./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_QF_BV_vMiim_p2.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/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_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_QF_BV_vMiim_p2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/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_e8d42495-6582-4354-a97c-6cbe1ac1c74f/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 e717dbaa7c87680e2898e20401e6a0e780331d7eabb7d7391b67acb5da3c5ec1 --- 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 03:59:20,955 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:59:20,958 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:59:21,011 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:59:21,012 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:59:21,017 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:59:21,019 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:59:21,022 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:59:21,028 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:59:21,030 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:59:21,031 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:59:21,033 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:59:21,035 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:59:21,039 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:59:21,041 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:59:21,044 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:59:21,046 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:59:21,055 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:59:21,057 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:59:21,059 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:59:21,063 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:59:21,066 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:59:21,068 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:59:21,070 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:59:21,075 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:59:21,081 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:59:21,081 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:59:21,082 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:59:21,084 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:59:21,085 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:59:21,087 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:59:21,088 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:59:21,090 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:59:21,091 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:59:21,092 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:59:21,092 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:59:21,093 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:59:21,093 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:59:21,093 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:59:21,094 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:59:21,095 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:59:21,096 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 03:59:21,125 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:59:21,125 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:59:21,126 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:59:21,126 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:59:21,127 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:59:21,127 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:59:21,128 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:59:21,128 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:59:21,128 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:59:21,129 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 03:59:21,129 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:59:21,129 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:59:21,130 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 03:59:21,130 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 03:59:21,130 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:59:21,130 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 03:59:21,131 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 03:59:21,131 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 03:59:21,132 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:59:21,132 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 03:59:21,132 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:59:21,133 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 03:59:21,133 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:59:21,133 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 03:59:21,133 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 03:59:21,134 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:59:21,134 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 03:59:21,134 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:59:21,135 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:59:21,135 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:59:21,135 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:59:21,135 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 03:59:21,136 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:59:21,136 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 03:59:21,136 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 03:59:21,136 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 03:59:21,137 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 03:59:21,137 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:59:21,137 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_e8d42495-6582-4354-a97c-6cbe1ac1c74f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e717dbaa7c87680e2898e20401e6a0e780331d7eabb7d7391b67acb5da3c5ec1 [2022-11-03 03:59:21,446 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:59:21,489 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:59:21,492 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:59:21,494 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:59:21,495 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:59:21,496 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_QF_BV_vMiim_p2.c [2022-11-03 03:59:21,576 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/data/e9247a6f9/bd2f1254e6044c319259d53d671fdc40/FLAG6ae652fe6 [2022-11-03 03:59:22,219 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:59:22,219 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_QF_BV_vMiim_p2.c [2022-11-03 03:59:22,234 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/data/e9247a6f9/bd2f1254e6044c319259d53d671fdc40/FLAG6ae652fe6 [2022-11-03 03:59:22,469 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/data/e9247a6f9/bd2f1254e6044c319259d53d671fdc40 [2022-11-03 03:59:22,472 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:59:22,474 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:59:22,476 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:59:22,476 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:59:22,485 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:59:22,486 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:59:22" (1/1) ... [2022-11-03 03:59:22,489 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41e2e413 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:59:22, skipping insertion in model container [2022-11-03 03:59:22,489 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:59:22" (1/1) ... [2022-11-03 03:59:22,499 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:59:22,575 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:59:22,807 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_e8d42495-6582-4354-a97c-6cbe1ac1c74f/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_QF_BV_vMiim_p2.c[1107,1120] [2022-11-03 03:59:23,100 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:59:23,104 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:59:23,117 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_e8d42495-6582-4354-a97c-6cbe1ac1c74f/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_QF_BV_vMiim_p2.c[1107,1120] [2022-11-03 03:59:23,206 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:59:23,225 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:59:23,226 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:59:23 WrapperNode [2022-11-03 03:59:23,226 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:59:23,227 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:59:23,227 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:59:23,227 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:59:23,242 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:59:23" (1/1) ... [2022-11-03 03:59:23,279 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:59:23" (1/1) ... [2022-11-03 03:59:23,384 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 974 [2022-11-03 03:59:23,384 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:59:23,385 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:59:23,385 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:59:23,386 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:59:23,397 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:59:23" (1/1) ... [2022-11-03 03:59:23,397 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:59:23" (1/1) ... [2022-11-03 03:59:23,411 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:59:23" (1/1) ... [2022-11-03 03:59:23,412 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:59:23" (1/1) ... [2022-11-03 03:59:23,443 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:59:23" (1/1) ... [2022-11-03 03:59:23,450 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:59:23" (1/1) ... [2022-11-03 03:59:23,459 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:59:23" (1/1) ... [2022-11-03 03:59:23,466 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:59:23" (1/1) ... [2022-11-03 03:59:23,501 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:59:23,502 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:59:23,503 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:59:23,503 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:59:23,504 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:59:23" (1/1) ... [2022-11-03 03:59:23,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:59:23,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:59:23,550 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:59:23,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:59:23,609 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:59:23,609 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:59:23,901 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:59:23,904 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:59:25,446 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:59:27,588 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:59:27,589 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 03:59:27,592 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:59:27 BoogieIcfgContainer [2022-11-03 03:59:27,592 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:59:27,595 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:59:27,595 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:59:27,599 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:59:27,600 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:59:22" (1/3) ... [2022-11-03 03:59:27,601 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21540dcc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:59:27, skipping insertion in model container [2022-11-03 03:59:27,601 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:59:23" (2/3) ... [2022-11-03 03:59:27,602 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21540dcc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:59:27, skipping insertion in model container [2022-11-03 03:59:27,602 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:59:27" (3/3) ... [2022-11-03 03:59:27,604 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.vis_QF_BV_vMiim_p2.c [2022-11-03 03:59:27,626 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:59:27,626 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 03:59:27,701 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:59:27,719 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;@40e7ce55, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:59:27,728 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 03:59:27,732 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 03:59:27,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-03 03:59:27,740 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:59:27,740 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-03 03:59:27,742 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:59:27,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:59:27,750 INFO L85 PathProgramCache]: Analyzing trace with hash 13922425, now seen corresponding path program 1 times [2022-11-03 03:59:27,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:59:27,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268059609] [2022-11-03 03:59:27,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:59:27,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:59:28,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 03:59:28,179 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-03 03:59:28,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 03:59:28,342 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-03 03:59:28,345 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-03 03:59:28,346 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-03 03:59:28,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 03:59:28,354 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-03 03:59:28,359 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-03 03:59:28,400 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2022-11-03 03:59:28,412 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 03:59:28 BoogieIcfgContainer [2022-11-03 03:59:28,412 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-03 03:59:28,413 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-03 03:59:28,413 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-03 03:59:28,414 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-03 03:59:28,414 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:59:27" (3/4) ... [2022-11-03 03:59:28,418 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-03 03:59:28,418 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-03 03:59:28,420 INFO L158 Benchmark]: Toolchain (without parser) took 5945.72ms. Allocated memory was 117.4MB in the beginning and 241.2MB in the end (delta: 123.7MB). Free memory was 73.6MB in the beginning and 72.2MB in the end (delta: 1.4MB). Peak memory consumption was 125.8MB. Max. memory is 16.1GB. [2022-11-03 03:59:28,420 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 117.4MB. Free memory is still 91.9MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 03:59:28,421 INFO L158 Benchmark]: CACSL2BoogieTranslator took 750.56ms. Allocated memory is still 117.4MB. Free memory was 73.4MB in the beginning and 74.8MB in the end (delta: -1.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-03 03:59:28,422 INFO L158 Benchmark]: Boogie Procedure Inliner took 157.79ms. Allocated memory is still 117.4MB. Free memory was 74.8MB in the beginning and 63.6MB in the end (delta: 11.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-03 03:59:28,423 INFO L158 Benchmark]: Boogie Preprocessor took 116.34ms. Allocated memory is still 117.4MB. Free memory was 63.6MB in the beginning and 57.3MB in the end (delta: 6.4MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-11-03 03:59:28,424 INFO L158 Benchmark]: RCFGBuilder took 4089.85ms. Allocated memory was 117.4MB in the beginning and 241.2MB in the end (delta: 123.7MB). Free memory was 57.3MB in the beginning and 115.2MB in the end (delta: -57.9MB). Peak memory consumption was 128.6MB. Max. memory is 16.1GB. [2022-11-03 03:59:28,425 INFO L158 Benchmark]: TraceAbstraction took 817.71ms. Allocated memory is still 241.2MB. Free memory was 114.1MB in the beginning and 73.2MB in the end (delta: 40.9MB). Peak memory consumption was 39.8MB. Max. memory is 16.1GB. [2022-11-03 03:59:28,425 INFO L158 Benchmark]: Witness Printer took 5.17ms. Allocated memory is still 241.2MB. Free memory was 73.2MB in the beginning and 72.2MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 03:59:28,430 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 117.4MB. Free memory is still 91.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 750.56ms. Allocated memory is still 117.4MB. Free memory was 73.4MB in the beginning and 74.8MB in the end (delta: -1.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 157.79ms. Allocated memory is still 117.4MB. Free memory was 74.8MB in the beginning and 63.6MB in the end (delta: 11.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Preprocessor took 116.34ms. Allocated memory is still 117.4MB. Free memory was 63.6MB in the beginning and 57.3MB in the end (delta: 6.4MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * RCFGBuilder took 4089.85ms. Allocated memory was 117.4MB in the beginning and 241.2MB in the end (delta: 123.7MB). Free memory was 57.3MB in the beginning and 115.2MB in the end (delta: -57.9MB). Peak memory consumption was 128.6MB. Max. memory is 16.1GB. * TraceAbstraction took 817.71ms. Allocated memory is still 241.2MB. Free memory was 114.1MB in the beginning and 73.2MB in the end (delta: 40.9MB). Peak memory consumption was 39.8MB. Max. memory is 16.1GB. * Witness Printer took 5.17ms. Allocated memory is still 241.2MB. Free memory was 73.2MB in the beginning and 72.2MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. 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 233, overapproximation of bitwiseOr at line 219, overapproximation of bitwiseAnd at line 197. Possible FailurePath: [L25] const SORT_1 mask_SORT_1 = (SORT_1)-1 >> (sizeof(SORT_1) * 8 - 1); [L26] const SORT_1 msb_SORT_1 = (SORT_1)1 << (1 - 1); [L28] const SORT_3 mask_SORT_3 = (SORT_3)-1 >> (sizeof(SORT_3) * 8 - 16); [L29] const SORT_3 msb_SORT_3 = (SORT_3)1 << (16 - 1); [L31] const SORT_5 mask_SORT_5 = (SORT_5)-1 >> (sizeof(SORT_5) * 8 - 8); [L32] const SORT_5 msb_SORT_5 = (SORT_5)1 << (8 - 1); [L34] const SORT_7 mask_SORT_7 = (SORT_7)-1 >> (sizeof(SORT_7) * 8 - 5); [L35] const SORT_7 msb_SORT_7 = (SORT_7)1 << (5 - 1); [L37] const SORT_45 mask_SORT_45 = (SORT_45)-1 >> (sizeof(SORT_45) * 8 - 6); [L38] const SORT_45 msb_SORT_45 = (SORT_45)1 << (6 - 1); [L40] const SORT_55 mask_SORT_55 = (SORT_55)-1 >> (sizeof(SORT_55) * 8 - 32); [L41] const SORT_55 msb_SORT_55 = (SORT_55)1 << (32 - 1); [L43] const SORT_61 mask_SORT_61 = (SORT_61)-1 >> (sizeof(SORT_61) * 8 - 25); [L44] const SORT_61 msb_SORT_61 = (SORT_61)1 << (25 - 1); [L46] const SORT_63 mask_SORT_63 = (SORT_63)-1 >> (sizeof(SORT_63) * 8 - 7); [L47] const SORT_63 msb_SORT_63 = (SORT_63)1 << (7 - 1); [L49] const SORT_84 mask_SORT_84 = (SORT_84)-1 >> (sizeof(SORT_84) * 8 - 2); [L50] const SORT_84 msb_SORT_84 = (SORT_84)1 << (2 - 1); [L52] const SORT_122 mask_SORT_122 = (SORT_122)-1 >> (sizeof(SORT_122) * 8 - 3); [L53] const SORT_122 msb_SORT_122 = (SORT_122)1 << (3 - 1); [L55] const SORT_1 var_17 = 0; [L56] const SORT_1 var_41 = 1; [L57] const SORT_45 var_46 = 0; [L58] const SORT_5 var_50 = 0; [L59] const SORT_5 var_56 = 2; [L60] const SORT_55 var_58 = 2; [L61] const SORT_61 var_62 = 0; [L62] const SORT_55 var_66 = 1; [L63] const SORT_55 var_112 = 0; [L64] const SORT_45 var_218 = 33; [L65] const SORT_5 var_227 = 1; [L67] SORT_1 input_2; [L68] SORT_3 input_4; [L69] SORT_5 input_6; [L70] SORT_7 input_8; [L71] SORT_1 input_9; [L72] SORT_1 input_10; [L73] SORT_1 input_11; [L74] SORT_1 input_12; [L75] SORT_7 input_13; [L76] SORT_1 input_14; [L77] SORT_1 input_15; [L78] SORT_1 input_16; [L79] SORT_84 input_85; [L80] SORT_1 input_87; [L81] SORT_1 input_89; [L82] SORT_1 input_91; [L83] SORT_1 input_99; [L84] SORT_1 input_105; [L85] SORT_1 input_134; [L86] SORT_1 input_149; [L87] SORT_7 input_162; [L88] SORT_1 input_164; [L89] SORT_3 input_166; [L90] SORT_5 input_168; [L91] SORT_1 input_179; [L93] SORT_1 state_18 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L94] SORT_1 state_20 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L95] SORT_1 state_23 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L96] SORT_1 state_26 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L97] SORT_1 state_29 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L98] SORT_1 state_32 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L99] SORT_1 state_36 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L100] SORT_45 state_47 = __VERIFIER_nondet_uchar() & mask_SORT_45; [L101] SORT_5 state_51 = __VERIFIER_nondet_uchar() & mask_SORT_5; [L102] SORT_1 state_70 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L103] SORT_1 state_76 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L104] SORT_1 state_80 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L105] SORT_1 state_82 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L106] SORT_1 state_93 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L107] SORT_1 state_95 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L108] SORT_1 state_97 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L109] SORT_1 state_101 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L110] SORT_1 state_103 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L111] SORT_1 state_107 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L112] SORT_1 state_136 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L113] SORT_1 state_138 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L114] SORT_1 state_140 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L115] SORT_1 state_142 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L116] SORT_1 state_144 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L117] SORT_1 state_151 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L118] SORT_1 state_153 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L119] SORT_1 state_170 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L120] SORT_1 state_172 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L121] SORT_1 state_181 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L122] SORT_1 state_183 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L123] SORT_1 state_185 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L125] SORT_1 init_19_arg_1 = var_17; [L126] state_18 = init_19_arg_1 [L127] SORT_1 init_21_arg_1 = var_17; [L128] state_20 = init_21_arg_1 [L129] SORT_1 init_24_arg_1 = var_17; [L130] state_23 = init_24_arg_1 [L131] SORT_1 init_27_arg_1 = var_17; [L132] state_26 = init_27_arg_1 [L133] SORT_1 init_30_arg_1 = var_17; [L134] state_29 = init_30_arg_1 [L135] SORT_1 init_33_arg_1 = var_17; [L136] state_32 = init_33_arg_1 [L137] SORT_1 init_37_arg_1 = var_17; [L138] state_36 = init_37_arg_1 [L139] SORT_45 init_48_arg_1 = var_46; [L140] state_47 = init_48_arg_1 [L141] SORT_5 init_52_arg_1 = var_50; [L142] state_51 = init_52_arg_1 [L143] SORT_1 init_71_arg_1 = var_17; [L144] state_70 = init_71_arg_1 [L145] SORT_1 init_77_arg_1 = var_17; [L146] state_76 = init_77_arg_1 [L147] SORT_1 init_81_arg_1 = var_17; [L148] state_80 = init_81_arg_1 [L149] SORT_1 init_83_arg_1 = var_17; [L150] state_82 = init_83_arg_1 [L151] SORT_1 init_94_arg_1 = var_17; [L152] state_93 = init_94_arg_1 [L153] SORT_1 init_96_arg_1 = var_17; [L154] state_95 = init_96_arg_1 [L155] SORT_1 init_98_arg_1 = var_17; [L156] state_97 = init_98_arg_1 [L157] SORT_1 init_102_arg_1 = var_17; [L158] state_101 = init_102_arg_1 [L159] SORT_1 init_104_arg_1 = var_17; [L160] state_103 = init_104_arg_1 [L161] SORT_1 init_108_arg_1 = var_17; [L162] state_107 = init_108_arg_1 [L163] SORT_1 init_137_arg_1 = var_17; [L164] state_136 = init_137_arg_1 [L165] SORT_1 init_139_arg_1 = var_17; [L166] state_138 = init_139_arg_1 [L167] SORT_1 init_141_arg_1 = var_17; [L168] state_140 = init_141_arg_1 [L169] SORT_1 init_143_arg_1 = var_17; [L170] state_142 = init_143_arg_1 [L171] SORT_1 init_145_arg_1 = var_17; [L172] state_144 = init_145_arg_1 [L173] SORT_1 init_152_arg_1 = var_17; [L174] state_151 = init_152_arg_1 [L175] SORT_1 init_154_arg_1 = var_17; [L176] state_153 = init_154_arg_1 [L177] SORT_1 init_171_arg_1 = var_17; [L178] state_170 = init_171_arg_1 [L179] SORT_1 init_173_arg_1 = var_17; [L180] state_172 = init_173_arg_1 [L181] SORT_1 init_182_arg_1 = var_17; [L182] state_181 = init_182_arg_1 [L183] SORT_1 init_184_arg_1 = var_17; [L184] state_183 = init_184_arg_1 [L185] SORT_1 init_186_arg_1 = var_17; [L186] state_185 = init_186_arg_1 VAL [init_102_arg_1=0, init_104_arg_1=0, init_108_arg_1=0, init_137_arg_1=0, init_139_arg_1=0, init_141_arg_1=0, init_143_arg_1=0, init_145_arg_1=0, init_152_arg_1=0, init_154_arg_1=0, init_171_arg_1=0, init_173_arg_1=0, init_182_arg_1=0, init_184_arg_1=0, init_186_arg_1=0, init_19_arg_1=0, init_21_arg_1=0, init_24_arg_1=0, init_27_arg_1=0, init_30_arg_1=0, init_33_arg_1=0, init_37_arg_1=0, init_48_arg_1=0, init_52_arg_1=0, init_71_arg_1=0, init_77_arg_1=0, init_81_arg_1=0, init_83_arg_1=0, init_94_arg_1=0, init_96_arg_1=0, init_98_arg_1=0, mask_SORT_1=1, mask_SORT_122=7, mask_SORT_3=65535, mask_SORT_45=63, mask_SORT_5=255, mask_SORT_55=4294967295, mask_SORT_61=4294967295, mask_SORT_63=127, mask_SORT_7=31, mask_SORT_84=3, msb_SORT_1=1, msb_SORT_122=4, msb_SORT_3=32768, msb_SORT_45=32, msb_SORT_5=128, msb_SORT_55=2147483648, msb_SORT_61=16777216, msb_SORT_63=64, msb_SORT_7=16, msb_SORT_84=2, state_101=0, state_103=0, state_107=0, state_136=0, state_138=0, state_140=0, state_142=0, state_144=0, state_151=0, state_153=0, state_170=0, state_172=0, state_18=0, state_181=0, state_183=0, state_185=0, state_20=0, state_23=0, state_26=0, state_29=0, state_32=0, state_36=0, state_47=0, state_51=0, state_70=0, state_76=0, state_80=0, state_82=0, state_93=0, state_95=0, state_97=0, var_112=0, var_17=0, var_218=33, var_227=1, var_41=1, var_46=0, var_50=0, var_56=2, var_58=2, var_62=0, var_66=1] [L189] input_2 = __VERIFIER_nondet_uchar() [L190] input_4 = __VERIFIER_nondet_ushort() [L191] input_6 = __VERIFIER_nondet_uchar() [L192] input_8 = __VERIFIER_nondet_uchar() [L193] input_9 = __VERIFIER_nondet_uchar() [L194] input_10 = __VERIFIER_nondet_uchar() [L195] input_11 = __VERIFIER_nondet_uchar() [L196] input_12 = __VERIFIER_nondet_uchar() [L197] input_12 = input_12 & mask_SORT_1 [L198] input_13 = __VERIFIER_nondet_uchar() [L199] input_14 = __VERIFIER_nondet_uchar() [L200] input_15 = __VERIFIER_nondet_uchar() [L201] input_16 = __VERIFIER_nondet_uchar() [L202] input_85 = __VERIFIER_nondet_uchar() [L203] input_87 = __VERIFIER_nondet_uchar() [L204] input_89 = __VERIFIER_nondet_uchar() [L205] input_91 = __VERIFIER_nondet_uchar() [L206] input_99 = __VERIFIER_nondet_uchar() [L207] input_105 = __VERIFIER_nondet_uchar() [L208] input_134 = __VERIFIER_nondet_uchar() [L209] input_149 = __VERIFIER_nondet_uchar() [L210] input_162 = __VERIFIER_nondet_uchar() [L211] input_164 = __VERIFIER_nondet_uchar() [L212] input_166 = __VERIFIER_nondet_ushort() [L213] input_168 = __VERIFIER_nondet_uchar() [L214] input_179 = __VERIFIER_nondet_uchar() [L217] SORT_1 var_22_arg_0 = state_18; [L218] SORT_1 var_22_arg_1 = state_20; [L219] SORT_1 var_22 = var_22_arg_0 | var_22_arg_1; [L220] SORT_1 var_25_arg_0 = var_22; [L221] SORT_1 var_25_arg_1 = state_23; [L222] SORT_1 var_25 = var_25_arg_0 | var_25_arg_1; [L223] SORT_1 var_28_arg_0 = var_25; [L224] SORT_1 var_28_arg_1 = state_26; [L225] SORT_1 var_28 = var_28_arg_0 | var_28_arg_1; [L226] SORT_1 var_31_arg_0 = var_28; [L227] SORT_1 var_31_arg_1 = state_29; [L228] SORT_1 var_31 = var_31_arg_0 | var_31_arg_1; [L229] SORT_1 var_34_arg_0 = var_31; [L230] SORT_1 var_34_arg_1 = state_32; [L231] SORT_1 var_34 = var_34_arg_0 | var_34_arg_1; [L232] SORT_1 var_35_arg_0 = var_34; [L233] SORT_1 var_35 = ~var_35_arg_0; [L234] SORT_1 var_38_arg_0 = var_35; [L235] SORT_1 var_38_arg_1 = state_36; [L236] SORT_1 var_38 = var_38_arg_0 | var_38_arg_1; [L237] SORT_1 var_42_arg_0 = var_38; [L238] SORT_1 var_42 = ~var_42_arg_0; [L239] SORT_1 var_43_arg_0 = var_41; [L240] SORT_1 var_43_arg_1 = var_42; [L241] SORT_1 var_43 = var_43_arg_0 & var_43_arg_1; [L242] var_43 = var_43 & mask_SORT_1 [L243] SORT_1 bad_44_arg_0 = var_43; [L244] CALL __VERIFIER_assert(!(bad_44_arg_0)) [L20] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L20] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.7s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=7occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s 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 03:59:28,457 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/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_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_QF_BV_vMiim_p2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/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_e8d42495-6582-4354-a97c-6cbe1ac1c74f/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 e717dbaa7c87680e2898e20401e6a0e780331d7eabb7d7391b67acb5da3c5ec1 --- 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 03:59:31,302 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:59:31,305 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:59:31,354 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:59:31,355 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:59:31,359 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:59:31,361 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:59:31,367 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:59:31,376 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:59:31,378 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:59:31,379 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:59:31,380 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:59:31,381 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:59:31,382 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:59:31,383 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:59:31,384 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:59:31,385 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:59:31,386 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:59:31,388 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:59:31,404 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:59:31,405 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:59:31,417 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:59:31,419 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:59:31,420 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:59:31,423 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:59:31,424 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:59:31,424 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:59:31,431 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:59:31,431 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:59:31,432 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:59:31,433 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:59:31,433 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:59:31,434 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:59:31,435 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:59:31,436 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:59:31,437 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:59:31,437 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:59:31,438 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:59:31,461 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:59:31,462 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:59:31,463 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:59:31,465 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2022-11-03 03:59:31,516 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:59:31,517 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:59:31,517 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:59:31,517 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:59:31,518 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:59:31,518 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:59:31,519 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:59:31,519 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:59:31,519 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:59:31,519 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:59:31,520 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:59:31,520 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:59:31,521 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:59:31,521 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:59:31,521 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 03:59:31,521 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:59:31,522 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 03:59:31,522 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 03:59:31,522 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 03:59:31,522 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 03:59:31,523 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 03:59:31,523 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:59:31,523 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 03:59:31,523 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:59:31,524 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 03:59:31,524 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:59:31,524 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:59:31,524 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:59:31,527 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:59:31,527 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 03:59:31,527 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 03:59:31,528 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 03:59:31,528 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 03:59:31,528 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:59:31,528 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 03:59:31,529 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_e8d42495-6582-4354-a97c-6cbe1ac1c74f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e717dbaa7c87680e2898e20401e6a0e780331d7eabb7d7391b67acb5da3c5ec1 [2022-11-03 03:59:31,961 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:59:31,991 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:59:31,996 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:59:31,998 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:59:31,999 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:59:32,001 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_QF_BV_vMiim_p2.c [2022-11-03 03:59:32,075 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/data/82507e41a/ef552de7340540dcbd14ed42489109ac/FLAG79313ba52 [2022-11-03 03:59:32,858 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:59:32,858 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_QF_BV_vMiim_p2.c [2022-11-03 03:59:32,886 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/data/82507e41a/ef552de7340540dcbd14ed42489109ac/FLAG79313ba52 [2022-11-03 03:59:33,110 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/data/82507e41a/ef552de7340540dcbd14ed42489109ac [2022-11-03 03:59:33,115 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:59:33,118 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:59:33,119 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:59:33,120 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:59:33,125 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:59:33,126 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:59:33" (1/1) ... [2022-11-03 03:59:33,128 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9a1a187 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:59:33, skipping insertion in model container [2022-11-03 03:59:33,129 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:59:33" (1/1) ... [2022-11-03 03:59:33,137 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:59:33,205 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:59:33,432 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_e8d42495-6582-4354-a97c-6cbe1ac1c74f/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_QF_BV_vMiim_p2.c[1107,1120] [2022-11-03 03:59:33,793 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:59:33,798 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:59:33,820 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_e8d42495-6582-4354-a97c-6cbe1ac1c74f/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_QF_BV_vMiim_p2.c[1107,1120] [2022-11-03 03:59:33,958 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:59:33,979 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:59:33,986 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:59:33 WrapperNode [2022-11-03 03:59:33,986 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:59:33,988 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:59:33,988 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:59:33,988 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:59:33,997 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:59:33" (1/1) ... [2022-11-03 03:59:34,023 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:59:33" (1/1) ... [2022-11-03 03:59:34,138 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 974 [2022-11-03 03:59:34,139 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:59:34,140 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:59:34,140 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:59:34,140 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:59:34,151 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:59:33" (1/1) ... [2022-11-03 03:59:34,152 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:59:33" (1/1) ... [2022-11-03 03:59:34,164 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:59:33" (1/1) ... [2022-11-03 03:59:34,164 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:59:33" (1/1) ... [2022-11-03 03:59:34,184 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:59:33" (1/1) ... [2022-11-03 03:59:34,192 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:59:33" (1/1) ... [2022-11-03 03:59:34,196 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:59:33" (1/1) ... [2022-11-03 03:59:34,201 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:59:33" (1/1) ... [2022-11-03 03:59:34,209 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:59:34,210 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:59:34,210 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:59:34,211 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:59:34,212 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:59:33" (1/1) ... [2022-11-03 03:59:34,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:59:34,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:59:34,247 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:59:34,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:59:34,317 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:59:34,318 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:59:34,614 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:59:34,617 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:59:35,692 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:59:35,708 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:59:35,709 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 03:59:35,712 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:59:35 BoogieIcfgContainer [2022-11-03 03:59:35,712 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:59:35,716 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:59:35,716 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:59:35,720 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:59:35,721 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:59:33" (1/3) ... [2022-11-03 03:59:35,722 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22eb7815 