022-11-03 03:44:18,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:18,031 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 234 transitions. [2022-11-03 03:44:18,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-03 03:44:18,032 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:44:18,032 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:44:18,049 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-11-03 03:44:18,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:44:18,244 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:44:18,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:44:18,244 INFO L85 PathProgramCache]: Analyzing trace with hash 991951731, now seen corresponding path program 1 times [2022-11-03 03:44:18,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:44:18,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1848866100] [2022-11-03 03:44:18,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:44:18,245 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:44:18,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:44:18,246 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:44:18,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-03 03:44:18,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:44:18,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:44:18,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:44:18,428 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 03:44:18,428 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:44:18,428 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:44:18,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1848866100] [2022-11-03 03:44:18,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1848866100] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:44:18,429 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:44:18,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:44:18,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6487855] [2022-11-03 03:44:18,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:44:18,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:44:18,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:44:18,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:44:18,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:44:18,433 INFO L87 Difference]: Start difference. First operand 191 states and 234 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:18,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:44:18,497 INFO L93 Difference]: Finished difference Result 306 states and 380 transitions. [2022-11-03 03:44:18,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:44:18,498 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2022-11-03 03:44:18,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:44:18,499 INFO L225 Difference]: With dead ends: 306 [2022-11-03 03:44:18,499 INFO L226 Difference]: Without dead ends: 191 [2022-11-03 03:44:18,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 74 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 03:44:18,502 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 281 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:44:18,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [281 Valid, 139 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:44:18,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-11-03 03:44:18,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2022-11-03 03:44:18,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.2210526315789474) internal successors, (232), 190 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:18,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 232 transitions. [2022-11-03 03:44:18,519 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 232 transitions. Word has length 77 [2022-11-03 03:44:18,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:44:18,519 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 232 transitions. [2022-11-03 03:44:18,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:18,520 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 232 transitions. [2022-11-03 03:44:18,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-11-03 03:44:18,521 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:44:18,521 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-03 03:44:18,533 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2022-11-03 03:44:18,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:44:18,733 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:44:18,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:44:18,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1173244773, now seen corresponding path program 1 times [2022-11-03 03:44:18,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:44:18,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [493944089] [2022-11-03 03:44:18,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:44:18,735 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:44:18,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:44:18,735 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:44:18,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-03 03:44:19,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:44:19,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 782 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 03:44:19,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:44:19,412 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:44:19,412 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:44:19,413 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:44:19,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [493944089] [2022-11-03 03:44:19,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [493944089] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:44:19,413 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:44:19,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 03:44:19,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190395386] [2022-11-03 03:44:19,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:44:19,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 03:44:19,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:44:19,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 03:44:19,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 03:44:19,415 INFO L87 Difference]: Start difference. First operand 191 states and 232 transitions. Second operand has 9 states, 9 states have (on average 21.11111111111111) internal successors, (190), 9 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:19,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:44:19,936 INFO L93 Difference]: Finished difference Result 876 states and 1092 transitions. [2022-11-03 03:44:19,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-03 03:44:19,937 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 21.11111111111111) internal successors, (190), 9 states have internal predecessors, (190), 0 states have call successors, (0), 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 190 [2022-11-03 03:44:19,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:44:19,940 INFO L225 Difference]: With dead ends: 876 [2022-11-03 03:44:19,940 INFO L226 Difference]: Without dead ends: 761 [2022-11-03 03:44:19,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2022-11-03 03:44:19,942 INFO L413 NwaCegarLoop]: 212 mSDtfsCounter, 1552 mSDsluCounter, 1694 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1552 SdHoareTripleChecker+Valid, 1906 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:44:19,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1552 Valid, 1906 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 03:44:19,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 761 states. [2022-11-03 03:44:19,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 761 to 199. [2022-11-03 03:44:19,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 1.2272727272727273) internal successors, (243), 198 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:19,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 243 transitions. [2022-11-03 03:44:19,953 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 243 transitions. Word has length 190 [2022-11-03 03:44:19,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:44:19,954 INFO L495 AbstractCegarLoop]: Abstraction has 199 states and 243 transitions. [2022-11-03 03:44:19,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 21.11111111111111) internal successors, (190), 9 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:19,954 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 243 transitions. [2022-11-03 03:44:19,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-11-03 03:44:19,955 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:44:19,955 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-03 