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:59:35, skipping insertion in model container [2022-11-03 03:59:35,723 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:59:33" (2/3) ... [2022-11-03 03:59:35,723 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22eb7815 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:59:35, skipping insertion in model container [2022-11-03 03:59:35,723 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:59:35" (3/3) ... [2022-11-03 03:59:35,725 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.vis_QF_BV_vMiim_p2.c [2022-11-03 03:59:35,748 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:59:35,748 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 03:59:35,847 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:59:35,858 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;@24f95b07, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:59:35,858 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 03:59:35,865 INFO L276 IsEmpty]: Start isEmpty. Operand has 127 states, 125 states have (on average 1.496) internal successors, (187), 126 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:59:35,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-03 03:59:35,872 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:59:35,873 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-03 03:59:35,874 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:59:35,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:59:35,882 INFO L85 PathProgramCache]: Analyzing trace with hash 28698761, now seen corresponding path program 1 times [2022-11-03 03:59:35,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:59:35,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [786152506] [2022-11-03 03:59:35,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:59:35,901 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:59:35,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:59:35,906 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:59:35,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 03:59:36,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:59:36,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-03 03:59:36,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:59:36,617 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 03:59:36,617 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:59:36,618 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:59:36,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [786152506] [2022-11-03 03:59:36,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [786152506] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:59:36,619 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:59:36,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:59:36,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94849993] [2022-11-03 03:59:36,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:59:36,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:59:36,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:59:36,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:59:36,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:59:36,681 INFO L87 Difference]: Start difference. First operand has 127 states, 125 states have (on average 1.496) internal successors, (187), 126 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:59:36,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:59:36,958 INFO L93 Difference]: Finished difference Result 368 states and 552 transitions. [2022-11-03 03:59:36,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:59:36,962 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-03 03:59:36,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:59:36,974 INFO L225 Difference]: With dead ends: 368 [2022-11-03 03:59:36,974 INFO L226 Difference]: Without dead ends: 243 [2022-11-03 03:59:36,978 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:59:36,982 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 352 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:59:36,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [352 Valid, 502 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:59:37,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-11-03 03:59:37,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 125. [2022-11-03 03:59:37,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.4758064516129032) internal successors, (183), 124 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:59:37,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 183 transitions. [2022-11-03 03:59:37,033 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 183 transitions. Word has length 5 [2022-11-03 03:59:37,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:59:37,033 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 183 transitions. [2022-11-03 03:59:37,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:59:37,034 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 183 transitions. [2022-11-03 03:59:37,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 03:59:37,038 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:59:37,039 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:59:37,054 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-03 03:59:37,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:59:37,254 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:59:37,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:59:37,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1276738581, now seen corresponding path program 1 times [2022-11-03 03:59:37,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:59:37,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1153877008] [2022-11-03 03:59:37,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:59:37,262 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:59:37,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:59:37,264 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:59:37,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 03:59:37,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:59:37,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 03:59:37,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:59:37,917 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:59:37,920 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:59:37,920 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:59:37,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1153877008] [2022-11-03 03:59:37,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1153877008] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:59:37,921 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:59:37,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:59:37,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236329788] [2022-11-03 03:59:37,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:59:37,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:59:37,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:59:37,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:59:37,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:59:37,932 INFO L87 Difference]: Start difference. First operand 125 states and 183 transitions. Second operand has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:59:38,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:59:38,073 INFO L93 Difference]: Finished difference Result 483 states and 714 transitions. [2022-11-03 03:59:38,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:59:38,074 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2022-11-03 03:59:38,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:59:38,077 INFO L225 Difference]: With dead ends: 483 [2022-11-03 03:59:38,077 INFO L226 Difference]: Without dead ends: 362 [2022-11-03 03:59:38,078 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 121 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 03:59:38,080 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 522 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 522 SdHoareTripleChecker+Valid, 684 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:59:38,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [522 Valid, 684 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:59:38,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2022-11-03 03:59:38,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 127. [2022-11-03 03:59:38,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.4682539682539681) internal successors, (185), 126 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:59:38,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 185 transitions. [2022-11-03 03:59:38,095 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 185 transitions. Word has length 124 [2022-11-03 03:59:38,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:59:38,095 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 185 transitions. [2022-11-03 03:59:38,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:59:38,096 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 185 transitions. [2022-11-03 03:59:38,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 03:59:38,099 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:59:38,100 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:59:38,125 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 03:59:38,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:59:38,319 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:59:38,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:59:38,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1736056429, now seen corresponding path program 1 times [2022-11-03 03:59:38,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:59:38,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [258011721] [2022-11-03 03:59:38,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:59:38,321 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:59:38,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:59:38,329 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:59:38,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 03:59:38,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:59:38,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 03:59:38,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:59:38,987 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:59:38,990 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:59:38,990 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:59:38,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [258011721] [2022-11-03 03:59:38,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [258011721] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:59:38,994 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:59:38,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:59:38,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686323565] [2022-11-03 03:59:38,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:59:38,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:59:38,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:59:38,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:59:39,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:59:39,000 INFO L87 Difference]: Start difference. First operand 127 states and 185 transitions. Second operand has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:59:39,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:59:39,141 INFO L93 Difference]: Finished difference Result 483 states and 713 transitions. [2022-11-03 03:59:39,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:59:39,142 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2022-11-03 03:59:39,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:59:39,145 INFO L225 Difference]: With dead ends: 483 [2022-11-03 03:59:39,145 INFO L226 Difference]: Without dead ends: 362 [2022-11-03 03:59:39,149 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 121 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 03:59:39,153 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 506 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 506 SdHoareTripleChecker+Valid, 683 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:59:39,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [506 Valid, 683 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:59:39,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2022-11-03 03:59:39,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 133. [2022-11-03 03:59:39,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.4621212121212122) internal successors, (193), 132 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:59:39,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 193 transitions. [2022-11-03 03:59:39,170 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 193 transitions. Word has length 124 [2022-11-03 03:59:39,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:59:39,170 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 193 transitions. [2022-11-03 03:59:39,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:59:39,171 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 193 transitions. [2022-11-03 03:59:39,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 03:59:39,174 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:59:39,175 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:59:39,200 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-03 03:59:39,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:59:39,395 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:59:39,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:59:39,395 INFO L85 PathProgramCache]: Analyzing trace with hash -831765905, now seen corresponding path program 1 times [2022-11-03 03:59:39,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:59:39,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1885855665] [2022-11-03 03:59:39,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:59:39,397 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:59:39,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:59:39,401 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:59:39,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-03 03:59:39,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:59:39,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 03:59:39,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:59:39,945 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:59:39,946 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:59:39,946 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:59:39,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1885855665] [2022-11-03 03:59:39,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1885855665] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:59:39,947 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:59:39,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:59:39,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496791864] [2022-11-03 03:59:39,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:59:39,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:59:39,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:59:39,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:59:39,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:59:39,949 INFO L87 Difference]: Start difference. First operand 133 states and 193 transitions. Second operand has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:59:40,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:59:40,011 INFO L93 Difference]: Finished difference Result 483 states and 712 transitions. [2022-11-03 03:59:40,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:59:40,012 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2022-11-03 03:59:40,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:59:40,013 INFO L225 Difference]: With dead ends: 483 [2022-11-03 03:59:40,014 INFO L226 Difference]: Without dead ends: 362 [2022-11-03 03:59:40,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 121 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 03:59:40,015 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 500 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 500 SdHoareTripleChecker+Valid, 700 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:59:40,016 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [500 Valid, 700 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:59:40,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2022-11-03 03:59:40,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 135. [2022-11-03 03:59:40,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.455223880597015) internal successors, (195), 134 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:59:40,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 195 transitions. [2022-11-03 03:59:40,037 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 195 transitions. Word has length 124 [2022-11-03 03:59:40,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:59:40,038 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 195 transitions. [2022-11-03 03:59:40,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:59:40,043 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 195 transitions. [2022-11-03 03:59:40,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 03:59:40,045 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:59:40,046 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:59:40,072 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-03 03:59:40,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:59:40,270 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:59:40,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:59:40,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1815838449, now seen corresponding path program 1 times [2022-11-03 03:59:40,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:59:40,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [833818667] [2022-11-03 03:59:40,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:59:40,272 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:59:40,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:59:40,274 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:59:40,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-03 03:59:40,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:59:40,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:59:40,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:59:40,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:59:40,931 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:59:40,931 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:59:40,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [833818667] [2022-11-03 03:59:40,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [833818667] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:59:40,932 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:59:40,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 03:59:40,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690688782] [2022-11-03 03:59:40,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:59:40,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:59:40,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:59:40,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:59:40,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:59:40,934 INFO L87 Difference]: Start difference. First operand 135 states and 195 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:59:40,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:59:40,983 INFO L93 Difference]: Finished difference Result 268 states and 390 transitions. [2022-11-03 03:59:40,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 03:59:40,985 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2022-11-03 03:59:40,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:59:40,986 INFO L225 Difference]: With dead ends: 268 [2022-11-03 03:59:40,986 INFO L226 Difference]: Without dead ends: 147 [2022-11-03 03:59:40,987 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:59:40,988 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 17 mSDsluCounter, 500 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 672 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:59:40,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 672 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 44 Unchecked, 0.0s Time] [2022-11-03 03:59:40,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-11-03 03:59:40,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2022-11-03 03:59:40,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 1.4383561643835616) internal successors, (210), 146 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:59:40,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 210 transitions. [2022-11-03 03:59:40,995 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 210 transitions. Word has length 124 [2022-11-03 03:59:40,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:59:40,996 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 210 transitions. [2022-11-03 03:59:40,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:59:40,996 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 210 transitions. [2022-11-03 03:59:40,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 03:59:40,998 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:59:40,998 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:59:41,024 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-03 03:59:41,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:59:41,217 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:59:41,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:59:41,218 INFO L85 PathProgramCache]: Analyzing trace with hash -445734801, now seen corresponding path program 1 times [2022-11-03 03:59:41,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:59:41,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [570553099] [2022-11-03 03:59:41,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:59:41,219 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:59:41,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:59:41,220 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:59:41,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-03 03:59:41,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:59:41,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 03:59:41,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:59:41,826 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:59:41,827 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:59:41,827 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:59:41,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [570553099] [2022-11-03 03:59:41,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [570553099] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:59:41,827 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:59:41,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:59:41,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768875765] [2022-11-03 03:59:41,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:59:41,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:59:41,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:59:41,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:59:41,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:59:41,830 INFO L87 Difference]: Start difference. First operand 147 states and 210 transitions. Second operand has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:59:41,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:59:41,926 INFO L93 Difference]: Finished difference Result 495 states and 726 transitions. [2022-11-03 03:59:41,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:59:41,927 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2022-11-03 03:59:41,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:59:41,929 INFO L225 Difference]: With dead ends: 495 [2022-11-03 03:59:41,929 INFO L226 Difference]: Without dead ends: 374 [2022-11-03 03:59:41,930 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 121 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 03:59:41,931 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 474 mSDsluCounter, 491 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 474 SdHoareTripleChecker+Valid, 693 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:59:41,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [474 Valid, 693 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:59:41,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2022-11-03 03:59:41,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 157. [2022-11-03 03:59:41,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.435897435897436) internal successors, (224), 156 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:59:41,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 224 transitions. [2022-11-03 03:59:41,939 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 224 transitions. Word has length 124 [2022-11-03 03:59:41,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:59:41,940 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 224 transitions. [2022-11-03 03:59:41,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:59:41,940 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 224 transitions. [2022-11-03 03:59:41,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 03:59:41,942 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:59:41,942 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:59:41,970 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-03 03:59:42,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:59:42,157 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:59:42,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:59:42,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1752877199, now seen corresponding path program 1 times [2022-11-03 03:59:42,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:59:42,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [18443175] [2022-11-03 03:59:42,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:59:42,159 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:59:42,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:59:42,160 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:59:42,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-03 03:59:42,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:59:42,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-03 03:59:42,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:59:42,825 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:59:42,825 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:59:42,826 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:59:42,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [18443175] [2022-11-03 03:59:42,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [18443175] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:59:42,826 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:59:42,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:59:42,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353472019] [2022-11-03 03:59:42,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:59:42,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:59:42,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:59:42,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:59:42,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:59:42,828 INFO L87 Difference]: Start difference. First operand 157 states and 224 transitions. Second operand has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:59:43,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:59:43,004 INFO L93 Difference]: Finished difference Result 518 states and 757 transitions. [2022-11-03 03:59:43,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:59:43,005 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2022-11-03 03:59:43,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:59:43,007 INFO L225 Difference]: With dead ends: 518 [2022-11-03 03:59:43,007 INFO L226 Difference]: Without dead ends: 397 [2022-11-03 03:59:43,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:59:43,008 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 677 mSDsluCounter, 818 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 677 SdHoareTripleChecker+Valid, 1013 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:59:43,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [677 Valid, 1013 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:59:43,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2022-11-03 03:59:43,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 159. [2022-11-03 03:59:43,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 1.4303797468354431) internal successors, (226), 158 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:59:43,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 226 transitions. [2022-11-03 03:59:43,015 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 226 transitions. Word has length 124 [2022-11-03 03:59:43,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:59:43,015 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 226 transitions. [2022-11-03 03:59:43,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:59:43,016 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 226 transitions. [2022-11-03 03:59:43,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 03:59:43,017 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:59:43,017 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:59:43,041 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-03 03:59:43,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:59:43,238 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:59:43,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:59:43,239 INFO L85 PathProgramCache]: Analyzing trace with hash -721836301, now seen corresponding path program 1 times [2022-11-03 03:59:43,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:59:43,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1788260172] [2022-11-03 03:59:43,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:59:43,240 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:59:43,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:59:43,240 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:59:43,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-03 03:59:43,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:59:43,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 03:59:43,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:59:43,820 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:59:43,820 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:59:43,821 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:59:43,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1788260172] [2022-11-03 03:59:43,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1788260172] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:59:43,821 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:59:43,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:59:43,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374452348] [2022-11-03 03:59:43,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:59:43,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:59:43,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:59:43,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:59:43,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:59:43,823 INFO L87 Difference]: Start difference. First operand 159 states and 226 transitions. Second operand has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:59:43,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:59:43,947 INFO L93 Difference]: Finished difference Result 414 states and 603 transitions. [2022-11-03 03:59:43,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:59:43,948 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2022-11-03 03:59:43,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:59:43,949 INFO L225 Difference]: With dead ends: 414 [2022-11-03 03:59:43,949 INFO L226 Difference]: Without dead ends: 293 [2022-11-03 03:59:43,950 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:59:43,951 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 489 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 489 SdHoareTripleChecker+Valid, 731 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 03:59:43,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [489 Valid, 731 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:59:43,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-11-03 03:59:43,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 173. [2022-11-03 03:59:43,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.430232558139535) internal successors, (246), 172 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 03:59:43,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 246 transitions. [2022-11-03 03:59:43,958 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 246 transitions. Word has length 124 [2022-11-03 03:59:43,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:59:43,958 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 246 transitions. [2022-11-03 03:59:43,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:59:43,959 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 246 transitions. [2022-11-03 03:59:43,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 03:59:43,960 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:59:43,960 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:59:43,981 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2022-11-03 03:59:44,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:59:44,175 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:59:44,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:59:44,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1696648177, now seen corresponding path program 1 times [2022-11-03 03:59:44,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:59:44,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1899692018] [2022-11-03 03:59:44,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:59:44,177 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:59:44,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:59:44,178 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:59:44,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-03 03:59:44,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:59:44,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 03:59:44,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:59:44,810 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:59:44,810 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:59:44,810 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:59:44,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1899692018] [2022-11-03 03:59:44,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1899692018] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:59:44,811 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:59:44,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:59:44,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13564059] [2022-11-03 03:59:44,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:59:44,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:59:44,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:59:44,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:59:44,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:59:44,814 INFO L87 Difference]: Start difference. First operand 173 states and 246 transitions. Second operand has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:59:44,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:59:44,901 INFO L93 Difference]: Finished difference Result 495 states and 723 transitions. [2022-11-03 03:59:44,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:59:44,902 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2022-11-03 03:59:44,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:59:44,903 INFO L225 Difference]: With dead ends: 495 [2022-11-03 03:59:44,904 INFO L226 Difference]: Without dead ends: 374 [2022-11-03 03:59:44,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 121 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 03:59:44,904 INFO L413 NwaCegarLoop]: 238 mSDtfsCounter, 401 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 401 SdHoareTripleChecker+Valid, 681 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:59:44,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [401 Valid, 681 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:59:44,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2022-11-03 03:59:44,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 185. [2022-11-03 03:59:44,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 1.4293478260869565) internal successors, (263), 184 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:59:44,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 263 transitions. [2022-11-03 03:59:44,913 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 263 transitions. Word has length 124 [2022-11-03 03:59:44,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:59:44,913 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 263 transitions. [2022-11-03 03:59:44,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:59:44,914 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 263 transitions. [2022-11-03 03:59:44,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 03:59:44,915 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:59:44,915 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:59:44,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-03 03:59:45,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:59:45,131 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:59:45,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:59:45,131 INFO L85 PathProgramCache]: Analyzing trace with hash -214394381, now seen corresponding path program 1 times [2022-11-03 03:59:45,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:59:45,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [878868777] [2022-11-03 03:59:45,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:59:45,133 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:59:45,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:59:45,134 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:59:45,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-03 03:59:45,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:59:45,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:59:45,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:59:45,932 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:59:45,932 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:59:45,933 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:59:45,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [878868777] [2022-11-03 03:59:45,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [878868777] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:59:45,933 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:59:45,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 03:59:45,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938261605] [2022-11-03 03:59:45,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:59:45,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:59:45,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:59:45,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:59:45,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:59:45,936 INFO L87 Difference]: Start difference. First operand 185 states and 263 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:59:45,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:59:45,992 INFO L93 Difference]: Finished difference Result 338 states and 486 transitions. [2022-11-03 03:59:45,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 03:59:45,993 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2022-11-03 03:59:45,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:59:45,995 