03:44:19,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-11-03 03:44:20,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:44:20,163 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:44:20,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:44:20,164 INFO L85 PathProgramCache]: Analyzing trace with hash 979862045, now seen corresponding path program 1 times [2022-11-03 03:44:20,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:44:20,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [493258197] [2022-11-03 03:44:20,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:44:20,164 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:44:20,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:44:20,165 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:44:20,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-03 03:44:20,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:44:20,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 782 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 03:44:20,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:44:20,808 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:44:20,809 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:44:20,809 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:44:20,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [493258197] [2022-11-03 03:44:20,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [493258197] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:44:20,809 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:44:20,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 03:44:20,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802781989] [2022-11-03 03:44:20,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:44:20,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 03:44:20,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:44:20,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 03:44:20,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 03:44:20,811 INFO L87 Difference]: Start difference. First operand 199 states and 243 transitions. Second operand has 10 states, 10 states have (on average 19.0) internal successors, (190), 10 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:21,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:44:21,491 INFO L93 Difference]: Finished difference Result 982 states and 1222 transitions. [2022-11-03 03:44:21,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-03 03:44:21,492 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 19.0) internal successors, (190), 10 states have internal predecessors, (190), 0 states have call successors, (0), 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 190 [2022-11-03 03:44:21,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:44:21,495 INFO L225 Difference]: With dead ends: 982 [2022-11-03 03:44:21,495 INFO L226 Difference]: Without dead ends: 867 [2022-11-03 03:44:21,498 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=189, Invalid=623, Unknown=0, NotChecked=0, Total=812 [2022-11-03 03:44:21,498 INFO L413 NwaCegarLoop]: 217 mSDtfsCounter, 1808 mSDsluCounter, 2031 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1808 SdHoareTripleChecker+Valid, 2248 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:44:21,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1808 Valid, 2248 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 03:44:21,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 867 states. [2022-11-03 03:44:21,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 867 to 203. [2022-11-03 03:44:21,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 1.2277227722772277) internal successors, (248), 202 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:21,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 248 transitions. [2022-11-03 03:44:21,510 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 248 transitions. Word has length 190 [2022-11-03 03:44:21,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:44:21,510 INFO L495 AbstractCegarLoop]: Abstraction has 203 states and 248 transitions. [2022-11-03 03:44:21,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 19.0) internal successors, (190), 10 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:21,511 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 248 transitions. [2022-11-03 03:44:21,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-11-03 03:44:21,512 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:44:21,512 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-03 03:44:21,534 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-11-03 03:44:21,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:44:21,727 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:44:21,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:44:21,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1053532001, now seen corresponding path program 1 times [2022-11-03 03:44:21,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:44:21,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1738828187] [2022-11-03 03:44:21,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:44:21,728 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:44:21,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:44:21,729 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:44:21,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-11-03 03:44:21,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:44:21,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 782 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 03:44:21,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:44:22,344 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:44:22,344 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:44:22,344 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:44:22,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1738828187] [2022-11-03 03:44:22,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1738828187] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:44:22,344 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:44:22,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 03:44:22,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566050553] [2022-11-03 03:44:22,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:44:22,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:44:22,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:44:22,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:44:22,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:44:22,346 INFO L87 Difference]: Start difference. First operand 203 states and 248 transitions. Second operand has 7 states, 7 states have (on average 27.142857142857142) internal successors, (190), 7 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:22,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:44:22,743 INFO L93 Difference]: Finished difference Result 569 states and 711 transitions. [2022-11-03 03:44:22,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 03:44:22,744 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 27.142857142857142) internal successors, (190), 7 states have internal predecessors, (190), 0 states have call successors, (0), 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 190 [2022-11-03 03:44:22,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:44:22,745 INFO L225 Difference]: With dead ends: 569 [2022-11-03 03:44:22,746 INFO L226 Difference]: Without dead ends: 454 [2022-11-03 03:44:22,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-11-03 03:44:22,747 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 805 mSDsluCounter, 767 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 805 SdHoareTripleChecker+Valid, 970 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:44:22,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [805 Valid, 970 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 03:44:22,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2022-11-03 03:44:22,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 217. [2022-11-03 03:44:22,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 1.2361111111111112) internal successors, (267), 216 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:22,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 267 transitions. [2022-11-03 03:44:22,756 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 267 transitions. Word has length 190 [2022-11-03 03:44:22,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:44:22,756 INFO L495 AbstractCegarLoop]: Abstraction has 217 states and 267 transitions. [2022-11-03 03:44:22,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 27.142857142857142) internal successors, (190), 7 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:22,756 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 267 transitions. [2022-11-03 