INFO L225 Difference]: With dead ends: 338 [2022-11-03 03:59:45,995 INFO L226 Difference]: Without dead ends: 217 [2022-11-03 03:59:45,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:59:45,996 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 51 mSDsluCounter, 755 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 921 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:59:45,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 921 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 68 Unchecked, 0.0s Time] [2022-11-03 03:59:45,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-11-03 03:59:46,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 217. [2022-11-03 03:59:46,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 1.4166666666666667) internal successors, (306), 216 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:59:46,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 306 transitions. [2022-11-03 03:59:46,004 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 306 transitions. Word has length 124 [2022-11-03 03:59:46,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:59:46,004 INFO L495 AbstractCegarLoop]: Abstraction has 217 states and 306 transitions. [2022-11-03 03:59:46,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:59:46,005 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 306 transitions. [2022-11-03 03:59:46,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 03:59:46,006 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:59:46,007 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:59:46,033 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-03 03:59:46,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:59:46,225 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:59:46,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:59:46,226 INFO L85 PathProgramCache]: Analyzing trace with hash 752956273, now seen corresponding path program 1 times [2022-11-03 03:59:46,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:59:46,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1627367632] [2022-11-03 03:59:46,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:59:46,227 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:59:46,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:59:46,229 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:59:46,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-03 03:59:46,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:59:46,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:59:46,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:59:47,134 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:59:47,134 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:59:47,135 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:59:47,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1627367632] [2022-11-03 03:59:47,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1627367632] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:59:47,135 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:59:47,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 03:59:47,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867534236] [2022-11-03 03:59:47,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:59:47,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:59:47,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:59:47,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:59:47,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:59:47,138 INFO L87 Difference]: Start difference. First operand 217 states and 306 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:59:47,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:59:47,204 INFO L93 Difference]: Finished difference Result 356 states and 512 transitions. [2022-11-03 03:59:47,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 03:59:47,205 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2022-11-03 03:59:47,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:59:47,207 INFO L225 Difference]: With dead ends: 356 [2022-11-03 03:59:47,207 INFO L226 Difference]: Without dead ends: 235 [2022-11-03 03:59:47,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:59:47,208 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 93 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 694 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:59:47,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 694 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 47 Unchecked, 0.0s Time] [2022-11-03 03:59:47,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-11-03 03:59:47,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235. [2022-11-03 03:59:47,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 1.4188034188034189) internal successors, (332), 234 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:59:47,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 332 transitions. [2022-11-03 03:59:47,216 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 332 transitions. Word has length 124 [2022-11-03 03:59:47,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:59:47,217 INFO L495 AbstractCegarLoop]: Abstraction has 235 states and 332 transitions. [2022-11-03 03:59:47,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:59:47,217 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 332 transitions. [2022-11-03 03:59:47,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 03:59:47,219 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:59:47,219 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:59:47,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-03 03:59:47,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:59:47,433 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:59:47,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:59:47,434 INFO L85 PathProgramCache]: Analyzing trace with hash 309055599, now seen corresponding path program 1 times [2022-11-03 03:59:47,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:59:47,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [945535253] [2022-11-03 03:59:47,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:59:47,435 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:59:47,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:59:47,437 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:59:47,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-03 03:59:47,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:59:47,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 03:59:47,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:59:48,070 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:59:48,071 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:59:48,071 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:59:48,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [945535253] [2022-11-03 03:59:48,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [945535253] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:59:48,071 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:59:48,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:59:48,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586035805] [2022-11-03 03:59:48,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:59:48,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:59:48,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:59:48,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:59:48,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:59:48,074 INFO L87 Difference]: Start difference. First operand 235 states and 332 transitions. Second operand has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:59:48,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:59:48,192 INFO L93 Difference]: Finished difference Result 568 states and 823 transitions. [2022-11-03 03:59:48,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:59:48,193 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2022-11-03 03:59:48,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:59:48,195 INFO L225 Difference]: With dead ends: 568 [2022-11-03 03:59:48,195 INFO L226 Difference]: Without dead ends: 447 [2022-11-03 03:59:48,196 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:59:48,197 INFO L413 NwaCegarLoop]: 284 mSDtfsCounter, 531 mSDsluCounter, 670 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 531 SdHoareTripleChecker+Valid, 954 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:59:48,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [531 Valid, 954 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:59:48,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2022-11-03 03:59:48,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 265. [2022-11-03 03:59:48,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 1.4242424242424243) internal successors, (376), 264 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:59:48,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 376 transitions. [2022-11-03 03:59:48,207 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 376 transitions. Word has length 124 [2022-11-03 03:59:48,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:59:48,207 INFO L495 AbstractCegarLoop]: Abstraction has 265 states and 376 transitions. [2022-11-03 03:59:48,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:59:48,208 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 376 transitions. [2022-11-03 03:59:48,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 03:59:48,209 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:59:48,209 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:59:48,234 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-03 03:59:48,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:59:48,427 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:59:48,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:59:48,428 INFO L85 PathProgramCache]: Analyzing trace with hash -588337679, now seen corresponding path program 1 times [2022-11-03 03:59:48,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:59:48,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1023381039] [2022-11-03 03:59:48,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:59:48,429 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:59:48,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:59:48,430 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:59:48,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-03 03:59:48,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:59:48,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-03 03:59:48,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:59:49,202 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:59:49,202 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:59:49,202 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:59:49,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1023381039] [2022-11-03 03:59:49,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1023381039] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:59:49,203 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:59:49,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:59:49,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544967521] [2022-11-03 03:59:49,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:59:49,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:59:49,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:59:49,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:59:49,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:59:49,205 INFO L87 Difference]: Start difference. First operand 265 states and 376 transitions. Second operand has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:59:49,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:59:49,378 INFO L93 Difference]: Finished difference Result 568 states and 822 transitions. [2022-11-03 03:59:49,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:59:49,381 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2022-11-03 03:59:49,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:59:49,383 INFO L225 Difference]: With dead ends: 568 [2022-11-03 03:59:49,383 INFO L226 Difference]: Without dead ends: 447 [2022-11-03 03:59:49,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:59:49,384 INFO L413 NwaCegarLoop]: 278 mSDtfsCounter, 524 mSDsluCounter, 644 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 524 SdHoareTripleChecker+Valid, 922 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:59:49,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [524 Valid, 922 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:59:49,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2022-11-03 03:59:49,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 267. [2022-11-03 03:59:49,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 1.4210526315789473) internal successors, (378), 266 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:59:49,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 378 transitions. [2022-11-03 03:59:49,402 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 378 transitions. Word has length 124 [2022-11-03 03:59:49,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:59:49,402 INFO L495 AbstractCegarLoop]: Abstraction has 267 states and 378 transitions. [2022-11-03 03:59:49,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:59:49,403 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 378 transitions. [2022-11-03 03:59:49,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 03:59:49,404 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:59:49,405 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:59:49,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-03 03:59:49,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:59:49,623 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:59:49,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:59:49,624 INFO L85 PathProgramCache]: Analyzing trace with hash -164690957, now seen corresponding path program 1 times [2022-11-03 03:59:49,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:59:49,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [944162946] [2022-11-03 03:59:49,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:59:49,625 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:59:49,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:59:49,627 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:59:49,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-03 03:59:50,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:59:50,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 03:59:50,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:59:50,388 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:59:50,389 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:59:50,389 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:59:50,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [944162946] [2022-11-03 03:59:50,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [944162946] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:59:50,389 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:59:50,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:59:50,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997466100] [2022-11-03 03:59:50,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:59:50,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:59:50,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:59:50,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:59:50,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:59:50,392 INFO L87 Difference]: Start difference. First operand 267 states and 378 transitions. Second operand has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:59:50,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:59:50,633 INFO L93 Difference]: Finished difference Result 510 states and 737 transitions. [2022-11-03 03:59:50,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:59:50,634 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2022-11-03 03:59:50,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:59:50,636 INFO L225 Difference]: With dead ends: 510 [2022-11-03 03:59:50,636 INFO L226 Difference]: Without dead ends: 389 [2022-11-03 03:59:50,637 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:59:50,638 INFO L413 NwaCegarLoop]: 273 mSDtfsCounter, 433 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 433 SdHoareTripleChecker+Valid, 768 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:59:50,638 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [433 Valid, 768 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:59:50,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2022-11-03 03:59:50,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 269. [2022-11-03 03:59:50,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 1.4179104477611941) internal successors, (380), 268 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:59:50,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 380 transitions. [2022-11-03 03:59:50,647 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 380 transitions. Word has length 124 [2022-11-03 03:59:50,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:59:50,647 INFO L495 AbstractCegarLoop]: Abstraction has 269 states and 380 transitions. [2022-11-03 03:59:50,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:59:50,648 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 380 transitions. [2022-11-03 03:59:50,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 03:59:50,650 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:59:50,650 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:59:50,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-03 03:59:50,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:59:50,863 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:59:50,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:59:50,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1680676209, now seen corresponding path program 1 times [2022-11-03 03:59:50,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:59:50,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1678998930] [2022-11-03 03:59:50,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:59:50,865 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:59:50,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:59:50,866 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:59:50,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-03 03:59:51,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:59:51,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:59:51,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:59:51,854 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:59:51,854 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:59:51,855 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:59:51,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1678998930] [2022-11-03 03:59:51,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1678998930] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:59:51,855 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:59:51,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 03:59:51,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437700211] [2022-11-03 03:59:51,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:59:51,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:59:51,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:59:51,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:59:51,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:59:51,861 INFO L87 Difference]: Start difference. First operand 269 states and 380 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:59:51,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:59:51,918 INFO L93 Difference]: Finished difference Result 422 states and 604 transitions. [2022-11-03 03:59:51,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 03:59:51,919 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2022-11-03 03:59:51,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:59:51,921 INFO L225 Difference]: With dead ends: 422 [2022-11-03 03:59:51,921 INFO L226 Difference]: Without dead ends: 301 [2022-11-03 03:59:51,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:59:51,924 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 106 mSDsluCounter, 726 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 877 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:59:51,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 877 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 56 Unchecked, 0.0s Time] [2022-11-03 03:59:51,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2022-11-03 03:59:51,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 301. [2022-11-03 03:59:51,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 1.4133333333333333) internal successors, (424), 300 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:59:51,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 424 transitions. [2022-11-03 03:59:51,935 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 424 transitions. Word has length 124 [2022-11-03 03:59:51,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:59:51,936 INFO L495 AbstractCegarLoop]: Abstraction has 301 states and 424 transitions. [2022-11-03 03:59:51,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:59:51,936 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 424 transitions. [2022-11-03 03:59:51,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 03:59:51,938 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:59:51,938 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:59:51,957 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-03 03:59:52,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:59:52,157 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:59:52,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:59:52,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1257974383, now seen corresponding path program 1 times [2022-11-03 03:59:52,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:59:52,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [79284983] [2022-11-03 03:59:52,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:59:52,159 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:59:52,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:59:52,163 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:59:52,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-03 03:59:52,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:59:52,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:59:52,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:59:53,229 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:59:53,229 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:59:53,230 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:59:53,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [79284983] [2022-11-03 03:59:53,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [79284983] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:59:53,230 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:59:53,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 03:59:53,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879597099] [2022-11-03 03:59:53,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:59:53,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:59:53,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:59:53,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:59:53,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:59:53,233 INFO L87 Difference]: Start difference. First operand 301 states and 424 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:59:53,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:59:53,291 INFO L93 Difference]: Finished difference Result 436 states and 624 transitions. [2022-11-03 03:59:53,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 03:59:53,293 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2022-11-03 03:59:53,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:59:53,294 INFO L225 Difference]: With dead ends: 436 [2022-11-03 03:59:53,295 INFO L226 Difference]: Without dead ends: 315 [2022-11-03 03:59:53,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:59:53,296 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 121 mSDsluCounter, 716 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 862 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:59:53,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 862 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 54 Unchecked, 0.0s Time] [2022-11-03 03:59:53,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2022-11-03 03:59:53,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 315. [2022-11-03 03:59:53,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 1.414012738853503) internal successors, (444), 314 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:59:53,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 444 transitions. [2022-11-03 03:59:53,305 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 444 transitions. Word has length 124 [2022-11-03 03:59:53,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:59:53,306 INFO L495 AbstractCegarLoop]: Abstraction has 315 states and 444 transitions. [2022-11-03 03:59:53,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:59:53,306 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 444 transitions. [2022-11-03 03:59:53,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 03:59:53,308 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:59:53,308 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:59:53,333 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-03 03:59:53,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:59:53,527 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:59:53,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:59:53,527 INFO L85 PathProgramCache]: Analyzing trace with hash -517032979, now seen corresponding path program 1 times [2022-11-03 03:59:53,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:59:53,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [437328366] [2022-11-03 03:59:53,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:59:53,529 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:59:53,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:59:53,530 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:59:53,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-03 03:59:53,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:59:53,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-03 03:59:53,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:59:56,872 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:59:56,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:59:59,799 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:59:59,799 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:59:59,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [437328366] [2022-11-03 03:59:59,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [437328366] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:59:59,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1687522133] [2022-11-03 03:59:59,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:59:59,801 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:59:59,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:59:59,804 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:59:59,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2022-11-03 04:00:00,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:00,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-03 04:00:00,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:00:02,732 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:00:02,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:00:03,633 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:00:03,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1687522133] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:00:03,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540995115] [2022-11-03 04:00:03,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:03,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:00:03,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:00:03,639 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:00:03,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-03 04:00:03,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:03,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-03 04:00:03,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:00:06,178 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:00:06,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:00:07,233 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:00:07,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540995115] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:00:07,234 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:00:07,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22, 22, 23, 23] total 44 [2022-11-03 04:00:07,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111739234] [2022-11-03 04:00:07,235 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:00:07,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-03 04:00:07,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:00:07,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-03 04:00:07,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=1646, Unknown=0, NotChecked=0, Total=1892 [2022-11-03 04:00:07,238 INFO L87 Difference]: Start difference. First operand 315 states and 444 transitions. Second operand has 44 states, 44 states have (on average 5.681818181818182) internal successors, (250), 44 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 04:00:26,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:00:26,378 INFO L93 Difference]: Finished difference Result 2757 states and 4047 transitions. [2022-11-03 04:00:26,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2022-11-03 04:00:26,379 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 5.681818181818182) internal successors, (250), 44 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) Word has length 124 [2022-11-03 04:00:26,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:00:26,441 INFO L225 Difference]: With dead ends: 2757 [2022-11-03 04:00:26,444 INFO L226 Difference]: Without dead ends: 2755 [2022-11-03 04:00:26,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 891 GetRequests, 718 SyntacticMatches, 21 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7380 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=4438, Invalid=19124, Unknown=0, NotChecked=0, Total=23562 [2022-11-03 04:00:26,453 INFO L413 NwaCegarLoop]: 799 mSDtfsCounter, 10083 mSDsluCounter, 13036 mSDsCounter, 0 mSdLazyCounter, 3260 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10083 SdHoareTripleChecker+Valid, 13835 SdHoareTripleChecker+Invalid, 10861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 3260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7480 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-11-03 04:00:26,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10083 Valid, 13835 Invalid, 10861 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [121 Valid, 3260 Invalid, 0 Unknown, 7480 Unchecked, 4.4s Time] [2022-11-03 04:00:26,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2755 states. [2022-11-03 04:00:26,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2755 to 981. [2022-11-03 04:00:26,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 981 states, 980 states have (on average 1.4479591836734693) internal successors, (1419), 980 states have internal predecessors, (1419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:26,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 981 states to 981 states and 1419 transitions. [2022-11-03 04:00:26,506 INFO L78 Accepts]: Start accepts. Automaton has 981 states and 1419 transitions. Word has length 124 [2022-11-03 04:00:26,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:00:26,507 INFO L495 AbstractCegarLoop]: Abstraction has 981 states and 1419 transitions. [2022-11-03 04:00:26,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 5.681818181818182) internal successors, (250), 44 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 04:00:26,507 INFO L276 IsEmpty]: Start isEmpty. Operand 981 states and 1419 transitions. [2022-11-03 04:00:26,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 04:00:26,510 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:00:26,510 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:00:26,522 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (19)] Ended with exit code 0 [2022-11-03 04:00:26,743 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-03 04:00:26,929 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-03 04:00:27,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:00:27,117 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:00:27,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:00:27,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1837352303, now seen corresponding path program 1 times [2022-11-03 04:00:27,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:00:27,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1007538470] [2022-11-03 04:00:27,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:27,119 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:00:27,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:00:27,120 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:00:27,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-03 04:00:27,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:27,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 04:00:27,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:00:27,703 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:00:27,703 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:00:27,703 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:00:27,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1007538470] [2022-11-03 04:00:27,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1007538470] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:00:27,704 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:00:27,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 04:00:27,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43822537] [2022-11-03 04:00:27,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:00:27,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 04:00:27,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:00:27,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 04:00:27,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:00:27,706 INFO L87 Difference]: Start difference. First operand 981 states and 1419 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:27,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:00:27,754 INFO L93 Difference]: Finished difference Result 1746 states and 2543 transitions. [2022-11-03 04:00:27,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 04:00:27,755 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2022-11-03 04:00:27,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:00:27,759 INFO L225 Difference]: With dead ends: 1746 [2022-11-03 04:00:27,760 INFO L226 Difference]: Without dead ends: 981 [2022-11-03 04:00:27,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:00:27,762 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 33 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 680 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:00:27,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 680 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 45 Unchecked, 0.0s Time] [2022-11-03 04:00:27,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 981 states. [2022-11-03 04:00:27,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 981 to 981. [2022-11-03 04:00:27,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 981 states, 980 states have (on average 1.4448979591836735) internal successors, (1416), 980 states have internal predecessors, (1416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:27,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 981 states to 981 states and 1416 transitions. [2022-11-03 04:00:27,787 INFO L78 Accepts]: Start accepts. Automaton has 981 states and 1416 transitions. Word has length 124 [2022-11-03 04:00:27,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:00:27,787 INFO L495 AbstractCegarLoop]: Abstraction has 981 states and 1416 transitions. [2022-11-03 04:00:27,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:27,788 INFO L276 IsEmpty]: Start isEmpty. Operand 981 states and 1416 transitions. [2022-11-03 04:00:27,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 04:00:27,790 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:00:27,790 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:00:27,813 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-03 04:00:28,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:00:28,005 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:00:28,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:00:28,006 INFO L85 PathProgramCache]: Analyzing trace with hash 834352239, now seen corresponding path program 1 times [2022-11-03 04:00:28,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:00:28,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [747015974] [2022-11-03 04:00:28,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:28,007 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:00:28,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:00:28,009 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:00:28,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-03 04:00:28,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:28,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 04:00:28,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:00:28,576 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:00:28,577 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:00:28,577 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:00:28,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [747015974] [2022-11-03 04:00:28,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [747015974] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:00:28,578 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:00:28,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 04:00:28,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385250757] [2022-11-03 04:00:28,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:00:28,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 04:00:28,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:00:28,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 04:00:28,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:00:28,581 INFO L87 Difference]: Start difference. First operand 981 states and 1416 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:28,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:00:28,630 INFO L93 Difference]: Finished difference Result 1666 states and 2428 transitions. [2022-11-03 04:00:28,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 04:00:28,631 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2022-11-03 04:00:28,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:00:28,635 INFO L225 Difference]: With dead ends: 1666 [2022-11-03 04:00:28,635 INFO L226 Difference]: Without dead ends: 893 [2022-11-03 04:00:28,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:00:28,639 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 26 mSDsluCounter, 626 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 797 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:00:28,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 797 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 44 Unchecked, 0.0s Time] [2022-11-03 04:00:28,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2022-11-03 