03:44:22,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-11-03 03:44:22,757 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:44:22,758 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-03 03:44:22,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-11-03 03:44:22,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:44:22,972 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:44:22,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:44:22,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1937040991, now seen corresponding path program 1 times [2022-11-03 03:44:22,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:44:22,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [955568008] [2022-11-03 03:44:22,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:44:22,973 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:44:22,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:44:22,974 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:44:22,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-11-03 03:44:23,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:44:23,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 782 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-03 03:44:23,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:44:24,056 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:44:24,056 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:44:24,056 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:44:24,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [955568008] [2022-11-03 03:44:24,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [955568008] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:44:24,057 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:44:24,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 03:44:24,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287289817] [2022-11-03 03:44:24,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:44:24,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 03:44:24,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:44:24,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 03:44:24,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:44:24,059 INFO L87 Difference]: Start difference. First operand 217 states and 267 transitions. Second operand has 8 states, 8 states have (on average 23.75) internal successors, (190), 8 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:24,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:44:24,409 INFO L93 Difference]: Finished difference Result 615 states and 777 transitions. [2022-11-03 03:44:24,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 03:44:24,409 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 23.75) internal successors, (190), 8 states have internal predecessors, (190), 0 states have call successors, (0), 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 190 [2022-11-03 03:44:24,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:44:24,414 INFO L225 Difference]: With dead ends: 615 [2022-11-03 03:44:24,414 INFO L226 Difference]: Without dead ends: 488 [2022-11-03 03:44:24,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-03 03:44:24,415 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 429 mSDsluCounter, 966 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 429 SdHoareTripleChecker+Valid, 1156 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 323 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:44:24,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [429 Valid, 1156 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 247 Invalid, 0 Unknown, 323 Unchecked, 0.3s Time] [2022-11-03 03:44:24,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2022-11-03 03:44:24,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 251. [2022-11-03 03:44:24,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 250 states have (on average 1.264) internal successors, (316), 250 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:24,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 316 transitions. [2022-11-03 03:44:24,425 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 316 transitions. Word has length 190 [2022-11-03 03:44:24,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:44:24,425 INFO L495 AbstractCegarLoop]: Abstraction has 251 states and 316 transitions. [2022-11-03 03:44:24,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 23.75) internal successors, (190), 8 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:24,426 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 316 transitions. [2022-11-03 03:44:24,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-11-03 03:44:24,427 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:44:24,427 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-03 03:44:24,450 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-11-03 03:44:24,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:44:24,642 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:44:24,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:44:24,642 INFO L85 PathProgramCache]: Analyzing trace with hash 417344291, now seen corresponding path program 1 times [2022-11-03 03:44:24,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:44:24,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [452001342] [2022-11-03 03:44:24,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:44:24,643 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:44:24,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:44:24,644 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:44:24,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-11-03 03:44:24,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:44:24,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 782 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 03:44:24,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:44:25,334 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:44:25,334 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:44:25,334 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:44:25,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [452001342] [2022-11-03 03:44:25,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [452001342] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:44:25,335 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:44:25,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 03:44:25,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897452228] [2022-11-03 03:44:25,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:44:25,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 03:44:25,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:44:25,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 03:44:25,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:44:25,336 INFO L87 Difference]: Start difference. First operand 251 states and 316 transitions. Second operand has 8 states, 8 states have (on average 23.75) internal successors, (190), 8 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:25,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:44:25,824 INFO L93 Difference]: Finished difference Result 638 states and 808 transitions. [2022-11-03 03:44:25,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 03:44:25,825 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 23.75) internal successors, (190), 8 states have internal predecessors, (190), 0 states have call successors, (0), 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 190 [2022-11-03 03:44:25,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:44:25,826 INFO L225 Difference]: With dead ends: 638 [2022-11-03 03:44:25,826 INFO L226 Difference]: Without dead ends: 511 [2022-11-03 03:44:25,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2022-11-03 03:44:25,827 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 988 mSDsluCounter, 1075 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 988 SdHoareTripleChecker+Valid, 1283 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:44:25,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [988 Valid, 1283 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 374 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 03:44:25,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2022-11-03 03:44:25,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 257. [2022-11-03 03:44:25,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 1.26171875) internal successors, (323), 256 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:25,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 323 transitions. [2022-11-03 03:44:25,837 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 323 transitions. Word has length 190 [2022-11-03 03:44:25,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:44:25,838 INFO L495 AbstractCegarLoop]: Abstraction has 257 states and 323 transitions. [2022-11-03 