04:00:28,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 893. [2022-11-03 04:00:28,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 1.4484304932735426) internal successors, (1292), 892 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:28,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 1292 transitions. [2022-11-03 04:00:28,674 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 1292 transitions. Word has length 124 [2022-11-03 04:00:28,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:00:28,674 INFO L495 AbstractCegarLoop]: Abstraction has 893 states and 1292 transitions. [2022-11-03 04:00:28,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:28,674 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 1292 transitions. [2022-11-03 04:00:28,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 04:00:28,676 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:00:28,677 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:00:28,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-03 04:00:28,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:00:28,895 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:00:28,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:00:28,895 INFO L85 PathProgramCache]: Analyzing trace with hash -398591505, now seen corresponding path program 1 times [2022-11-03 04:00:28,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:00:28,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1877392504] [2022-11-03 04:00:28,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:28,896 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:00:28,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:00:28,898 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:00:28,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-03 04:00:29,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:29,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 04:00:29,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:00:29,364 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:00:29,365 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:00:29,365 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:00:29,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1877392504] [2022-11-03 04:00:29,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1877392504] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:00:29,365 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:00:29,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 04:00:29,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104877463] [2022-11-03 04:00:29,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:00:29,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 04:00:29,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:00:29,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 04:00:29,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:00:29,367 INFO L87 Difference]: Start difference. First operand 893 states and 1292 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:29,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:00:29,416 INFO L93 Difference]: Finished difference Result 1112 states and 1604 transitions. [2022-11-03 04:00:29,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 04:00:29,418 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2022-11-03 04:00:29,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:00:29,421 INFO L225 Difference]: With dead ends: 1112 [2022-11-03 04:00:29,421 INFO L226 Difference]: Without dead ends: 893 [2022-11-03 04:00:29,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:00:29,423 INFO L413 NwaCegarLoop]: 173 mSDtfsCounter, 14 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 674 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:00:29,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 674 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 44 Unchecked, 0.0s Time] [2022-11-03 04:00:29,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2022-11-03 04:00:29,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 893. [2022-11-03 04:00:29,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 1.446188340807175) internal successors, (1290), 892 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:29,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 1290 transitions. [2022-11-03 04:00:29,447 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 1290 transitions. Word has length 124 [2022-11-03 04:00:29,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:00:29,447 INFO L495 AbstractCegarLoop]: Abstraction has 893 states and 1290 transitions. [2022-11-03 04:00:29,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:29,448 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 1290 transitions. [2022-11-03 04:00:29,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 04:00:29,450 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:00:29,450 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:00:29,473 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-03 04:00:29,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:00:29,661 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:00:29,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:00:29,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1555617553, now seen corresponding path program 1 times [2022-11-03 04:00:29,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:00:29,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [846504249] [2022-11-03 04:00:29,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:29,663 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:00:29,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:00:29,664 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:00:29,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-03 04:00:30,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:30,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 04:00:30,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:00:30,157 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:00:30,158 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:00:30,158 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:00:30,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [846504249] [2022-11-03 04:00:30,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [846504249] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:00:30,159 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:00:30,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 04:00:30,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838460309] [2022-11-03 04:00:30,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:00:30,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 04:00:30,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:00:30,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 04:00:30,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:00:30,161 INFO L87 Difference]: Start difference. First operand 893 states and 1290 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:30,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:00:30,218 INFO L93 Difference]: Finished difference Result 1014 states and 1469 transitions. [2022-11-03 04:00:30,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 04:00:30,219 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2022-11-03 04:00:30,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:00:30,222 INFO L225 Difference]: With dead ends: 1014 [2022-11-03 04:00:30,223 INFO L226 Difference]: Without dead ends: 791 [2022-11-03 04:00:30,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:00:30,224 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 7 mSDsluCounter, 497 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 671 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:00:30,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 671 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 43 Unchecked, 0.0s Time] [2022-11-03 04:00:30,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2022-11-03 04:00:30,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 791. [2022-11-03 04:00:30,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 791 states, 790 states have (on average 1.4569620253164557) internal successors, (1151), 790 states have internal predecessors, (1151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:30,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 1151 transitions. [2022-11-03 04:00:30,248 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 1151 transitions. Word has length 124 [2022-11-03 04:00:30,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:00:30,248 INFO L495 AbstractCegarLoop]: Abstraction has 791 states and 1151 transitions. [2022-11-03 04:00:30,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:30,249 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 1151 transitions. [2022-11-03 04:00:30,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 04:00:30,251 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:00:30,251 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:00:30,277 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-03 04:00:30,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:00:30,469 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:00:30,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:00:30,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1052764409, now seen corresponding path program 1 times [2022-11-03 04:00:30,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:00:30,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1205561151] [2022-11-03 04:00:30,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:30,471 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:00:30,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:00:30,472 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:00:30,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-03 04:00:30,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:30,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 04:00:30,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:00:30,899 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:00:30,899 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:00:30,899 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:00:30,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1205561151] [2022-11-03 04:00:30,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1205561151] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:00:30,900 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:00:30,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 04:00:30,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409550030] [2022-11-03 04:00:30,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:00:30,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 04:00:30,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:00:30,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 04:00:30,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:00:30,902 INFO L87 Difference]: Start difference. First operand 791 states and 1151 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:31,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:00:31,080 INFO L93 Difference]: Finished difference Result 1712 states and 2515 transitions. [2022-11-03 04:00:31,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 04:00:31,080 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2022-11-03 04:00:31,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:00:31,084 INFO L225 Difference]: With dead ends: 1712 [2022-11-03 04:00:31,085 INFO L226 Difference]: Without dead ends: 1045 [2022-11-03 04:00:31,086 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 04:00:31,087 INFO L413 NwaCegarLoop]: 301 mSDtfsCounter, 624 mSDsluCounter, 872 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 624 SdHoareTripleChecker+Valid, 1173 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:00:31,087 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [624 Valid, 1173 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 82 Invalid, 0 Unknown, 99 Unchecked, 0.1s Time] [2022-11-03 04:00:31,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1045 states. [2022-11-03 04:00:31,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1045 to 791. [2022-11-03 04:00:31,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 791 states, 790 states have (on average 1.4556962025316456) internal successors, (1150), 790 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:31,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 1150 transitions. [2022-11-03 04:00:31,109 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 1150 transitions. Word has length 124 [2022-11-03 04:00:31,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:00:31,110 INFO L495 AbstractCegarLoop]: Abstraction has 791 states and 1150 transitions. [2022-11-03 04:00:31,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:31,110 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 1150 transitions. [2022-11-03 04:00:31,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 04:00:31,112 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:00:31,113 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:00:31,131 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-11-03 04:00:31,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:00:31,330 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:00:31,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:00:31,331 INFO L85 PathProgramCache]: Analyzing trace with hash 14179835, now seen corresponding path program 1 times [2022-11-03 04:00:31,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:00:31,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [890267283] [2022-11-03 04:00:31,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:31,333 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:00:31,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:00:31,334 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:00:31,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-03 04:00:31,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:31,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 04:00:31,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:00:31,790 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:00:31,791 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:00:31,791 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:00:31,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [890267283] [2022-11-03 04:00:31,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [890267283] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:00:31,792 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:00:31,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 04:00:31,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930863942] [2022-11-03 04:00:31,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:00:31,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 04:00:31,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:00:31,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 04:00:31,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:00:31,794 INFO L87 Difference]: Start difference. First operand 791 states and 1150 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:31,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:00:31,890 INFO L93 Difference]: Finished difference Result 1664 states and 2443 transitions. [2022-11-03 04:00:31,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 04:00:31,891 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2022-11-03 04:00:31,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:00:31,895 INFO L225 Difference]: With dead ends: 1664 [2022-11-03 04:00:31,895 INFO L226 Difference]: Without dead ends: 1001 [2022-11-03 04:00:31,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 04:00:31,897 INFO L413 NwaCegarLoop]: 327 mSDtfsCounter, 174 mSDsluCounter, 1028 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 1355 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 130 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:00:31,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 1355 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 130 Unchecked, 0.1s Time] [2022-11-03 04:00:31,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1001 states. [2022-11-03 04:00:31,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1001 to 791. [2022-11-03 04:00:31,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 791 states, 790 states have (on average 1.4544303797468354) internal successors, (1149), 790 states have internal predecessors, (1149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:31,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 1149 transitions. [2022-11-03 04:00:31,920 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 1149 transitions. Word has length 124 [2022-11-03 04:00:31,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:00:31,921 INFO L495 AbstractCegarLoop]: Abstraction has 791 states and 1149 transitions. [2022-11-03 04:00:31,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:31,921 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 1149 transitions. [2022-11-03 04:00:31,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 04:00:31,923 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:00:31,923 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:00:31,949 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-11-03 04:00:32,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:00:32,146 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:00:32,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:00:32,146 INFO L85 PathProgramCache]: Analyzing trace with hash 132621309, now seen corresponding path program 1 times [2022-11-03 04:00:32,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:00:32,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1801304724] [2022-11-03 04:00:32,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:32,147 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:00:32,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:00:32,148 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:00:32,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-03 04:00:32,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:32,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 04:00:32,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:00:32,599 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:00:32,599 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:00:32,599 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:00:32,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1801304724] [2022-11-03 04:00:32,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1801304724] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:00:32,600 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:00:32,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 04:00:32,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152772491] [2022-11-03 04:00:32,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:00:32,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 04:00:32,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:00:32,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 04:00:32,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:00:32,602 INFO L87 Difference]: Start difference. First operand 791 states and 1149 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:32,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:00:32,721 INFO L93 Difference]: Finished difference Result 1814 states and 2667 transitions. [2022-11-03 04:00:32,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 04:00:32,722 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2022-11-03 04:00:32,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:00:32,726 INFO L225 Difference]: With dead ends: 1814 [2022-11-03 04:00:32,727 INFO L226 Difference]: Without dead ends: 1161 [2022-11-03 04:00:32,728 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 04:00:32,729 INFO L413 NwaCegarLoop]: 322 mSDtfsCounter, 182 mSDsluCounter, 1017 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 1339 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 129 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:00:32,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 1339 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 129 Unchecked, 0.1s Time] [2022-11-03 04:00:32,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1161 states. [2022-11-03 04:00:32,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1161 to 791. [2022-11-03 04:00:32,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 791 states, 790 states have (on average 1.4531645569620253) internal successors, (1148), 790 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:32,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 1148 transitions. [2022-11-03 04:00:32,755 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 1148 transitions. Word has length 124 [2022-11-03 04:00:32,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:00:32,756 INFO L495 AbstractCegarLoop]: Abstraction has 791 states and 1148 transitions. [2022-11-03 04:00:32,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:32,756 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 1148 transitions. [2022-11-03 04:00:32,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 04:00:32,758 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:00:32,758 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:00:32,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-11-03 04:00:32,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:00:32,972 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:00:32,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:00:32,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1484006527, now seen corresponding path program 1 times [2022-11-03 04:00:32,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:00:32,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [775327936] [2022-11-03 04:00:32,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:32,973 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:00:32,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:00:32,974 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:00:32,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-03 04:00:33,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:33,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 04:00:33,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:00:33,442 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:00:33,443 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:00:33,443 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:00:33,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [775327936] [2022-11-03 04:00:33,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [775327936] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:00:33,444 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:00:33,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 04:00:33,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278863116] [2022-11-03 04:00:33,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:00:33,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 04:00:33,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:00:33,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 04:00:33,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:00:33,447 INFO L87 Difference]: Start difference. First operand 791 states and 1148 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:33,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:00:33,678 INFO L93 Difference]: Finished difference Result 1838 states and 2701 transitions. [2022-11-03 04:00:33,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 04:00:33,679 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2022-11-03 04:00:33,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:00:33,683 INFO L225 Difference]: With dead ends: 1838 [2022-11-03 04:00:33,683 INFO L226 Difference]: Without dead ends: 1189 [2022-11-03 04:00:33,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 04:00:33,685 INFO L413 NwaCegarLoop]: 296 mSDtfsCounter, 413 mSDsluCounter, 1239 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 413 SdHoareTripleChecker+Valid, 1535 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:00:33,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [413 Valid, 1535 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 143 Invalid, 0 Unknown, 101 Unchecked, 0.2s Time] [2022-11-03 04:00:33,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1189 states. [2022-11-03 04:00:33,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1189 to 791. [2022-11-03 04:00:33,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 791 states, 790 states have (on average 1.4518987341772152) internal successors, (1147), 790 states have internal predecessors, (1147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:33,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 1147 transitions. [2022-11-03 04:00:33,724 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 1147 transitions. Word has length 124 [2022-11-03 04:00:33,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:00:33,724 INFO L495 AbstractCegarLoop]: Abstraction has 791 states and 1147 transitions. [2022-11-03 04:00:33,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:33,725 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 1147 transitions. [2022-11-03 04:00:33,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 04:00:33,726 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:00:33,726 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:00:33,745 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-11-03 04:00:33,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:00:33,945 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:00:33,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:00:33,946 INFO L85 PathProgramCache]: Analyzing trace with hash -456575487, now seen corresponding path program 1 times [2022-11-03 04:00:33,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:00:33,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [795879107] [2022-11-03 04:00:33,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:33,947 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:00:33,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:00:33,948 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:00:33,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-03 04:00:34,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:34,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 04:00:34,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:00:34,392 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:00:34,392 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:00:34,392 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:00:34,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [795879107] [2022-11-03 04:00:34,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [795879107] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:00:34,392 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:00:34,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 04:00:34,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267702671] [2022-11-03 04:00:34,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:00:34,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 04:00:34,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:00:34,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 04:00:34,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:00:34,394 INFO L87 Difference]: Start difference. First operand 791 states and 1147 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:34,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:00:34,607 INFO L93 Difference]: Finished difference Result 1998 states and 2929 transitions. [2022-11-03 04:00:34,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 04:00:34,608 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2022-11-03 04:00:34,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:00:34,611 INFO L225 Difference]: With dead ends: 1998 [2022-11-03 04:00:34,612 INFO L226 Difference]: Without dead ends: 1351 [2022-11-03 04:00:34,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 04:00:34,614 INFO L413 NwaCegarLoop]: 414 mSDtfsCounter, 285 mSDsluCounter, 1210 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 1624 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:00:34,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 1624 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 148 Invalid, 0 Unknown, 38 Unchecked, 0.2s Time] [2022-11-03 04:00:34,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1351 states. [2022-11-03 04:00:34,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1351 to 791. [2022-11-03 04:00:34,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 791 states, 790 states have (on average 1.450632911392405) internal successors, (1146), 790 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:34,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 1146 transitions. [2022-11-03 04:00:34,643 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 1146 transitions. Word has length 124 [2022-11-03 04:00:34,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:00:34,643 INFO L495 AbstractCegarLoop]: Abstraction has 791 states and 1146 transitions. [2022-11-03 04:00:34,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:34,644 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 1146 transitions. [2022-11-03 04:00:34,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 04:00:34,645 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:00:34,645 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:00:34,664 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-11-03 04:00:34,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:00:34,864 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:00:34,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:00:34,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1227309053, now seen corresponding path program 1 times [2022-11-03 04:00:34,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:00:34,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [514898146] [2022-11-03 04:00:34,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:34,865 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:00:34,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:00:34,866 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:00:34,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-11-03 04:00:35,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:35,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 04:00:35,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:00:35,337 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:00:35,338 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:00:35,338 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:00:35,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [514898146] [2022-11-03 04:00:35,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [514898146] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:00:35,338 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:00:35,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 04:00:35,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851143784] [2022-11-03 04:00:35,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:00:35,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 04:00:35,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:00:35,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 04:00:35,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:00:35,341 INFO L87 Difference]: Start difference. First operand 791 states and 1146 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:35,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:00:35,451 INFO L93 Difference]: Finished difference Result 1906 states and 2793 transitions. [2022-11-03 04:00:35,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 04:00:35,452 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2022-11-03 04:00:35,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:00:35,456 INFO L225 Difference]: With dead ends: 1906 [2022-11-03 04:00:35,457 INFO L226 Difference]: Without dead ends: 1267 [2022-11-03 04:00:35,458 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:00:35,459 INFO L413 NwaCegarLoop]: 316 mSDtfsCounter, 160 mSDsluCounter, 1001 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 1317 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:00:35,459 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 1317 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 47 Unchecked, 0.1s Time] [2022-11-03 04:00:35,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2022-11-03 04:00:35,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 791. [2022-11-03 04:00:35,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 791 states, 790 states have (on average 1.4493670886075949) internal successors, (1145), 790 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:35,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 1145 transitions. [2022-11-03 04:00:35,485 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 1145 transitions. Word has length 124 [2022-11-03 04:00:35,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:00:35,486 INFO L495 AbstractCegarLoop]: Abstraction has 791 states and 1145 transitions. [2022-11-03 04:00:35,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:35,486 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 1145 transitions. [2022-11-03 04:00:35,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 04:00:35,487 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:00:35,487 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:00:35,512 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-11-03 04:00:35,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:00:35,701 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:00:35,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:00:35,701 INFO L85 PathProgramCache]: Analyzing trace with hash 2009820165, now seen corresponding path program 1 times [2022-11-03 04:00:35,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:00:35,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1983754901] [2022-11-03 04:00:35,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:35,702 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:00:35,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:00:35,704 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:00:35,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-11-03 04:00:36,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:36,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 04:00:36,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:00:36,189 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:00:36,189 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:00:36,189 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:00:36,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1983754901] [2022-11-03 04:00:36,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1983754901] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:00:36,189 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:00:36,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 04:00:36,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544285312] [2022-11-03 04:00:36,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:00:36,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 04:00:36,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:00:36,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 04:00:36,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:00:36,191 INFO L87 Difference]: Start difference. First operand 791 states and 1145 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:36,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:00:36,415 INFO L93 Difference]: Finished difference Result 1900 states and 2782 transitions. [2022-11-03 04:00:36,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 04:00:36,416 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2022-11-03 04:00:36,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:00:36,419 INFO L225 Difference]: With dead ends: 1900 [2022-11-03 04:00:36,419 INFO L226 Difference]: Without dead ends: 1267 [2022-11-03 04:00:36,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 04:00:36,420 INFO L413 NwaCegarLoop]: 391 mSDtfsCounter, 260 mSDsluCounter, 1376 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 1767 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:00:36,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [260 Valid, 1767 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 147 Invalid, 0 Unknown, 70 Unchecked, 0.2s Time] [2022-11-03 04:00:36,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2022-11-03 04:00:36,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 791. [2022-11-03 04:00:36,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 791 states, 790 states have (on average 1.4481012658227848) internal successors, (1144), 790 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:36,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 1144 transitions. [2022-11-03 04:00:36,447 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 1144 transitions. Word has length 124 [2022-11-03 04:00:36,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:00:36,448 INFO L495 AbstractCegarLoop]: Abstraction has 791 states and 1144 transitions. [2022-11-03 04:00:36,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:36,448 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 1144 transitions. [2022-11-03 04:00:36,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 04:00:36,449 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:00:36,450 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:00:36,472 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (31)] Ended with exit code 0 [2022-11-03 04:00:36,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:00:36,667 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:00:36,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:00:36,667 INFO L85 PathProgramCache]: Analyzing trace with hash -551042681, now seen corresponding path program 1 times [2022-11-03 04:00:36,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:00:36,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1640961691] [2022-11-03 04:00:36,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:36,669 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:00:36,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:00:36,670 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:00:36,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-11-03 04:00:36,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:37,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 04:00:37,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:00:37,155 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:00:37,155 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:00:37,155 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:00:37,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1640961691] [2022-11-03 04:00:37,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1640961691] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:00:37,155 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:00:37,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 04:00:37,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284995651] [2022-11-03 04:00:37,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:00:37,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 04:00:37,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:00:37,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 04:00:37,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:00:37,157 INFO L87 Difference]: Start difference. First operand 791 states and 1144 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:37,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:00:37,370 INFO L93 Difference]: Finished difference Result 1858 states and 2721 transitions. [2022-11-03 04:00:37,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 04:00:37,371 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2022-11-03 04:00:37,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:00:37,374 INFO L225 Difference]: With dead ends: 1858 [2022-11-03 04:00:37,374 INFO L226 Difference]: Without dead ends: 1231 [2022-11-03 04:00:37,375 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 04:00:37,376 INFO L413 NwaCegarLoop]: 382 mSDtfsCounter, 256 mSDsluCounter, 1145 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 1527 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 90 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:00:37,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [256 Valid, 1527 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 146 Invalid, 0 Unknown, 90 Unchecked, 0.2s Time] [2022-11-03 04:00:37,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1231 states. [2022-11-03 04:00:37,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1231 to 791. [2022-11-03 04:00:37,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 791 states, 790 states have (on average 1.4468354430379746) internal successors, (1143), 790 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:37,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 1143 transitions. [2022-11-03 04:00:37,403 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 1143 transitions. Word has length 124 [2022-11-03 04:00:37,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:00:37,404 INFO L495 AbstractCegarLoop]: Abstraction has 791 states and 1143 transitions. [2022-11-03 04:00:37,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:37,404 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 1143 transitions. [2022-11-03 04:00:37,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 04:00:37,405 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:00:37,405 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:00:37,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-11-03 04:00:37,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:00:37,623 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:00:37,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:00:37,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1043668855, now seen corresponding path program 1 times [2022-11-03 04:00:37,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:00:37,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1208123316] [2022-11-03 04:00:37,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:37,625 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:00:37,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:00:37,626 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:00:37,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-11-03 04:00:37,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:37,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 04:00:37,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:00:38,134 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:00:38,134 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:00:38,134 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:00:38,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1208123316] [2022-11-03 04:00:38,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1208123316] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:00:38,135 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:00:38,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 04:00:38,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264741008] [2022-11-03 04:00:38,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:00:38,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 04:00:38,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:00:38,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 04:00:38,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:00:38,136 INFO L87 Difference]: Start difference. First operand 791 states and 1143 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:38,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:00:38,256 INFO L93 Difference]: Finished difference Result 1794 states and 2625 transitions. [2022-11-03 04:00:38,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 04:00:38,258 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2022-11-03 04:00:38,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:00:38,262 INFO L225 Difference]: With dead ends: 1794 [2022-11-03 04:00:38,262 INFO L226 Difference]: Without dead ends: 1171 [2022-11-03 04:00:38,263 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:00:38,264 INFO L413 NwaCegarLoop]: 308 mSDtfsCounter, 156 mSDsluCounter, 985 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 1293 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 103 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:00:38,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 1293 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 103 Unchecked, 0.1s Time] [2022-11-03 04:00:38,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1171 states. [2022-11-03 04:00:38,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1171 to 791. [2022-11-03 04:00:38,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 791 states, 790 states have (on average 1.4455696202531645) internal successors, (1142), 790 states have internal predecessors, (1142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:38,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 1142 transitions. [2022-11-03 04:00:38,289 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 1142 transitions. Word has length 124 [2022-11-03 04:00:38,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:00:38,289 INFO L495 AbstractCegarLoop]: Abstraction has 791 states and 1142 transitions. [2022-11-03 04:00:38,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:38,290 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 1142 transitions. [2022-11-03 04:00:38,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 04:00:38,290 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:00:38,291 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:00:38,318 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-11-03 04:00:38,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:00:38,509 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:00:38,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:00:38,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1565118603, now seen corresponding path program 1 times [2022-11-03 04:00:38,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:00:38,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [325515467] [2022-11-03 04:00:38,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:38,510 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:00:38,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:00:38,511 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:00:38,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-11-03 04:00:38,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:38,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 04:00:38,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:00:38,996 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:00:38,996 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:00:38,997 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:00:38,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [325515467] [2022-11-03 04:00:38,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [325515467] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:00:38,997 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:00:38,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 04:00:38,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55283395] [2022-11-03 04:00:38,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:00:38,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 04:00:38,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:00:38,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 04:00:38,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:00:38,999 INFO L87 Difference]: Start difference. First operand 791 states and 1142 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:39,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:00:39,128 INFO L93 Difference]: Finished difference Result 1766 states and 2582 transitions. [2022-11-03 04:00:39,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 04:00:39,129 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2022-11-03 04:00:39,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:00:39,132 INFO L225 Difference]: With dead ends: 1766 [2022-11-03 04:00:39,132 INFO L226 Difference]: Without dead ends: 1147 [2022-11-03 04:00:39,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 04:00:39,134 INFO L413 NwaCegarLoop]: 306 mSDtfsCounter, 170 mSDsluCounter, 782 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 1088 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:00:39,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 1088 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 69 Unchecked, 0.1s Time] [2022-11-03 04:00:39,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2022-11-03 04:00:39,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 791. [2022-11-03 04:00:39,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 791 states, 790 states have (on average 1.4443037974683544) internal successors, (1141), 790 states have internal predecessors, (1141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:39,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 1141 transitions. [2022-11-03 04:00:39,159 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 1141 transitions. Word has length 124 [2022-11-03 04:00:39,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:00:39,160 INFO L495 AbstractCegarLoop]: Abstraction has 791 states and 1141 transitions. [2022-11-03 04:00:39,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:39,160 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 1141 transitions. [2022-11-03 04:00:39,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 04:00:39,161 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:00:39,162 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:00:39,180 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-11-03 04:00:39,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:00:39,380 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:00:39,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:00:39,381 INFO L85 PathProgramCache]: Analyzing trace with hash -768274035, now seen corresponding path program 1 times [2022-11-03 04:00:39,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:00:39,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2084448587] [2022-11-03 04:00:39,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:39,382 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:00:39,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:00:39,383 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:00:39,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-11-03 04:00:39,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:39,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 04:00:39,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:00:39,874 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:00:39,874 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:00:39,874 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:00:39,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2084448587] [2022-11-03 04:00:39,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2084448587] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:00:39,875 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:00:39,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 04:00:39,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512700915] [2022-11-03 04:00:39,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:00:39,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 04:00:39,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:00:39,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 04:00:39,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:00:39,877 INFO L87 Difference]: Start difference. First operand 791 states and 1141 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:40,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:00:40,092 INFO L93 Difference]: Finished difference Result 1788 states and 2613 transitions. [2022-11-03 04:00:40,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 04:00:40,093 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2022-11-03 04:00:40,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:00:40,095 INFO L225 Difference]: With dead ends: 1788 [2022-11-03 04:00:40,095 INFO L226 Difference]: Without dead ends: 1171 [2022-11-03 04:00:40,096 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 04:00:40,097 INFO L413 NwaCegarLoop]: 364 mSDtfsCounter, 226 mSDsluCounter, 1303 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 1667 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 118 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:00:40,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 1667 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 146 Invalid, 0 Unknown, 118 Unchecked, 0.2s Time] [2022-11-03 04:00:40,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1171 states. [2022-11-03 04:00:40,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1171 to 791. [2022-11-03 04:00:40,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 791 states, 790 states have (on average 1.4430379746835442) internal successors, (1140), 790 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:40,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 1140 transitions. [2022-11-03 04:00:40,123 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 1140 transitions. Word has length 124 [2022-11-03 04:00:40,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:00:40,124 INFO L495 AbstractCegarLoop]: Abstraction has 791 states and 1140 transitions. [2022-11-03 04:00:40,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:40,124 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 1140 transitions. [2022-11-03 04:00:40,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 04:00:40,125 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:00:40,125 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:00:40,145 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2022-11-03 04:00:40,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:00:40,341 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:00:40,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:00:40,341 INFO L85 PathProgramCache]: Analyzing trace with hash -207574257, now seen corresponding path program 1 times [2022-11-03 04:00:40,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:00:40,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1347167543] [2022-11-03 04:00:40,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:40,342 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:00:40,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:00:40,345 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:00:40,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-11-03 04:00:40,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:40,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 04:00:40,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:00:40,839 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:00:40,839 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:00:40,839 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:00:40,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1347167543] [2022-11-03 04:00:40,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1347167543] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:00:40,840 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:00:40,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 04:00:40,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221569202] [2022-11-03 04:00:40,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:00:40,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 04:00:40,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:00:40,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 04:00:40,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:00:40,842 INFO L87 Difference]: Start difference. First operand 791 states and 1140 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:41,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:00:41,067 INFO L93 Difference]: Finished difference Result 1774 states and 2591 transitions. [2022-11-03 04:00:41,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 04:00:41,068 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2022-11-03 04:00:41,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:00:41,072 INFO L225 Difference]: With dead ends: 1774 [2022-11-03 04:00:41,073 INFO L226 Difference]: Without dead ends: 1159 [2022-11-03 04:00:41,074 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 04:00:41,075 INFO L413 NwaCegarLoop]: 360 mSDtfsCounter, 221 mSDsluCounter, 1293 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 1653 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 118 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:00:41,075 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 1653 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 146 Invalid, 0 Unknown, 118 Unchecked, 0.2s Time] [2022-11-03 04:00:41,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1159 states. [2022-11-03 04:00:41,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1159 to 791. [2022-11-03 04:00:41,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 791 states, 790 states have (on average 1.441772151898734) internal successors, (1139), 790 states have internal predecessors, (1139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:41,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 1139 transitions. [2022-11-03 04:00:41,101 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 1139 transitions. Word has length 124 [2022-11-03 04:00:41,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:00:41,102 INFO L495 AbstractCegarLoop]: Abstraction has 791 states and 1139 transitions. [2022-11-03 04:00:41,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:41,102 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 1139 transitions. [2022-11-03 04:00:41,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 04:00:41,103 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:00:41,104 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:00:41,122 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-11-03 04:00:41,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:00:41,322 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:00:41,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:00:41,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1053342993, now seen corresponding path program 1 times [2022-11-03 04:00:41,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:00:41,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2129967996] [2022-11-03 04:00:41,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:41,324 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:00:41,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:00:41,325 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:00:41,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-11-03 04:00:41,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:41,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 04:00:41,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:00:41,822 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:00:41,822 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:00:41,822 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:00:41,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2129967996] [2022-11-03 04:00:41,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2129967996] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:00:41,822 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:00:41,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 04:00:41,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254171817] [2022-11-03 04:00:41,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:00:41,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 04:00:41,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:00:41,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 04:00:41,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:00:41,824 INFO L87 Difference]: Start difference. First operand 791 states and 1139 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:42,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:00:42,035 INFO L93 Difference]: Finished difference Result 1732 states and 2528 transitions. [2022-11-03 04:00:42,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 04:00:42,037 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2022-11-03 04:00:42,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:00:42,040 INFO L225 Difference]: With dead ends: 1732 [2022-11-03 04:00:42,040 INFO L226 Difference]: Without dead ends: 1123 [2022-11-03 04:00:42,042 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 04:00:42,042 INFO L413 NwaCegarLoop]: 351 mSDtfsCounter, 223 mSDsluCounter, 1268 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 1619 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:00:42,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 1619 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 146 Invalid, 0 Unknown, 132 Unchecked, 0.2s Time] [2022-11-03 04:00:42,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1123 states. [2022-11-03 04:00:42,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1123 to 791. [2022-11-03 04:00:42,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 791 states, 790 states have (on average 1.440506329113924) internal successors, (1138), 790 states have internal predecessors, (1138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:42,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 1138 transitions. [2022-11-03 04:00:42,069 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 1138 transitions. Word has length 124 [2022-11-03 04:00:42,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:00:42,070 INFO L495 AbstractCegarLoop]: Abstraction has 791 states and 1138 transitions. [2022-11-03 04:00:42,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:42,070 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 1138 transitions. [2022-11-03 04:00:42,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 04:00:42,071 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:00:42,072 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:00:42,090 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2022-11-03 04:00:42,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:00:42,290 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:00:42,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:00:42,290 INFO L85 PathProgramCache]: Analyzing trace with hash -975243117, now seen corresponding path program 1 times [2022-11-03 04:00:42,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:00:42,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [532994174] [2022-11-03 04:00:42,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:42,291 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:00:42,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:00:42,292 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:00:42,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-11-03 04:00:42,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:42,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 04:00:42,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:00:42,833 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:00:42,834 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:00:42,834 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:00:42,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [532994174] [2022-11-03 04:00:42,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [532994174] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:00:42,835 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:00:42,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 04:00:42,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047955024] [2022-11-03 04:00:42,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:00:42,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 04:00:42,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:00:42,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 04:00:42,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:00:42,837 INFO L87 Difference]: Start difference. First operand 791 states and 1138 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:43,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:00:43,063 INFO L93 Difference]: Finished difference Result 1704 states and 2485 transitions. [2022-11-03 04:00:43,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 04:00:43,064 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2022-11-03 04:00:43,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:00:43,067 INFO L225 Difference]: With dead ends: 1704 [2022-11-03 04:00:43,067 INFO L226 Difference]: Without dead ends: 1099 [2022-11-03 04:00:43,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 04:00:43,069 INFO L413 NwaCegarLoop]: 344 mSDtfsCounter, 216 mSDsluCounter, 1068 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 1412 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:00:43,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 1412 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 146 Invalid, 0 Unknown, 83 Unchecked, 0.2s Time] [2022-11-03 04:00:43,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1099 states. [2022-11-03 04:00:43,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1099 to 791. [2022-11-03 04:00:43,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 791 states, 790 states have (on average 1.4392405063291138) internal successors, (1137), 790 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:43,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 1137 transitions. [2022-11-03 04:00:43,097 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 1137 transitions. Word has length 124 [2022-11-03 04:00:43,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:00:43,098 INFO L495 AbstractCegarLoop]: Abstraction has 791 states and 1137 transitions. [2022-11-03 04:00:43,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:43,098 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 1137 transitions. [2022-11-03 04:00:43,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 04:00:43,099 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:00:43,099 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:00:43,115 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (38)] Ended with exit code 0 [2022-11-03 04:00:43,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:00:43,309 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:00:43,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:00:43,309 INFO L85 PathProgramCache]: Analyzing trace with hash -1328331499, now seen corresponding path program 1 times [2022-11-03 04:00:43,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:00:43,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [876811441] [2022-11-03 04:00:43,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:43,311 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:00:43,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:00:43,312 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:00:43,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-11-03 04:00:43,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:43,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 04:00:43,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:00:43,863 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:00:43,863 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:00:43,863 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:00:43,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [876811441] [2022-11-03 04:00:43,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [876811441] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:00:43,864 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:00:43,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 04:00:43,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085668550] [2022-11-03 04:00:43,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:00:43,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 04:00:43,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:00:43,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 04:00:43,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:00:43,865 INFO L87 Difference]: Start difference. First operand 791 states and 1137 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:44,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:00:44,078 INFO L93 Difference]: Finished difference Result 1636 states and 2388 transitions. [2022-11-03 04:00:44,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 04:00:44,079 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2022-11-03 04:00:44,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:00:44,081 INFO L225 Difference]: With dead ends: 1636 [2022-11-03 04:00:44,081 INFO L226 Difference]: Without dead ends: 1039 [2022-11-03 04:00:44,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 04:00:44,082 INFO L413 NwaCegarLoop]: 328 mSDtfsCounter, 200 mSDsluCounter, 1201 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 1529 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 128 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:00:44,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 1529 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 145 Invalid, 0 Unknown, 128 Unchecked, 0.2s Time] [2022-11-03 04:00:44,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1039 states. [2022-11-03 04:00:44,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1039 to 793. [2022-11-03 04:00:44,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 793 states, 792 states have (on average 1.4381313131313131) internal successors, (1139), 792 states have internal predecessors, (1139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:44,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 1139 transitions. [2022-11-03 04:00:44,107 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 1139 transitions. Word has length 124 [2022-11-03 04:00:44,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:00:44,108 INFO L495 AbstractCegarLoop]: Abstraction has 793 states and 1139 transitions. [2022-11-03 04:00:44,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:44,108 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 1139 transitions. [2022-11-03 04:00:44,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 04:00:44,109 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:00:44,110 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:00:44,128 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2022-11-03 04:00:44,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:00:44,325 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:00:44,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:00:44,325 INFO L85 PathProgramCache]: Analyzing trace with hash -668799977, now seen corresponding path program 1 times [2022-11-03 04:00:44,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:00:44,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [874696844] [2022-11-03 04:00:44,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:44,327 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:00:44,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:00:44,329 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:00:44,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-11-03 04:00:44,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:44,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 04:00:44,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:00:44,895 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:00:44,897 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:00:44,897 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:00:44,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [874696844] [2022-11-03 04:00:44,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [874696844] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:00:44,898 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:00:44,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 04:00:44,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544918525] [2022-11-03 04:00:44,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:00:44,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 04:00:44,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:00:44,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 04:00:44,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:00:44,900 INFO L87 Difference]: Start difference. First operand 793 states and 1139 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:45,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:00:45,103 INFO L93 Difference]: Finished difference Result 1612 states and 2351 transitions. [2022-11-03 04:00:45,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 04:00:45,104 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2022-11-03 04:00:45,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:00:45,106 INFO L225 Difference]: With dead ends: 1612 [2022-11-03 04:00:45,106 INFO L226 Difference]: Without dead ends: 1015 [2022-11-03 04:00:45,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 04:00:45,107 INFO L413 NwaCegarLoop]: 321 mSDtfsCounter, 175 mSDsluCounter, 1182 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 1503 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:00:45,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 1503 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 145 Invalid, 0 Unknown, 37 Unchecked, 0.2s Time] [2022-11-03 04:00:45,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1015 states. [2022-11-03 04:00:45,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1015 to 797. [2022-11-03 04:00:45,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 797 states, 796 states have (on average 1.4371859296482412) internal successors, (1144), 796 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:45,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 797 states to 797 states and 1144 transitions. [2022-11-03 04:00:45,145 INFO L78 Accepts]: Start accepts. Automaton has 797 states and 1144 transitions. Word has length 124 [2022-11-03 04:00:45,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:00:45,146 INFO L495 AbstractCegarLoop]: Abstraction has 797 states and 1144 transitions. [2022-11-03 04:00:45,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:45,146 INFO L276 IsEmpty]: Start isEmpty. Operand 797 states and 1144 transitions. [2022-11-03 04:00:45,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 04:00:45,147 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:00:45,147 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:00:45,169 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2022-11-03 04:00:45,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:00:45,365 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:00:45,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:00:45,366 INFO L85 PathProgramCache]: Analyzing trace with hash -741186535, now seen corresponding path program 1 times [2022-11-03 04:00:45,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:00:45,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [499310958] [2022-11-03 04:00:45,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:45,366 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:00:45,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:00:45,368 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:00:45,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-11-03 04:00:45,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:45,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 04:00:45,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:00:45,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:00:45,926 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:00:45,926 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:00:45,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [499310958] [2022-11-03 04:00:45,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [499310958] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:00:45,927 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:00:45,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 04:00:45,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218637166] [2022-11-03 04:00:45,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:00:45,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 04:00:45,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:00:45,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 04:00:45,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:00:45,929 INFO L87 Difference]: Start difference. First operand 797 states and 1144 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:46,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:00:46,122 INFO L93 Difference]: Finished difference Result 1588 states and 2314 transitions. [2022-11-03 04:00:46,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 04:00:46,123 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2022-11-03 04:00:46,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:00:46,126 INFO L225 Difference]: With dead ends: 1588 [2022-11-03 04:00:46,126 INFO L226 Difference]: Without dead ends: 991 [2022-11-03 04:00:46,127 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 04:00:46,127 INFO L413 NwaCegarLoop]: 314 mSDtfsCounter, 242 mSDsluCounter, 838 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 1152 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:00:46,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [242 Valid, 1152 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 102 Invalid, 0 Unknown, 69 Unchecked, 0.1s Time] [2022-11-03 04:00:46,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 991 states. [2022-11-03 04:00:46,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 991 to 801. [2022-11-03 04:00:46,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 801 states, 800 states have (on average 1.43625) internal successors, (1149), 800 states have internal predecessors, (1149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:46,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 801 states to 801 states and 1149 transitions. [2022-11-03 04:00:46,152 INFO L78 Accepts]: Start accepts. Automaton has 801 states and 1149 transitions. Word has length 124 [2022-11-03 04:00:46,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:00:46,153 INFO L495 AbstractCegarLoop]: Abstraction has 801 states and 1149 transitions. [2022-11-03 04:00:46,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:46,153 INFO L276 IsEmpty]: Start isEmpty. Operand 801 states and 1149 transitions. [2022-11-03 04:00:46,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 04:00:46,154 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:00:46,155 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:00:46,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2022-11-03 04:00:46,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:00:46,370 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:00:46,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:00:46,370 INFO L85 PathProgramCache]: Analyzing trace with hash 645016859, now seen corresponding path program 1 times [2022-11-03 04:00:46,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:00:46,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [284139696] [2022-11-03 