03:44:25,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 23.75) internal successors, (190), 8 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:25,838 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 323 transitions. [2022-11-03 03:44:25,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-11-03 03:44:25,839 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:44:25,839 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-03 03:44:25,862 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-11-03 03:44:26,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:44:26,058 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:44:26,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:44:26,059 INFO L85 PathProgramCache]: Analyzing trace with hash -353389275, now seen corresponding path program 1 times [2022-11-03 03:44:26,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:44:26,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [644583560] [2022-11-03 03:44:26,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:44:26,059 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:44:26,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:44:26,060 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:44:26,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-11-03 03:44:26,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:44:26,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 782 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 03:44:26,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:44:26,755 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:44:26,755 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:44:26,756 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:44:26,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [644583560] [2022-11-03 03:44:26,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [644583560] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:44:26,756 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:44:26,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 03:44:26,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605386491] [2022-11-03 03:44:26,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:44:26,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 03:44:26,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:44:26,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 03:44:26,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:44:26,758 INFO L87 Difference]: Start difference. First operand 257 states and 323 transitions. Second operand has 8 states, 8 states have (on average 23.75) internal successors, (190), 8 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:27,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:44:27,229 INFO L93 Difference]: Finished difference Result 654 states and 828 transitions. [2022-11-03 03:44:27,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 03:44:27,230 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 23.75) internal successors, (190), 8 states have internal predecessors, (190), 0 states have call successors, (0), 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 190 [2022-11-03 03:44:27,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:44:27,233 INFO L225 Difference]: With dead ends: 654 [2022-11-03 03:44:27,233 INFO L226 Difference]: Without dead ends: 523 [2022-11-03 03:44:27,233 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2022-11-03 03:44:27,234 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 996 mSDsluCounter, 1080 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 996 SdHoareTripleChecker+Valid, 1293 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:44:27,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [996 Valid, 1293 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 03:44:27,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2022-11-03 03:44:27,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 261. [2022-11-03 03:44:27,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 1.2615384615384615) internal successors, (328), 260 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:27,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 328 transitions. [2022-11-03 03:44:27,245 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 328 transitions. Word has length 190 [2022-11-03 03:44:27,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:44:27,245 INFO L495 AbstractCegarLoop]: Abstraction has 261 states and 328 transitions. [2022-11-03 03:44:27,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 23.75) internal successors, (190), 8 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:27,246 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 328 transitions. [2022-11-03 03:44:27,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-11-03 03:44:27,247 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:44:27,247 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-03 03:44:27,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-11-03 03:44:27,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:44:27,462 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:44:27,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:44:27,462 INFO L85 PathProgramCache]: Analyzing trace with hash 1523093543, now seen corresponding path program 1 times [2022-11-03 03:44:27,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:44:27,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1488482033] [2022-11-03 03:44:27,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:44:27,463 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:44:27,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:44:27,464 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:44:27,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-11-03 03:44:27,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:44:27,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 782 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-03 03:44:27,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:44:28,529 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:44:28,529 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:44:28,529 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:44:28,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1488482033] [2022-11-03 03:44:28,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1488482033] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:44:28,530 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:44:28,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 03:44:28,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951715303] [2022-11-03 03:44:28,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:44:28,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 03:44:28,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:44:28,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 03:44:28,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 03:44:28,531 INFO L87 Difference]: Start difference. First operand 261 states and 328 transitions. Second operand has 9 states, 9 states have (on average 21.11111111111111) internal successors, (190), 9 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:28,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:44:28,970 INFO L93 Difference]: Finished difference Result 663 states and 838 transitions. [2022-11-03 03:44:28,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 03:44:28,971 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 21.11111111111111) internal successors, (190), 9 states have internal predecessors, (190), 0 states have call successors, (0), 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 190 [2022-11-03 03:44:28,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:44:28,973 INFO L225 Difference]: With dead ends: 663 [2022-11-03 03:44:28,973 INFO L226 Difference]: Without dead ends: 528 [2022-11-03 03:44:28,973 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-11-03 03:44:28,974 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 561 mSDsluCounter, 1232 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 561 SdHoareTripleChecker+Valid, 1432 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 242 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:44:28,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [561 Valid, 1432 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 312 Invalid, 0 Unknown, 242 Unchecked, 0.3s Time] [2022-11-03 03:44:28,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2022-11-03 03:44:28,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 275. [2022-11-03 03:44:28,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 1.2627737226277371) internal successors, (346), 274 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:28,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 346 transitions. [2022-11-03 03:44:28,984 