04:00:46,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:46,371 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:00:46,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:00:46,372 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:00:46,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-11-03 04:00:46,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:46,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 04:00:46,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:00:46,902 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:00:46,902 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:00:46,902 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:00:46,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [284139696] [2022-11-03 04:00:46,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [284139696] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:00:46,903 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:00:46,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 04:00:46,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272897777] [2022-11-03 04:00:46,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:00:46,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 04:00:46,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:00:46,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 04:00:46,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:00:46,905 INFO L87 Difference]: Start difference. First operand 801 states and 1149 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:47,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:00:47,077 INFO L93 Difference]: Finished difference Result 1576 states and 2295 transitions. [2022-11-03 04:00:47,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 04:00:47,078 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2022-11-03 04:00:47,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:00:47,079 INFO L225 Difference]: With dead ends: 1576 [2022-11-03 04:00:47,079 INFO L226 Difference]: Without dead ends: 979 [2022-11-03 04:00:47,080 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 04:00:47,081 INFO L413 NwaCegarLoop]: 310 mSDtfsCounter, 235 mSDsluCounter, 832 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 1142 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:00:47,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 1142 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 103 Invalid, 0 Unknown, 69 Unchecked, 0.1s Time] [2022-11-03 04:00:47,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 979 states. [2022-11-03 04:00:47,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 979 to 803. [2022-11-03 04:00:47,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 802 states have (on average 1.4351620947630923) internal successors, (1151), 802 states have internal predecessors, (1151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:47,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 1151 transitions. [2022-11-03 04:00:47,105 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 1151 transitions. Word has length 124 [2022-11-03 04:00:47,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:00:47,105 INFO L495 AbstractCegarLoop]: Abstraction has 803 states and 1151 transitions. [2022-11-03 04:00:47,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:47,106 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 1151 transitions. [2022-11-03 04:00:47,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 04:00:47,107 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:00:47,107 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:00:47,125 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2022-11-03 04:00:47,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:00:47,325 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:00:47,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:00:47,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1726722403, now seen corresponding path program 1 times [2022-11-03 04:00:47,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:00:47,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1883070021] [2022-11-03 04:00:47,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:47,326 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:00:47,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:00:47,327 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:00:47,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-11-03 04:00:47,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:47,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 04:00:47,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:00:47,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:00:47,866 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:00:47,866 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:00:47,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1883070021] [2022-11-03 04:00:47,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1883070021] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:00:47,866 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:00:47,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 04:00:47,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20158326] [2022-11-03 04:00:47,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:00:47,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 04:00:47,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:00:47,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 04:00:47,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:00:47,868 INFO L87 Difference]: Start difference. First operand 803 states and 1151 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:48,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:00:48,005 INFO L93 Difference]: Finished difference Result 1542 states and 2244 transitions. [2022-11-03 04:00:48,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 04:00:48,006 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2022-11-03 04:00:48,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:00:48,008 INFO L225 Difference]: With dead ends: 1542 [2022-11-03 04:00:48,008 INFO L226 Difference]: Without dead ends: 945 [2022-11-03 04:00:48,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:00:48,010 INFO L413 NwaCegarLoop]: 284 mSDtfsCounter, 139 mSDsluCounter, 780 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 1064 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:00:48,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 1064 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 87 Invalid, 0 Unknown, 39 Unchecked, 0.1s Time] [2022-11-03 04:00:48,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 945 states. [2022-11-03 04:00:48,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 945 to 805. [2022-11-03 04:00:48,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 805 states, 804 states have (on average 1.4340796019900497) internal successors, (1153), 804 states have internal predecessors, (1153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:48,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 805 states to 805 states and 1153 transitions. [2022-11-03 04:00:48,035 INFO L78 Accepts]: Start accepts. Automaton has 805 states and 1153 transitions. Word has length 124 [2022-11-03 04:00:48,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:00:48,035 INFO L495 AbstractCegarLoop]: Abstraction has 805 states and 1153 transitions. [2022-11-03 04:00:48,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:48,036 INFO L276 IsEmpty]: Start isEmpty. Operand 805 states and 1153 transitions. [2022-11-03 04:00:48,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 04:00:48,037 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:00:48,037 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:00:48,055 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (43)] Ended with exit code 0 [2022-11-03 04:00:48,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:00:48,255 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:00:48,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:00:48,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1586173793, now seen corresponding path program 1 times [2022-11-03 04:00:48,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:00:48,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1030465368] [2022-11-03 04:00:48,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:48,257 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:00:48,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:00:48,258 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:00:48,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-11-03 04:00:48,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:48,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 04:00:48,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:00:48,805 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:00:48,805 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:00:48,805 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:00:48,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1030465368] [2022-11-03 04:00:48,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1030465368] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:00:48,805 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:00:48,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 04:00:48,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359298331] [2022-11-03 04:00:48,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:00:48,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 04:00:48,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:00:48,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 04:00:48,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:00:48,807 INFO L87 Difference]: Start difference. First operand 805 states and 1153 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:48,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:00:48,983 INFO L93 Difference]: Finished difference Result 1552 states and 2257 transitions. [2022-11-03 04:00:48,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 04:00:48,984 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2022-11-03 04:00:48,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:00:48,986 INFO L225 Difference]: With dead ends: 1552 [2022-11-03 04:00:48,986 INFO L226 Difference]: Without dead ends: 955 [2022-11-03 04:00:48,987 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 04:00:48,988 INFO L413 NwaCegarLoop]: 302 mSDtfsCounter, 221 mSDsluCounter, 820 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 1122 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:00:48,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 1122 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 105 Invalid, 0 Unknown, 77 Unchecked, 0.1s Time] [2022-11-03 04:00:48,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 955 states. [2022-11-03 04:00:49,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 955 to 807. [2022-11-03 04:00:49,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 807 states, 806 states have (on average 1.433002481389578) internal successors, (1155), 806 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:49,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 807 states to 807 states and 1155 transitions. [2022-11-03 04:00:49,013 INFO L78 Accepts]: Start accepts. Automaton has 807 states and 1155 transitions. Word has length 124 [2022-11-03 04:00:49,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:00:49,014 INFO L495 AbstractCegarLoop]: Abstraction has 807 states and 1155 transitions. [2022-11-03 04:00:49,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:49,014 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states and 1155 transitions. [2022-11-03 04:00:49,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 04:00:49,015 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:00:49,015 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:00:49,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2022-11-03 04:00:49,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:00:49,229 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:00:49,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:00:49,229 INFO L85 PathProgramCache]: Analyzing trace with hash 903355169, now seen corresponding path program 1 times [2022-11-03 04:00:49,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:00:49,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [435750343] [2022-11-03 04:00:49,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:49,230 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:00:49,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:00:49,231 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:00:49,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-11-03 04:00:49,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:49,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 04:00:49,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:00:49,791 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:00:49,791 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:00:49,791 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:00:49,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [435750343] [2022-11-03 04:00:49,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [435750343] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:00:49,792 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:00:49,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 04:00:49,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087443412] [2022-11-03 04:00:49,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:00:49,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 04:00:49,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:00:49,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 04:00:49,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:00:49,794 INFO L87 Difference]: Start difference. First operand 807 states and 1155 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:49,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:00:49,998 INFO L93 Difference]: Finished difference Result 1528 states and 2221 transitions. [2022-11-03 04:00:49,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 04:00:49,999 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2022-11-03 04:00:49,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:00:50,001 INFO L225 Difference]: With dead ends: 1528 [2022-11-03 04:00:50,001 INFO L226 Difference]: Without dead ends: 931 [2022-11-03 04:00:50,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 04:00:50,002 INFO L413 NwaCegarLoop]: 296 mSDtfsCounter, 166 mSDsluCounter, 969 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 1265 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:00:50,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 1265 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 145 Invalid, 0 Unknown, 75 Unchecked, 0.2s Time] [2022-11-03 04:00:50,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2022-11-03 04:00:50,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 811. [2022-11-03 04:00:50,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 811 states, 810 states have (on average 1.4320987654320987) internal successors, (1160), 810 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:50,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 811 states to 811 states and 1160 transitions. [2022-11-03 04:00:50,019 INFO L78 Accepts]: Start accepts. Automaton has 811 states and 1160 transitions. Word has length 124 [2022-11-03 04:00:50,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:00:50,020 INFO L495 AbstractCegarLoop]: Abstraction has 811 states and 1160 transitions. [2022-11-03 04:00:50,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:50,020 INFO L276 IsEmpty]: Start isEmpty. Operand 811 states and 1160 transitions. [2022-11-03 04:00:50,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 04:00:50,021 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:00:50,022 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:00:50,040 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2022-11-03 04:00:50,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:00:50,240 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:00:50,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:00:50,241 INFO L85 PathProgramCache]: Analyzing trace with hash -785588573, now seen corresponding path program 1 times [2022-11-03 04:00:50,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:00:50,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [688937176] [2022-11-03 04:00:50,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:50,243 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:00:50,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:00:50,244 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:00:50,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-11-03 04:00:50,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:50,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 04:00:50,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:00:50,831 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:00:50,832 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:00:50,832 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:00:50,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [688937176] [2022-11-03 04:00:50,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [688937176] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:00:50,832 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:00:50,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 04:00:50,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178975652] [2022-11-03 04:00:50,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:00:50,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 04:00:50,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:00:50,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 04:00:50,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:00:50,834 INFO L87 Difference]: Start difference. First operand 811 states and 1160 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:50,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:00:50,998 INFO L93 Difference]: Finished difference Result 1495 states and 2171 transitions. [2022-11-03 04:00:50,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 04:00:50,998 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2022-11-03 04:00:50,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:00:51,000 INFO L225 Difference]: With dead ends: 1495 [2022-11-03 04:00:51,000 INFO L226 Difference]: Without dead ends: 898 [2022-11-03 04:00:51,000 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 04:00:51,001 INFO L413 NwaCegarLoop]: 280 mSDtfsCounter, 169 mSDsluCounter, 784 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 1064 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:00:51,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 1064 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 101 Invalid, 0 Unknown, 69 Unchecked, 0.1s Time] [2022-11-03 04:00:51,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2022-11-03 04:00:51,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 815. [2022-11-03 04:00:51,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 815 states, 814 states have (on average 1.4312039312039313) internal successors, (1165), 814 states have internal predecessors, (1165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:51,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 815 states to 815 states and 1165 transitions. [2022-11-03 04:00:51,025 INFO L78 Accepts]: Start accepts. Automaton has 815 states and 1165 transitions. Word has length 124 [2022-11-03 04:00:51,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:00:51,026 INFO L495 AbstractCegarLoop]: Abstraction has 815 states and 1165 transitions. [2022-11-03 04:00:51,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:51,026 INFO L276 IsEmpty]: Start isEmpty. Operand 815 states and 1165 transitions. [2022-11-03 04:00:51,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 04:00:51,027 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:00:51,028 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:00:51,041 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (46)] Ended with exit code 0 [2022-11-03 04:00:51,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:00:51,237 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:00:51,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:00:51,238 INFO L85 PathProgramCache]: Analyzing trace with hash -2065452251, now seen corresponding path program 1 times [2022-11-03 04:00:51,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:00:51,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [773947826] [2022-11-03 04:00:51,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:51,239 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:00:51,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:00:51,240 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:00:51,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2022-11-03 04:00:51,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:51,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 04:00:51,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:00:51,796 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:00:51,797 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:00:51,797 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:00:51,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [773947826] [2022-11-03 04:00:51,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [773947826] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:00:51,797 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:00:51,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 04:00:51,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551256316] [2022-11-03 04:00:51,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:00:51,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 04:00:51,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:00:51,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 04:00:51,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:00:51,799 INFO L87 Difference]: Start difference. First operand 815 states and 1165 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:52,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:00:52,002 INFO L93 Difference]: Finished difference Result 1480 states and 2147 transitions. [2022-11-03 04:00:52,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 04:00:52,003 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2022-11-03 04:00:52,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:00:52,004 INFO L225 Difference]: With dead ends: 1480 [2022-11-03 04:00:52,004 INFO L226 Difference]: Without dead ends: 883 [2022-11-03 04:00:52,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 04:00:52,005 INFO L413 NwaCegarLoop]: 282 mSDtfsCounter, 126 mSDsluCounter, 1079 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 1361 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:00:52,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 1361 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 145 Invalid, 0 Unknown, 105 Unchecked, 0.2s Time] [2022-11-03 04:00:52,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2022-11-03 04:00:52,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 819. [2022-11-03 04:00:52,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 819 states, 818 states have (on average 1.430317848410758) internal successors, (1170), 818 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:52,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 1170 transitions. [2022-11-03 04:00:52,023 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 1170 transitions. Word has length 124 [2022-11-03 04:00:52,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:00:52,023 INFO L495 AbstractCegarLoop]: Abstraction has 819 states and 1170 transitions. [2022-11-03 04:00:52,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:52,024 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 1170 transitions. [2022-11-03 04:00:52,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 04:00:52,025 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:00:52,025 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:00:52,042 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (47)] Ended with exit code 0 [2022-11-03 04:00:52,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:00:52,239 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:00:52,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:00:52,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1364387673, now seen corresponding path program 1 times [2022-11-03 04:00:52,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:00:52,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2036490428] [2022-11-03 04:00:52,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:52,241 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:00:52,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:00:52,242 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:00:52,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2022-11-03 04:00:52,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:52,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 04:00:52,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:00:52,823 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:00:52,824 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:00:52,824 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:00:52,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2036490428] [2022-11-03 04:00:52,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2036490428] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:00:52,824 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:00:52,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 04:00:52,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959397234] [2022-11-03 04:00:52,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:00:52,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 04:00:52,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:00:52,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 04:00:52,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:00:52,825 INFO L87 Difference]: Start difference. First operand 819 states and 1170 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:53,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:00:53,029 INFO L93 Difference]: Finished difference Result 1468 states and 2128 transitions. [2022-11-03 04:00:53,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 04:00:53,030 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2022-11-03 04:00:53,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:00:53,032 INFO L225 Difference]: With dead ends: 1468 [2022-11-03 04:00:53,032 INFO L226 Difference]: Without dead ends: 871 [2022-11-03 04:00:53,033 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 04:00:53,033 INFO L413 NwaCegarLoop]: 278 mSDtfsCounter, 121 mSDsluCounter, 1069 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 1347 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 103 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:00:53,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 1347 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 145 Invalid, 0 Unknown, 103 Unchecked, 0.2s Time] [2022-11-03 04:00:53,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2022-11-03 04:00:53,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 821. [2022-11-03 04:00:53,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 820 states have (on average 1.4292682926829268) internal successors, (1172), 820 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:53,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 1172 transitions. [2022-11-03 04:00:53,052 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 1172 transitions. Word has length 124 [2022-11-03 04:00:53,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:00:53,052 INFO L495 AbstractCegarLoop]: Abstraction has 821 states and 1172 transitions. [2022-11-03 04:00:53,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:53,052 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 1172 transitions. [2022-11-03 04:00:53,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 04:00:53,053 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:00:53,053 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:00:53,070 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (48)] Ended with exit code 0 [2022-11-03 04:00:53,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:00:53,257 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:00:53,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:00:53,257 INFO L85 PathProgramCache]: Analyzing trace with hash -684329303, now seen corresponding path program 1 times [2022-11-03 04:00:53,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:00:53,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [406758140] [2022-11-03 04:00:53,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:53,258 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:00:53,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:00:53,260 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:00:53,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2022-11-03 04:00:53,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:53,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 04:00:53,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:00:53,855 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:00:53,855 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:00:53,855 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:00:53,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [406758140] [2022-11-03 04:00:53,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [406758140] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:00:53,856 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:00:53,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 04:00:53,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103154483] [2022-11-03 04:00:53,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:00:53,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 04:00:53,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:00:53,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 04:00:53,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:00:53,857 INFO L87 Difference]: Start difference. First operand 821 states and 1172 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:54,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:00:54,021 INFO L93 Difference]: Finished difference Result 1444 states and 2093 transitions. [2022-11-03 04:00:54,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 04:00:54,022 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2022-11-03 04:00:54,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:00:54,024 INFO L225 Difference]: With dead ends: 1444 [2022-11-03 04:00:54,024 INFO L226 Difference]: Without dead ends: 847 [2022-11-03 04:00:54,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:00:54,026 INFO L413 NwaCegarLoop]: 270 mSDtfsCounter, 129 mSDsluCounter, 909 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 1179 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:00:54,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 1179 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 111 Invalid, 0 Unknown, 69 Unchecked, 0.1s Time] [2022-11-03 04:00:54,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2022-11-03 04:00:54,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 825. [2022-11-03 04:00:54,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 825 states, 824 states have (on average 1.4283980582524272) internal successors, (1177), 824 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:54,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 825 states to 825 states and 1177 transitions. [2022-11-03 04:00:54,055 INFO L78 Accepts]: Start accepts. Automaton has 825 states and 1177 transitions. Word has length 124 [2022-11-03 04:00:54,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:00:54,055 INFO L495 AbstractCegarLoop]: Abstraction has 825 states and 1177 transitions. [2022-11-03 04:00:54,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:54,056 INFO L276 IsEmpty]: Start isEmpty. Operand 825 states and 1177 transitions. [2022-11-03 04:00:54,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 04:00:54,057 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:00:54,057 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:00:54,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2022-11-03 04:00:54,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:00:54,275 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:00:54,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:00:54,276 INFO L85 PathProgramCache]: Analyzing trace with hash -682482261, now seen corresponding path program 1 times [2022-11-03 04:00:54,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:00:54,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1331670298] [2022-11-03 04:00:54,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:54,277 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:00:54,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:00:54,278 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:00:54,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2022-11-03 04:00:54,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:54,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 98 conjunts are in the unsatisfiable core [2022-11-03 04:00:54,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:00:58,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:00:58,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:01:08,316 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:01:08,317 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:01:08,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1331670298] [2022-11-03 04:01:08,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1331670298] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:01:08,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [483772461] [2022-11-03 04:01:08,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:08,318 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:01:08,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:01:08,321 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:01:08,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (51)] Waiting until timeout for monitored process [2022-11-03 04:01:08,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:08,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 98 conjunts are in the unsatisfiable core [2022-11-03 04:01:08,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:11,440 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:01:11,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:01:12,395 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:01:12,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [483772461] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:01:12,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314671828] [2022-11-03 04:01:12,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:12,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:01:12,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:01:12,397 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:01:12,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-11-03 04:01:12,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:12,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 101 conjunts are in the unsatisfiable core [2022-11-03 04:01:12,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:15,396 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:01:15,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:01:16,692 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:01:16,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314671828] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:01:16,694 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:01:16,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36, 36, 37, 37] total 72 [2022-11-03 04:01:16,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714850494] [2022-11-03 04:01:16,695 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:01:16,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-11-03 04:01:16,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:01:16,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-11-03 04:01:16,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=4932, Unknown=0, NotChecked=0, Total=5112 [2022-11-03 04:01:16,698 INFO L87 Difference]: Start difference. First operand 825 states and 1177 transitions. Second operand has 72 states, 72 states have (on average 3.4722222222222223) internal successors, (250), 72 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 04:01:27,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:01:27,003 INFO L93 Difference]: Finished difference Result 1863 states and 2556 transitions. [2022-11-03 04:01:27,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-03 04:01:27,003 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 3.4722222222222223) internal successors, (250), 72 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) Word has length 124 [2022-11-03 04:01:27,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:01:27,006 INFO L225 Difference]: With dead ends: 1863 [2022-11-03 04:01:27,006 INFO L226 Difference]: Without dead ends: 1861 [2022-11-03 04:01:27,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 774 GetRequests, 666 SyntacticMatches, 4 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1085 ImplicationChecksByTransitivity, 19.4s TimeCoverageRelationStatistics Valid=1126, Invalid=10004, Unknown=0, NotChecked=0, Total=11130 [2022-11-03 04:01:27,009 INFO L413 NwaCegarLoop]: 456 mSDtfsCounter, 5158 mSDsluCounter, 19389 mSDsCounter, 0 mSdLazyCounter, 1335 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5158 SdHoareTripleChecker+Valid, 19845 SdHoareTripleChecker+Invalid, 4937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3562 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-03 04:01:27,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5158 Valid, 19845 Invalid, 4937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1335 Invalid, 0 Unknown, 3562 Unchecked, 1.8s Time] [2022-11-03 04:01:27,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1861 states. [2022-11-03 04:01:27,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1861 to 940. [2022-11-03 04:01:27,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 940 states, 939 states have (on average 1.3993610223642172) internal successors, (1314), 939 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:27,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 1314 transitions. [2022-11-03 04:01:27,035 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 1314 transitions. Word has length 124 [2022-11-03 04:01:27,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:01:27,035 INFO L495 AbstractCegarLoop]: Abstraction has 940 states and 1314 transitions. [2022-11-03 04:01:27,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 3.4722222222222223) internal successors, (250), 72 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 04:01:27,036 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 1314 transitions. [2022-11-03 04:01:27,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 04:01:27,036 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:01:27,037 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:01:27,064 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-11-03 04:01:27,242 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (51)] Ended with exit code 0 [2022-11-03 04:01:27,448 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (50)] Ended with exit code 0 [2022-11-03 04:01:27,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:01:27,638 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:01:27,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:01:27,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1565991251, now seen corresponding path program 1 times [2022-11-03 04:01:27,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:01:27,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [218548716] [2022-11-03 04:01:27,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:27,639 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:01:27,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:01:27,640 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:01:27,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2022-11-03 04:01:27,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:27,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 04:01:27,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:28,191 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:01:28,191 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:01:28,191 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:01:28,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [218548716] [2022-11-03 04:01:28,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [218548716] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:01:28,192 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:01:28,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 04:01:28,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505185573] [2022-11-03 04:01:28,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:01:28,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:01:28,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:01:28,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:01:28,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:01:28,194 INFO L87 Difference]: Start difference. First operand 940 states and 1314 transitions. Second operand has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:28,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:01:28,389 INFO L93 Difference]: Finished difference Result 1819 states and 2583 transitions. [2022-11-03 04:01:28,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:01:28,389 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2022-11-03 04:01:28,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:01:28,391 INFO L225 Difference]: With dead ends: 1819 [2022-11-03 04:01:28,391 INFO L226 Difference]: Without dead ends: 1048 [2022-11-03 04:01:28,391 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:01:28,392 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 480 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 480 SdHoareTripleChecker+Valid, 701 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 04:01:28,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [480 Valid, 701 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:01:28,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1048 states. [2022-11-03 04:01:28,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1048 to 940. [2022-11-03 04:01:28,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 940 states, 939 states have (on average 1.3961661341853036) internal successors, (1311), 939 states have internal predecessors, (1311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:28,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 1311 transitions. [2022-11-03 04:01:28,414 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 1311 transitions. Word has length 124 [2022-11-03 04:01:28,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:01:28,414 INFO L495 AbstractCegarLoop]: Abstraction has 940 states and 1311 transitions. [2022-11-03 04:01:28,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:28,414 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 1311 transitions. [2022-11-03 04:01:28,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 04:01:28,415 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:01:28,416 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:01:28,428 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (53)] Ended with exit code 0 [2022-11-03 04:01:28,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:01:28,617 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:01:28,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:01:28,617 INFO L85 PathProgramCache]: Analyzing trace with hash 918588845, now seen corresponding path program 1 times [2022-11-03 04:01:28,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:01:28,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1825421680] [2022-11-03 04:01:28,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:28,619 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:01:28,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:01:28,620 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:01:28,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2022-11-03 04:01:28,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:29,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 04:01:29,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:29,183 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:01:29,183 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:01:29,183 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:01:29,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1825421680] [2022-11-03 04:01:29,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1825421680] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:01:29,183 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:01:29,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 04:01:29,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686881785] [2022-11-03 04:01:29,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:01:29,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:01:29,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:01:29,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:01:29,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:01:29,185 INFO L87 Difference]: Start difference. First operand 940 states and 1311 transitions. Second operand has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:29,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:01:29,391 INFO L93 Difference]: Finished difference Result 1809 states and 2562 transitions. [2022-11-03 04:01:29,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:01:29,392 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2022-11-03 04:01:29,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:01:29,394 INFO L225 Difference]: With dead ends: 1809 [2022-11-03 04:01:29,394 INFO L226 Difference]: Without dead ends: 1030 [2022-11-03 04:01:29,395 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:01:29,395 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 481 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 481 SdHoareTripleChecker+Valid, 696 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:01:29,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [481 Valid, 696 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:01:29,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1030 states. [2022-11-03 04:01:29,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1030 to 940. [2022-11-03 04:01:29,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 940 states, 939 states have (on average 1.3929712460063899) internal successors, (1308), 939 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:29,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 1308 transitions. [2022-11-03 04:01:29,430 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 1308 transitions. Word has length 124 [2022-11-03 04:01:29,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:01:29,430 INFO L495 AbstractCegarLoop]: Abstraction has 940 states and 1308 transitions. [2022-11-03 04:01:29,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:29,430 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 1308 transitions. [2022-11-03 04:01:29,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 04:01:29,432 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:01:29,432 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:01:29,450 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (54)] Ended with exit code 0 [2022-11-03 04:01:29,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:01:29,650 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:01:29,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:01:29,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1350911785, now seen corresponding path program 1 times [2022-11-03 04:01:29,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:01:29,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [195007372] [2022-11-03 04:01:29,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:29,652 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:01:29,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:01:29,653 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:01:29,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2022-11-03 04:01:29,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:30,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 04:01:30,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:30,085 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:01:30,085 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:01:30,085 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:01:30,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [195007372] [2022-11-03 04:01:30,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [195007372] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:01:30,085 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:01:30,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 04:01:30,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390006759] [2022-11-03 04:01:30,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:01:30,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 04:01:30,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:01:30,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 04:01:30,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:01:30,087 INFO L87 Difference]: Start difference. First operand 940 states and 1308 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:30,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:01:30,345 INFO L93 Difference]: Finished difference Result 1843 states and 2620 transitions. [2022-11-03 04:01:30,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 04:01:30,346 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2022-11-03 04:01:30,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:01:30,348 INFO L225 Difference]: With dead ends: 1843 [2022-11-03 04:01:30,348 INFO L226 Difference]: Without dead ends: 1148 [2022-11-03 04:01:30,349 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 04:01:30,349 INFO L413 NwaCegarLoop]: 290 mSDtfsCounter, 400 mSDsluCounter, 1218 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 1508 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 155 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:01:30,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [400 Valid, 1508 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 143 Invalid, 0 Unknown, 155 Unchecked, 0.2s Time] [2022-11-03 04:01:30,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1148 states. [2022-11-03 04:01:30,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1148 to 940. [2022-11-03 04:01:30,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 940 states, 939 states have (on average 1.3908413205537806) internal successors, (1306), 939 states have internal predecessors, (1306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:30,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 1306 transitions. [2022-11-03 04:01:30,371 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 1306 transitions. Word has length 124 [2022-11-03 04:01:30,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:01:30,372 INFO L495 AbstractCegarLoop]: Abstraction has 940 states and 1306 transitions. [2022-11-03 04:01:30,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:30,372 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 1306 transitions. [2022-11-03 04:01:30,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 04:01:30,373 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:01:30,373 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:01:30,391 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (55)] Ended with exit code 0 [2022-11-03 04:01:30,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:01:30,574 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:01:30,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:01:30,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1470624557, now seen corresponding path program 1 times [2022-11-03 04:01:30,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:01:30,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1616247578] [2022-11-03 04:01:30,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:30,575 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:01:30,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:01:30,576 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:01:30,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2022-11-03 04:01:30,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:30,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 04:01:30,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:31,058 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:01:31,058 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:01:31,058 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:01:31,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1616247578] [2022-11-03 04:01:31,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1616247578] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:01:31,058 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:01:31,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:01:31,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850637789] [2022-11-03 04:01:31,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:01:31,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:01:31,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:01:31,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:01:31,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:01:31,060 INFO L87 Difference]: Start difference. First operand 940 states and 1306 transitions. Second operand has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:31,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:01:31,184 INFO L93 Difference]: Finished difference Result 1789 states and 2517 transitions. [2022-11-03 04:01:31,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 04:01:31,185 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2022-11-03 04:01:31,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:01:31,186 INFO L225 Difference]: With dead ends: 1789 [2022-11-03 04:01:31,186 INFO L226 Difference]: Without dead ends: 990 [2022-11-03 04:01:31,187 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 121 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 04:01:31,187 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 317 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 533 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 04:01:31,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [317 Valid, 533 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:01:31,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 990 states. [2022-11-03 04:01:31,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 990 to 940. [2022-11-03 04:01:31,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 940 states, 939 states have (on average 1.387646432374867) internal successors, (1303), 939 states have internal predecessors, (1303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:31,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 1303 transitions. [2022-11-03 04:01:31,219 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 1303 transitions. Word has length 124 [2022-11-03 04:01:31,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:01:31,220 INFO L495 AbstractCegarLoop]: Abstraction has 940 states and 1303 transitions. [2022-11-03 04:01:31,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:31,220 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 1303 transitions. [2022-11-03 04:01:31,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 04:01:31,221 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:01:31,222 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:01:31,240 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (56)] Forceful destruction successful, exit code 0 [2022-11-03 04:01:31,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:01:31,439 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:01:31,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:01:31,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1039520425, now seen corresponding path program 1 times [2022-11-03 04:01:31,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:01:31,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [748371773] [2022-11-03 04:01:31,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:31,441 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:01:31,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:01:31,442 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:01:31,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2022-11-03 04:01:31,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:31,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 04:01:31,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:31,790 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:01:31,790 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:01:31,790 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:01:31,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [748371773] [2022-11-03 04:01:31,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [748371773] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:01:31,790 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:01:31,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:01:31,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265011718] [2022-11-03 04:01:31,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:01:31,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:01:31,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:01:31,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:01:31,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:01:31,792 INFO L87 Difference]: Start difference. First operand 940 states and 1303 transitions. Second operand has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:31,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:01:31,859 INFO L93 Difference]: Finished difference Result 2240 states and 3218 transitions. [2022-11-03 04:01:31,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 04:01:31,861 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2022-11-03 04:01:31,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:01:31,864 INFO L225 Difference]: With dead ends: 2240 [2022-11-03 04:01:31,865 INFO L226 Difference]: Without dead ends: 1423 [2022-11-03 04:01:31,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 121 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 04:01:31,867 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 492 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 492 SdHoareTripleChecker+Valid, 534 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:01:31,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [492 Valid, 534 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 04:01:31,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1423 states. [2022-11-03 04:01:31,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1423 to 828. [2022-11-03 04:01:31,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 828 states, 827 states have (on average 1.4171704957678355) internal successors, (1172), 827 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:31,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 1172 transitions. [2022-11-03 04:01:31,904 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 1172 transitions. Word has length 124 [2022-11-03 04:01:31,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:01:31,904 INFO L495 AbstractCegarLoop]: Abstraction has 828 states and 1172 transitions. [2022-11-03 04:01:31,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:31,905 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 1172 transitions. [2022-11-03 04:01:31,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-11-03 04:01:31,907 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:01:31,908 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:01:31,926 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (57)] Forceful destruction successful, exit code 0 [2022-11-03 04:01:32,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:01:32,126 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:01:32,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:01:32,126 INFO L85 PathProgramCache]: Analyzing trace with hash -2018584569, now seen corresponding path program 1 times [2022-11-03 04:01:32,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:01:32,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2099821757] [2022-11-03 04:01:32,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:32,128 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:01:32,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:01:32,132 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:01:32,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2022-11-03 04:01:32,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:32,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 04:01:32,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:33,163 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 119 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:01:33,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:01:33,649 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 119 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:01:33,649 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:01:33,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2099821757] [2022-11-03 04:01:33,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2099821757] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:01:33,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1931943492] [2022-11-03 04:01:33,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:33,650 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:01:33,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:01:33,651 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:01:33,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (59)] Waiting until timeout for monitored process [2022-11-03 04:01:34,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:34,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:01:34,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:34,531 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 118 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 04:01:34,531 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:01:34,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1931943492] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:01:34,531 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:01:34,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 16 [2022-11-03 04:01:34,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019200605] [2022-11-03 04:01:34,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:01:34,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:01:34,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:01:34,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:01:34,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2022-11-03 04:01:34,534 INFO L87 Difference]: Start difference. First operand 828 states and 1172 transitions. Second operand has 5 states, 5 states have (on average 48.0) internal successors, (240), 5 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 04:01:34,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:01:34,685 INFO L93 Difference]: Finished difference Result 2609 states and 3824 transitions. [2022-11-03 04:01:34,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 04:01:34,686 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 48.0) internal successors, (240), 5 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) Word has length 243 [2022-11-03 04:01:34,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:01:34,689 INFO L225 Difference]: With dead ends: 2609 [2022-11-03 04:01:34,690 INFO L226 Difference]: Without dead ends: 2012 [2022-11-03 04:01:34,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 732 GetRequests, 715 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-11-03 04:01:34,692 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 858 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 858 SdHoareTripleChecker+Valid, 701 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:01:34,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [858 Valid, 701 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:01:34,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2012 states. [2022-11-03 04:01:34,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2012 to 862. [2022-11-03 04:01:34,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 861 states have (on average 1.413472706155633) internal successors, (1217), 861 states have internal predecessors, (1217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:34,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 1217 transitions. [2022-11-03 04:01:34,730 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 1217 transitions. Word has length 243 [2022-11-03 04:01:34,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:01:34,730 INFO L495 AbstractCegarLoop]: Abstraction has 862 states and 1217 transitions. [2022-11-03 04:01:34,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 48.0) internal successors, (240), 5 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 04:01:34,731 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 1217 transitions. [2022-11-03 04:01:34,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-11-03 04:01:34,734 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:01:34,734 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:01:34,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (58)] Forceful destruction successful, exit code 0 [2022-11-03 04:01:34,959 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (59)] Ended with exit code 0 [2022-11-03 04:01:35,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:01:35,156 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:01:35,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:01:35,156 INFO L85 PathProgramCache]: Analyzing trace with hash 629019785, now seen corresponding path program 1 times [2022-11-03 04:01:35,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:01:35,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [336448926] [2022-11-03 04:01:35,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:35,158 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:01:35,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:01:35,159 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:01:35,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (60)] Waiting until timeout for monitored process [2022-11-03 04:01:35,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:35,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 04:01:35,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:36,182 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 119 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:01:36,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:01:36,653 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 119 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:01:36,654 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:01:36,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [336448926] [2022-11-03 04:01:36,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [336448926] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:01:36,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [511758403] [2022-11-03 04:01:36,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:36,654 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:01:36,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:01:36,656 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:01:36,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (61)] Waiting until timeout for monitored process [2022-11-03 04:01:37,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:37,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:01:37,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:37,531 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 116 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 04:01:37,531 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:01:37,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [511758403] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:01:37,531 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:01:37,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 16 [2022-11-03 04:01:37,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181285230] [2022-11-03 04:01:37,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:01:37,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:01:37,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:01:37,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:01:37,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2022-11-03 04:01:37,533 INFO L87 Difference]: Start difference. First operand 862 states and 1217 transitions. Second operand has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 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 04:01:37,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:01:37,791 INFO L93 Difference]: Finished difference Result 1980 states and 2872 transitions. [2022-11-03 04:01:37,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:01:37,792 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 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) Word has length 243 [2022-11-03 04:01:37,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:01:37,794 INFO L225 Difference]: With dead ends: 1980 [2022-11-03 04:01:37,794 INFO L226 Difference]: Without dead ends: 1349 [2022-11-03 04:01:37,795 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 732 GetRequests, 715 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-11-03 04:01:37,796 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 833 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 833 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:01:37,796 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [833 Valid, 615 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:01:37,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1349 states. [2022-11-03 04:01:37,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1349 to 884. [2022-11-03 04:01:37,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 883 states have (on average 1.4099660249150623) internal successors, (1245), 883 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:37,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 1245 transitions. [2022-11-03 04:01:37,830 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 1245 transitions. Word has length 243 [2022-11-03 04:01:37,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:01:37,830 INFO L495 AbstractCegarLoop]: Abstraction has 884 states and 1245 transitions. [2022-11-03 04:01:37,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 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 04:01:37,831 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 1245 transitions. [2022-11-03 04:01:37,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-11-03 04:01:37,834 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:01:37,834 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:01:37,856 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (60)] Forceful destruction successful, exit code 0 [2022-11-03 04:01:38,053 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (61)] Forceful destruction successful, exit code 0 [2022-11-03 04:01:38,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:01:38,249 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:01:38,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:01:38,250 INFO L85 PathProgramCache]: Analyzing trace with hash 721831817, now seen corresponding path program 1 times [2022-11-03 04:01:38,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:01:38,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1536689174] [2022-11-03 04:01:38,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:38,251 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:01:38,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:01:38,252 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:01:38,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (62)] Waiting until timeout for monitored process [2022-11-03 04:01:38,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:38,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 04:01:38,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:39,273 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 119 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:01:39,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:01:39,782 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 119 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:01:39,782 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:01:39,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1536689174] [2022-11-03 04:01:39,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1536689174] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:01:39,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1117904053] [2022-11-03 04:01:39,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:39,782 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:01:39,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:01:39,783 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:01:39,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (63)] Waiting until timeout for monitored process [2022-11-03 04:01:40,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:40,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:01:40,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:40,687 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 116 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 04:01:40,687 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:01:40,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1117904053] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:01:40,687 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:01:40,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 16 [2022-11-03 04:01:40,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178385783] [2022-11-03 04:01:40,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:01:40,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:01:40,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:01:40,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:01:40,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2022-11-03 04:01:40,690 INFO L87 Difference]: Start difference. First operand 884 states and 1245 transitions. Second operand has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 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 04:01:40,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:01:40,969 INFO L93 Difference]: Finished difference Result 2017 states and 2916 transitions. [2022-11-03 04:01:40,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:01:40,970 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 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) Word has length 243 [2022-11-03 04:01:40,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:01:40,972 INFO L225 Difference]: With dead ends: 2017 [2022-11-03 04:01:40,973 INFO L226 Difference]: Without dead ends: 1364 [2022-11-03 04:01:40,973 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 732 GetRequests, 715 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-11-03 04:01:40,974 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 858 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 858 SdHoareTripleChecker+Valid, 594 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:01:40,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [858 Valid, 594 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:01:40,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1364 states. [2022-11-03 04:01:40,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1364 to 904. [2022-11-03 04:01:40,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 903 states have (on average 1.406423034330011) internal successors, (1270), 903 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:40,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 1270 transitions. [2022-11-03 04:01:40,996 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 1270 transitions. Word has length 243 [2022-11-03 04:01:40,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:01:40,996 INFO L495 AbstractCegarLoop]: Abstraction has 904 states and 1270 transitions. [2022-11-03 04:01:40,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 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 04:01:40,996 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 1270 transitions. [2022-11-03 04:01:40,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-11-03 04:01:40,998 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:01:40,999 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:01:41,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (62)] Forceful destruction successful, exit code 0 [2022-11-03 04:01:41,225 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (63)] Ended with exit code 0 [2022-11-03 04:01:41,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:01:41,421 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:01:41,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:01:41,422 INFO L85 PathProgramCache]: Analyzing trace with hash -281168247, now seen corresponding path program 1 times [2022-11-03 04:01:41,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:01:41,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1570806120] [2022-11-03 04:01:41,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:41,423 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:01:41,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:01:41,424 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:01:41,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (64)] Waiting until timeout for monitored process [2022-11-03 04:01:41,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:41,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 04:01:41,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:42,432 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 119 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:01:42,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:01:42,937 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 119 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:01:42,938 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:01:42,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1570806120] [2022-11-03 04:01:42,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1570806120] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:01:42,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [23655782] [2022-11-03 04:01:42,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:42,938 