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 346 transitions. Word has length 190 [2022-11-03 03:44:28,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:44:28,985 INFO L495 AbstractCegarLoop]: Abstraction has 275 states and 346 transitions. [2022-11-03 03:44:28,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 21.11111111111111) internal successors, (190), 9 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:28,985 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 346 transitions. [2022-11-03 03:44:28,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-11-03 03:44:28,986 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:44:28,986 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-03 03:44:29,000 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (34)] Ended with exit code 0 [2022-11-03 03:44:29,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:44:29,200 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:44:29,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:44:29,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1447017559, now seen corresponding path program 1 times [2022-11-03 03:44:29,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:44:29,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1050946897] [2022-11-03 03:44:29,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:44:29,202 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:44:29,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:44:29,203 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:44:29,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-11-03 03:44:29,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:44:29,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 782 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 03:44:29,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:44:29,883 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:44:29,883 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:44:29,883 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:44:29,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1050946897] [2022-11-03 03:44:29,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1050946897] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:44:29,884 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:44:29,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 03:44:29,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881610686] [2022-11-03 03:44:29,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:44:29,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 03:44:29,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:44:29,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 03:44:29,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:44:29,885 INFO L87 Difference]: Start difference. First operand 275 states and 346 transitions. Second operand has 8 states, 8 states have (on average 23.75) internal successors, (190), 8 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:30,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:44:30,349 INFO L93 Difference]: Finished difference Result 686 states and 868 transitions. [2022-11-03 03:44:30,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 03:44:30,349 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 23.75) internal successors, (190), 8 states have internal predecessors, (190), 0 states have call successors, (0), 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 190 [2022-11-03 03:44:30,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:44:30,351 INFO L225 Difference]: With dead ends: 686 [2022-11-03 03:44:30,351 INFO L226 Difference]: Without dead ends: 551 [2022-11-03 03:44:30,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2022-11-03 03:44:30,351 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 1004 mSDsluCounter, 1085 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1004 SdHoareTripleChecker+Valid, 1303 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:44:30,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1004 Valid, 1303 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 03:44:30,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2022-11-03 03:44:30,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 281. [2022-11-03 03:44:30,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 1.2607142857142857) internal successors, (353), 280 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:30,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 353 transitions. [2022-11-03 03:44:30,361 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 353 transitions. Word has length 190 [2022-11-03 03:44:30,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:44:30,362 INFO L495 AbstractCegarLoop]: Abstraction has 281 states and 353 transitions. [2022-11-03 03:44:30,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 23.75) internal successors, (190), 8 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:30,362 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 353 transitions. [2022-11-03 03:44:30,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-11-03 03:44:30,363 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:44:30,363 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-03 03:44:30,378 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2022-11-03 03:44:30,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:44:30,578 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:44:30,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:44:30,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1790111659, now seen corresponding path program 1 times [2022-11-03 03:44:30,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:44:30,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [902981869] [2022-11-03 03:44:30,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:44:30,579 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:44:30,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:44:30,580 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:44:30,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-11-03 03:44:30,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:44:30,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 782 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 03:44:30,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:44:31,226 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:44:31,227 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:44:31,227 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:44:31,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [902981869] [2022-11-03 03:44:31,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [902981869] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:44:31,227 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:44:31,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 03:44:31,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441424342] [2022-11-03 03:44:31,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:44:31,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 03:44:31,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:44:31,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 03:44:31,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 03:44:31,229 INFO L87 Difference]: Start difference. First operand 281 states and 353 transitions. Second operand has 10 states, 10 states have (on average 19.0) internal successors, (190), 10 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:31,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:44:31,819 INFO L93 Difference]: Finished difference Result 1146 states and 1421 transitions. [2022-11-03 03:44:31,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-03 03:44:31,820 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 19.0) internal successors, (190), 10 states have internal predecessors, (190), 0 states have call successors, (0), 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 190 [2022-11-03 03:44:31,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:44:31,823 INFO L225 Difference]: With dead ends: 1146 [2022-11-03 03:44:31,823 INFO L226 Difference]: Without dead ends: 1007 [2022-11-03 03:44:31,824 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=189, Invalid=623, Unknown=0, NotChecked=0, Total=812 [2022-11-03 03:44:31,824 INFO L413 NwaCegarLoop]: 256 mSDtfsCounter, 1660 mSDsluCounter, 2035 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1660 SdHoareTripleChecker+Valid, 2291 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:44:31,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1660 Valid, 2291 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 03:44:31,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1007 states. [2022-11-03 03:44:31,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1007 to 353. [2022-11-03 03:44:31,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 1.2755681818181819) internal successors, (449), 352 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:31,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 449 transitions. [2022-11-03 03:44:31,837 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 449 transitions. Word has length 190 [2022-11-03 03:44:31,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:44:31,838 INFO L495 AbstractCegarLoop]: Abstraction has 353 states and 449 transitions. [2022-11-03 03:44:31,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 19.0) internal successors, (190), 10 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:31,838 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 449 transitions. [2022-11-03 03:44:31,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-11-03 03:44:31,839 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:44:31,839 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-03 03:44:31,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-11-03 03:44:32,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:44:32,054 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:44:32,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:44:32,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1817177261, now seen corresponding path program 1 times [2022-11-03 03:44:32,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:44:32,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [864613786] [2022-11-03 03:44:32,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:44:32,055 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:44:32,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:44:32,056 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:44:32,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-11-03 03:44:32,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:44:32,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 782 conjuncts, 115 conjunts are in the unsatisfiable core [2022-11-03 03:44:32,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:44:36,830 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 30 proven. 35 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 03:44:36,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:55:25,609 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 16 proven. 35 refuted. 14 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 03:55:25,609 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:55:25,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [864613786] [2022-11-03 03:55:25,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [864613786] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:55:25,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [268831709] [2022-11-03 03:55:25,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:55:25,610 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:55:25,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:55:25,612 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:55:25,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2022-11-03 03:55:26,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:55:26,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 782 conjuncts, 115 conjunts are in the unsatisfiable core [2022-11-03 03:55:26,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:55:28,038 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 30 proven. 35 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 03:55:28,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:56:17,616 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 16 proven. 35 refuted. 14 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 03:56:17,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [268831709] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:56:17,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571407287] [2022-11-03 03:56:17,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:17,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:56:17,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:56:17,620 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:56:17,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-11-03 03:56:17,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:17,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 782 conjuncts, 118 conjunts are in the unsatisfiable core [2022-11-03 03:56:17,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:19,685 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 30 proven. 35 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 03:56:19,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:57:30,055 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 16 proven. 35 refuted. 14 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 03:57:30,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571407287] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:57:30,056 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:57:30,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51, 51, 52, 52] total 102 [2022-11-03 03:57:30,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271266733] [2022-11-03 03:57:30,057 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:57:30,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-11-03 03:57:30,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:57:30,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-11-03 03:57:30,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=342, Invalid=9663, Unknown=297, NotChecked=0, Total=10302 [2022-11-03 03:57:30,061 INFO L87 Difference]: Start difference. First operand 353 states and 449 transitions. Second operand has 102 states, 102 states have (on average 3.588235294117647) internal successors, (366), 102 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:57:44,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:57:44,338 INFO L93 Difference]: Finished difference Result 1227 states and 1575 transitions. [2022-11-03 03:57:44,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-11-03 03:57:44,339 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 3.588235294117647) internal successors, (366), 102 states have internal predecessors, (366), 0 states have call successors, (0), 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 190 [2022-11-03 03:57:44,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:57:44,342 INFO L225 Difference]: With dead ends: 1227 [2022-11-03 03:57:44,342 INFO L226 Difference]: Without dead ends: 1225 [2022-11-03 03:57:44,346 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1206 GetRequests, 1021 SyntacticMatches, 23 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5987 ImplicationChecksByTransitivity, 780.2s TimeCoverageRelationStatistics Valid=1732, Invalid=24703, Unknown=297, NotChecked=0, Total=26732 [2022-11-03 03:57:44,346 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 1508 mSDsluCounter, 8241 mSDsCounter, 0 mSdLazyCounter, 776 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1508 SdHoareTripleChecker+Valid, 8338 SdHoareTripleChecker+Invalid, 5444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 776 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4512 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 03:57:44,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1508 Valid, 8338 Invalid, 5444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 776 Invalid, 0 Unknown, 4512 Unchecked, 0.7s Time] [2022-11-03 03:57:44,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1225 states. [2022-11-03 03:57:44,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1225 to 584. [2022-11-03 03:57:44,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 584 states, 583 states have (on average 1.2692967409948541) internal successors, (740), 583 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:57:44,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 740 transitions. [2022-11-03 03:57:44,367 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 740 transitions. Word has length 190 [2022-11-03 03:57:44,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:57:44,367 INFO L495 AbstractCegarLoop]: Abstraction has 584 states and 740 transitions. [2022-11-03 03:57:44,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 3.588235294117647) internal successors, (366), 102 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:57:44,368 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 740 transitions. [2022-11-03 03:57:44,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-11-03 03:57:44,369 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:57:44,370 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-03 03:57:44,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2022-11-03 03:57:44,604 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-11-03 03:57:44,787 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (38)] Ended with exit code 0 [2022-11-03 03:57:44,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:57:44,984 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:57:44,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:57:44,985 INFO L85 PathProgramCache]: Analyzing trace with hash -939450005, now seen corresponding path program 1 times [2022-11-03 03:57:44,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:57:44,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1622685049] [2022-11-03 03:57:44,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:57:44,985 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:57:44,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:57:44,986 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:57:44,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-11-03 03:57:45,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:57:45,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 782 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:57:45,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:57:45,436 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 50 proven. 1 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 03:57:45,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:57:45,662 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 50 proven. 1 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 03:57:45,662 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:57:45,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1622685049] [2022-11-03 03:57:45,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1622685049] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:57:45,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1841288594] [2022-11-03 03:57:45,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:57:45,663 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:57:45,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:57:45,666 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:57:45,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2022-11-03 03:57:46,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:57:46,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 782 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:57:46,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:57:46,246 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 50 proven. 1 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 03:57:46,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:57:46,430 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 50 proven. 1 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 03:57:46,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1841288594] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:57:46,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062209820] [2022-11-03 03:57:46,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:57:46,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:57:46,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:57:46,432 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:57:46,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-11-03 03:57:46,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:57:46,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 782 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:57:46,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:57:46,873 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 50 proven. 1 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 03:57:46,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:57:47,032 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 50 proven. 1 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 03:57:47,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062209820] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:57:47,032 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:57:47,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 6 [2022-11-03 03:57:47,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797404508] [2022-11-03 03:57:47,033 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:57:47,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:57:47,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:57:47,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:57:47,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:57:47,035 INFO L87 Difference]: Start difference. First operand 584 states and 740 transitions. Second operand has 6 states, 6 states have (on average 47.333333333333336) internal successors, (284), 6 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:57:47,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:57:47,101 INFO L93 Difference]: Finished difference Result 1092 states and 1392 transitions. [2022-11-03 03:57:47,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:57:47,102 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 47.333333333333336) internal successors, (284), 6 states have internal predecessors, (284), 0 states have call successors, (0), 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 190 [2022-11-03 03:57:47,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:57:47,104 INFO L225 Difference]: With dead ends: 1092 [2022-11-03 03:57:47,104 INFO L226 Difference]: Without dead ends: 534 [2022-11-03 03:57:47,105 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1135 GetRequests, 1130 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:57:47,105 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 174 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:57:47,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 187 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:57:47,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2022-11-03 03:57:47,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 534. [2022-11-03 03:57:47,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534 states, 533 states have (on average 1.2701688555347093) internal successors, (677), 533 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:57:47,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 677 transitions. [2022-11-03 03:57:47,119 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 677 transitions. Word has length 190 [2022-11-03 03:57:47,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:57:47,120 INFO L495 AbstractCegarLoop]: Abstraction has 534 states and 677 transitions. [2022-11-03 03:57:47,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 47.333333333333336) internal successors, (284), 6 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:57:47,120 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 677 transitions. [2022-11-03 03:57:47,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-11-03 03:57:47,121 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:57:47,122 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-03 03:57:47,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (41)] Forceful destruction successful, exit code 0 [2022-11-03 03:57:47,345 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-11-03 03:57:47,534 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (40)] Ended with exit code 0 [2022-11-03 03:57:47,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:57:47,725 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:57:47,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:57:47,726 INFO L85 PathProgramCache]: Analyzing trace with hash -1891513813, now seen corresponding path program 1 times [2022-11-03 03:57:47,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:57:47,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1680203313] [2022-11-03 03:57:47,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:57:47,727 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:57:47,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:57:47,727 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:57:47,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-11-03 03:57:47,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:57:47,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 782 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-03 03:57:47,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:57:48,672 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:57:48,673 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:57:48,673 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:57:48,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1680203313] [2022-11-03 03:57:48,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1680203313] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:57:48,673 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:57:48,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 03:57:48,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85141109] [2022-11-03 03:57:48,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:57:48,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 03:57:48,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:57:48,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 03:57:48,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:57:48,675 INFO L87 Difference]: Start difference. First operand 534 states and 677 transitions. Second operand has 8 states, 8 states have (on average 23.75) internal successors, (190), 8 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:57:48,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:57:48,997 INFO L93 Difference]: Finished difference Result 1076 states and 1352 transitions. [2022-11-03 03:57:48,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 03:57:48,997 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 23.75) internal successors, (190), 8 states have internal predecessors, (190), 0 states have call successors, (0), 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 190 [2022-11-03 03:57:48,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:57:48,999 INFO L225 Difference]: With dead ends: 1076 [2022-11-03 03:57:48,999 INFO L226 Difference]: Without dead ends: 913 [2022-11-03 03:57:48,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-03 03:57:49,000 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 410 mSDsluCounter, 965 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 1161 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 316 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:57:49,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [410 Valid, 1161 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 246 Invalid, 0 Unknown, 316 Unchecked, 0.3s Time] [2022-11-03 03:57:49,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 913 states. [2022-11-03 03:57:49,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 913 to 526. [2022-11-03 03:57:49,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 526 states, 525 states have (on average 1.262857142857143) internal successors, (663), 525 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:57:49,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 663 transitions. [2022-11-03 03:57:49,016 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 663 transitions. Word has length 190 [2022-11-03 03:57:49,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:57:49,017 INFO L495 AbstractCegarLoop]: Abstraction has 526 states and 663 transitions. [2022-11-03 03:57:49,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 23.75) internal successors, (190), 8 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:57:49,017 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 663 transitions. [2022-11-03 03:57:49,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-11-03 03:57:49,018 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:57:49,019 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-03 03:57:49,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2022-11-03 03:57:49,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:57:49,233 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:57:49,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:57:49,233 INFO L85 PathProgramCache]: Analyzing trace with hash -510678997, now seen corresponding path program 1 times [2022-11-03 03:57:49,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:57:49,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2121347656] [2022-11-03 03:57:49,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:57:49,234 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:57:49,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:57:49,235 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:57:49,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-11-03 03:57:49,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:57:49,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 782 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-03 03:57:49,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:57:50,210 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:57:50,210 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:57:50,210 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:57:50,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2121347656] [2022-11-03 03:57:50,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2121347656] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:57:50,211 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:57:50,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 03:57:50,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311292705] [2022-11-03 03:57:50,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:57:50,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 03:57:50,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:57:50,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 03:57:50,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:57:50,213 INFO L87 Difference]: Start difference. First operand 526 states and 663 transitions. Second operand has 8 states, 8 states have (on average 23.75) internal successors, (190), 8 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:57:50,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:57:50,762 INFO L93 Difference]: Finished difference Result 1003 states and 1267 transitions. [2022-11-03 03:57:50,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 03:57:50,763 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 23.75) internal successors, (190), 8 states have internal predecessors, (190), 0 states have call successors, (0), 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 190 [2022-11-03 03:57:50,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:57:50,764 INFO L225 Difference]: With dead ends: 1003 [2022-11-03 03:57:50,764 INFO L226 Difference]: Without dead ends: 856 [2022-11-03 03:57:50,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-11-03 03:57:50,765 INFO L413 NwaCegarLoop]: 342 mSDtfsCounter, 442 mSDsluCounter, 1341 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 1683 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 119 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:57:50,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [442 Valid, 1683 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 473 Invalid, 0 Unknown, 119 Unchecked, 0.4s Time] [2022-11-03 03:57:50,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 856 states. [2022-11-03 03:57:50,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 856 to 552. [2022-11-03 03:57:50,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 551 states have (on average 1.263157894736842) internal successors, (696), 551 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:57:50,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 696 transitions. [2022-11-03 03:57:50,780 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 696 transitions. Word has length 190 [2022-11-03 03:57:50,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:57:50,781 INFO L495 AbstractCegarLoop]: Abstraction has 552 states and 696 transitions. [2022-11-03 03:57:50,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 23.75) internal successors, (190), 8 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:57:50,781 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 696 transitions. [2022-11-03 03:57:50,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-11-03 03:57:50,782 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:57:50,783 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-03 03:57:50,797 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (44)] Ended with exit code 0 [2022-11-03 03:57:50,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:57:50,997 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:57:50,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:57:50,997 INFO L85 PathProgramCache]: Analyzing trace with hash 814177197, now seen corresponding path program 1 times [2022-11-03 03:57:50,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:57:50,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1862925673] [2022-11-03 03:57:50,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:57:50,998 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:57:50,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:57:50,999 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:57:51,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918e6cca-8261-431d-8f44-92983ef07c96/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-11-03 03:57:51,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:57:51,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 782 conjuncts, 115 conjunts are in the unsatisfiable core [2022-11-03 03:57:51,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:57:54,980 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 12 proven. 59 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 03:57:54,980 INFO L328 TraceCheckSpWp]: Computing backward predicates...