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:01:42,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:01:42,940 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:01:42,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (65)] Waiting until timeout for monitored process [2022-11-03 04:01:43,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:43,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:01:43,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:43,822 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 116 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 04:01:43,822 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:01:43,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [23655782] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:01:43,823 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:01:43,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 16 [2022-11-03 04:01:43,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223711015] [2022-11-03 04:01:43,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:01:43,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:01:43,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:01:43,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:01:43,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2022-11-03 04:01:43,825 INFO L87 Difference]: Start difference. First operand 904 states and 1270 transitions. Second operand has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 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 04:01:44,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:01:44,089 INFO L93 Difference]: Finished difference Result 1800 states and 2586 transitions. [2022-11-03 04:01:44,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:01:44,090 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 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) Word has length 243 [2022-11-03 04:01:44,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:01:44,092 INFO L225 Difference]: With dead ends: 1800 [2022-11-03 04:01:44,092 INFO L226 Difference]: Without dead ends: 1127 [2022-11-03 04:01:44,093 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 732 GetRequests, 715 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-11-03 04:01:44,093 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 857 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 857 SdHoareTripleChecker+Valid, 590 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:01:44,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [857 Valid, 590 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:01:44,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1127 states. [2022-11-03 04:01:44,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1127 to 668. [2022-11-03 04:01:44,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 668 states, 667 states have (on average 1.3778110944527737) internal successors, (919), 667 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:44,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 919 transitions. [2022-11-03 04:01:44,121 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 919 transitions. Word has length 243 [2022-11-03 04:01:44,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:01:44,122 INFO L495 AbstractCegarLoop]: Abstraction has 668 states and 919 transitions. [2022-11-03 04:01:44,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 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 04:01:44,122 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 919 transitions. [2022-11-03 04:01:44,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-11-03 04:01:44,124 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:01:44,125 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:01:44,130 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (65)] Ended with exit code 0 [2022-11-03 04:01:44,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (64)] Forceful destruction successful, exit code 0 [2022-11-03 04:01:44,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:01:44,530 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:01:44,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:01:44,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1514111991, now seen corresponding path program 1 times [2022-11-03 04:01:44,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:01:44,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1699245338] [2022-11-03 04:01:44,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:44,532 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:01:44,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:01:44,533 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:01:44,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (66)] Waiting until timeout for monitored process [2022-11-03 04:01:45,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:45,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 04:01:45,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:45,535 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 119 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:01:45,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:01:46,025 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 119 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:01:46,025 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:01:46,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1699245338] [2022-11-03 04:01:46,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1699245338] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:01:46,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [7634381] [2022-11-03 04:01:46,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:46,026 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:01:46,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:01:46,027 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:01:46,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (67)] Waiting until timeout for monitored process [2022-11-03 04:01:46,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:46,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:01:46,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:46,889 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 116 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 04:01:46,889 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:01:46,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [7634381] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:01:46,889 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:01:46,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 16 [2022-11-03 04:01:46,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798036089] [2022-11-03 04:01:46,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:01:46,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:01:46,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:01:46,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:01:46,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2022-11-03 04:01:46,892 INFO L87 Difference]: Start difference. First operand 668 states and 919 transitions. Second operand has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 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 04:01:47,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:01:47,152 INFO L93 Difference]: Finished difference Result 1544 states and 2205 transitions. [2022-11-03 04:01:47,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:01:47,153 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 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) Word has length 243 [2022-11-03 04:01:47,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:01:47,155 INFO L225 Difference]: With dead ends: 1544 [2022-11-03 04:01:47,155 INFO L226 Difference]: Without dead ends: 1107 [2022-11-03 04:01:47,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 732 GetRequests, 715 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-11-03 04:01:47,156 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 860 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 860 SdHoareTripleChecker+Valid, 581 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:01:47,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [860 Valid, 581 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:01:47,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1107 states. [2022-11-03 04:01:47,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1107 to 664. [2022-11-03 04:01:47,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 663 states have (on average 1.3725490196078431) internal successors, (910), 663 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:47,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 910 transitions. [2022-11-03 04:01:47,173 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 910 transitions. Word has length 243 [2022-11-03 04:01:47,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:01:47,173 INFO L495 AbstractCegarLoop]: Abstraction has 664 states and 910 transitions. [2022-11-03 04:01:47,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 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 04:01:47,174 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 910 transitions. [2022-11-03 04:01:47,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-11-03 04:01:47,176 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:01:47,176 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:01:47,198 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (66)] Ended with exit code 0 [2022-11-03 04:01:47,402 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (67)] Ended with exit code 0 [2022-11-03 04:01:47,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:01:47,599 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:01:47,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:01:47,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1623829257, now seen corresponding path program 1 times [2022-11-03 04:01:47,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:01:47,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1175823445] [2022-11-03 04:01:47,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:47,601 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:01:47,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:01:47,605 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:01:47,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (68)] Waiting until timeout for monitored process [2022-11-03 04:01:48,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:48,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 04:01:48,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:48,623 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 119 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:01:48,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:01:49,151 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 119 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:01:49,151 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:01:49,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1175823445] [2022-11-03 04:01:49,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1175823445] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:01:49,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1218682877] [2022-11-03 04:01:49,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:49,152 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:01:49,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:01:49,153 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:01:49,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (69)] Waiting until timeout for monitored process [2022-11-03 04:01:49,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:49,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:01:49,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:50,033 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 116 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 04:01:50,033 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:01:50,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1218682877] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:01:50,034 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:01:50,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 16 [2022-11-03 04:01:50,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949145032] [2022-11-03 04:01:50,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:01:50,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:01:50,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:01:50,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:01:50,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2022-11-03 04:01:50,035 INFO L87 Difference]: Start difference. First operand 664 states and 910 transitions. Second operand has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 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 04:01:50,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:01:50,289 INFO L93 Difference]: Finished difference Result 1426 states and 2027 transitions. [2022-11-03 04:01:50,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:01:50,290 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 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) Word has length 243 [2022-11-03 04:01:50,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:01:50,291 INFO L225 Difference]: With dead ends: 1426 [2022-11-03 04:01:50,291 INFO L226 Difference]: Without dead ends: 993 [2022-11-03 04:01:50,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 732 GetRequests, 715 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-11-03 04:01:50,292 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 859 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 859 SdHoareTripleChecker+Valid, 577 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:01:50,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [859 Valid, 577 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:01:50,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 993 states. [2022-11-03 04:01:50,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 993 to 636. [2022-11-03 04:01:50,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 636 states, 635 states have (on average 1.3716535433070867) internal successors, (871), 635 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:50,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 871 transitions. [2022-11-03 04:01:50,309 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 871 transitions. Word has length 243 [2022-11-03 04:01:50,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:01:50,309 INFO L495 AbstractCegarLoop]: Abstraction has 636 states and 871 transitions. [2022-11-03 04:01:50,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 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 04:01:50,309 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 871 transitions. [2022-11-03 04:01:50,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-11-03 04:01:50,311 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:01:50,311 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:01:50,316 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (69)] Ended with exit code 0 [2022-11-03 04:01:50,527 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (68)] Ended with exit code 0 [2022-11-03 04:01:50,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:01:50,712 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:01:50,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:01:50,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1737015285, now seen corresponding path program 1 times [2022-11-03 04:01:50,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:01:50,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1182390669] [2022-11-03 04:01:50,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:50,716 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:01:50,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:01:50,717 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:01:50,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (70)] Waiting until timeout for monitored process [2022-11-03 04:01:51,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:51,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 04:01:51,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:51,731 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 119 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:01:51,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:01:52,232 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 119 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:01:52,232 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:01:52,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1182390669] [2022-11-03 04:01:52,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1182390669] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:01:52,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1986796842] [2022-11-03 04:01:52,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:52,233 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:01:52,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:01:52,234 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:01:52,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (71)] Waiting until timeout for monitored process [2022-11-03 04:01:53,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:53,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:01:53,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:53,117 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 116 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 04:01:53,117 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:01:53,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1986796842] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:01:53,118 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:01:53,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 16 [2022-11-03 04:01:53,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112474092] [2022-11-03 04:01:53,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:01:53,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:01:53,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:01:53,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:01:53,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2022-11-03 04:01:53,120 INFO L87 Difference]: Start difference. First operand 636 states and 871 transitions. Second operand has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 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 04:01:53,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:01:53,345 INFO L93 Difference]: Finished difference Result 1167 states and 1642 transitions. [2022-11-03 04:01:53,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:01:53,346 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 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) Word has length 243 [2022-11-03 04:01:53,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:01:53,347 INFO L225 Difference]: With dead ends: 1167 [2022-11-03 04:01:53,347 INFO L226 Difference]: Without dead ends: 762 [2022-11-03 04:01:53,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 732 GetRequests, 715 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-11-03 04:01:53,348 INFO L413 NwaCegarLoop]: 296 mSDtfsCounter, 510 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 510 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:01:53,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [510 Valid, 616 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:01:53,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2022-11-03 04:01:53,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 636. [2022-11-03 04:01:53,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 636 states, 635 states have (on average 1.368503937007874) internal successors, (869), 635 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:53,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 869 transitions. [2022-11-03 04:01:53,363 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 869 transitions. Word has length 243 [2022-11-03 04:01:53,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:01:53,364 INFO L495 AbstractCegarLoop]: Abstraction has 636 states and 869 transitions. [2022-11-03 04:01:53,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 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 04:01:53,364 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 869 transitions. [2022-11-03 04:01:53,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-11-03 04:01:53,366 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:01:53,367 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:01:53,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (70)] Forceful destruction successful, exit code 0 [2022-11-03 04:01:53,585 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (71)] Ended with exit code 0 [2022-11-03 04:01:53,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:01:53,781 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:01:53,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:01:53,782 INFO L85 PathProgramCache]: Analyzing trace with hash 1519367437, now seen corresponding path program 1 times [2022-11-03 04:01:53,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:01:53,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1894995683] [2022-11-03 04:01:53,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:53,783 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:01:53,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:01:53,784 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:01:53,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (72)] Waiting until timeout for monitored process [2022-11-03 04:01:54,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:54,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 04:01:54,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:54,787 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 119 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:01:54,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:01:55,258 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 119 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:01:55,259 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:01:55,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1894995683] [2022-11-03 04:01:55,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1894995683] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:01:55,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1681952918] [2022-11-03 04:01:55,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:55,260 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:01:55,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:01:55,261 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:01:55,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (73)] Waiting until timeout for monitored process [2022-11-03 04:01:56,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:56,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:01:56,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:56,216 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 116 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 04:01:56,216 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:01:56,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1681952918] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:01:56,217 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:01:56,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 16 [2022-11-03 04:01:56,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327226035] [2022-11-03 04:01:56,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:01:56,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:01:56,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:01:56,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:01:56,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2022-11-03 04:01:56,219 INFO L87 Difference]: Start difference. First operand 636 states and 869 transitions. Second operand has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 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 04:01:56,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:01:56,447 INFO L93 Difference]: Finished difference Result 1179 states and 1653 transitions. [2022-11-03 04:01:56,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:01:56,447 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 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) Word has length 243 [2022-11-03 04:01:56,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:01:56,448 INFO L225 Difference]: With dead ends: 1179 [2022-11-03 04:01:56,448 INFO L226 Difference]: Without dead ends: 774 [2022-11-03 04:01:56,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 732 GetRequests, 715 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-11-03 04:01:56,449 INFO L413 NwaCegarLoop]: 303 mSDtfsCounter, 505 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 505 SdHoareTripleChecker+Valid, 631 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:01:56,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [505 Valid, 631 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:01:56,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2022-11-03 04:01:56,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 636. [2022-11-03 04:01:56,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 636 states, 635 states have (on average 1.3653543307086615) internal successors, (867), 635 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:56,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 867 transitions. [2022-11-03 04:01:56,466 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 867 transitions. Word has length 243 [2022-11-03 04:01:56,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:01:56,466 INFO L495 AbstractCegarLoop]: Abstraction has 636 states and 867 transitions. [2022-11-03 04:01:56,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 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 04:01:56,466 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 867 transitions. [2022-11-03 04:01:56,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-11-03 04:01:56,468 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:01:56,469 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:01:56,474 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (73)] Forceful destruction successful, exit code 0 [2022-11-03 04:01:56,689 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (72)] Ended with exit code 0 [2022-11-03 04:01:56,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:01:56,874 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:01:56,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:01:56,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1637808911, now seen corresponding path program 1 times [2022-11-03 04:01:56,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:01:56,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1687601578] [2022-11-03 04:01:56,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:56,876 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:01:56,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:01:56,877 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:01:56,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (74)] Waiting until timeout for monitored process [2022-11-03 04:01:57,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:57,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 04:01:57,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:58,021 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 119 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:01:58,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:01:58,493 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 119 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:01:58,493 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:01:58,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1687601578] [2022-11-03 04:01:58,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1687601578] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:01:58,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [509481356] [2022-11-03 04:01:58,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:58,494 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:01:58,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:01:58,495 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:01:58,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (75)] Waiting until timeout for monitored process [2022-11-03 04:01:59,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:59,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:01:59,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:59,385 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 116 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 04:01:59,386 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:01:59,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [509481356] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:01:59,386 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:01:59,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 16 [2022-11-03 04:01:59,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840356128] [2022-11-03 04:01:59,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:01:59,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:01:59,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:01:59,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:01:59,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2022-11-03 04:01:59,388 INFO L87 Difference]: Start difference. First operand 636 states and 867 transitions. Second operand has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 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 04:01:59,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:01:59,663 INFO L93 Difference]: Finished difference Result 1209 states and 1689 transitions. [2022-11-03 04:01:59,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:01:59,664 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 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) Word has length 243 [2022-11-03 04:01:59,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:01:59,665 INFO L225 Difference]: With dead ends: 1209 [2022-11-03 04:01:59,665 INFO L226 Difference]: Without dead ends: 804 [2022-11-03 04:01:59,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 732 GetRequests, 715 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-11-03 04:01:59,666 INFO L413 NwaCegarLoop]: 325 mSDtfsCounter, 494 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 676 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:01:59,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [494 Valid, 676 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:01:59,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 804 states. [2022-11-03 04:01:59,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 804 to 636. [2022-11-03 04:01:59,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 636 states, 635 states have (on average 1.3622047244094488) internal successors, (865), 635 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:59,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 865 transitions. [2022-11-03 04:01:59,689 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 865 transitions. Word has length 243 [2022-11-03 04:01:59,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:01:59,690 INFO L495 AbstractCegarLoop]: Abstraction has 636 states and 865 transitions. [2022-11-03 04:01:59,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 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 04:01:59,690 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 865 transitions. [2022-11-03 04:01:59,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-11-03 04:01:59,692 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:01:59,692 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:01:59,698 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (75)] Forceful destruction successful, exit code 0 [2022-11-03 04:01:59,912 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (74)] Ended with exit code 0 [2022-11-03 04:02:00,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:02:00,098 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:00,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:00,099 INFO L85 PathProgramCache]: Analyzing trace with hash -1305773167, now seen corresponding path program 1 times [2022-11-03 04:02:00,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:02:00,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [208810917] [2022-11-03 04:02:00,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:00,100 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:02:00,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:02:00,101 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:02:00,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (76)] Waiting until timeout for monitored process [2022-11-03 04:02:00,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:00,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 04:02:00,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:01,106 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 119 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:02:01,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:02:01,580 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 119 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:02:01,580 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:02:01,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [208810917] [2022-11-03 04:02:01,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [208810917] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:02:01,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1749515194] [2022-11-03 04:02:01,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:01,581 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:02:01,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:02:01,584 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:02:01,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (77)] Waiting until timeout for monitored process [2022-11-03 04:02:02,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:02,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:02:02,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:02,492 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 116 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 04:02:02,492 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:02:02,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1749515194] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:02,492 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:02:02,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 16 [2022-11-03 04:02:02,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530966125] [2022-11-03 04:02:02,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:02,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:02:02,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:02:02,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:02:02,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2022-11-03 04:02:02,494 INFO L87 Difference]: Start difference. First operand 636 states and 865 transitions. Second operand has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 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 04:02:02,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:02,727 INFO L93 Difference]: Finished difference Result 1221 states and 1700 transitions. [2022-11-03 04:02:02,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:02:02,727 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 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) Word has length 243 [2022-11-03 04:02:02,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:02,728 INFO L225 Difference]: With dead ends: 1221 [2022-11-03 04:02:02,728 INFO L226 Difference]: Without dead ends: 816 [2022-11-03 04:02:02,729 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 732 GetRequests, 715 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-11-03 04:02:02,729 INFO L413 NwaCegarLoop]: 332 mSDtfsCounter, 489 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 489 SdHoareTripleChecker+Valid, 691 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:02,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [489 Valid, 691 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:02:02,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 816 states. [2022-11-03 04:02:02,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 816 to 636. [2022-11-03 04:02:02,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 636 states, 635 states have (on average 1.3590551181102362) internal successors, (863), 635 states have internal predecessors, (863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:02,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 863 transitions. [2022-11-03 04:02:02,744 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 863 transitions. Word has length 243 [2022-11-03 04:02:02,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:02,744 INFO L495 AbstractCegarLoop]: Abstraction has 636 states and 863 transitions. [2022-11-03 04:02:02,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 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 04:02:02,745 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 863 transitions. [2022-11-03 04:02:02,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-11-03 04:02:02,746 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:02,747 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:02:02,769 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (76)] Ended with exit code 0 [2022-11-03 04:02:02,972 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (77)] Ended with exit code 0 [2022-11-03 04:02:03,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:02:03,168 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:03,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:03,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1048612115, now seen corresponding path program 1 times [2022-11-03 04:02:03,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:02:03,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1609922864] [2022-11-03 04:02:03,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:03,170 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:02:03,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:02:03,171 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:02:03,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (78)] Waiting until timeout for monitored process [2022-11-03 04:02:03,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:03,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 04:02:03,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:04,321 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 119 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:02:04,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:02:04,808 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 119 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:02:04,808 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:02:04,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1609922864] [2022-11-03 04:02:04,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1609922864] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:02:04,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [830168554] [2022-11-03 04:02:04,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:04,809 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:02:04,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:02:04,817 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:02:04,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (79)] Waiting until timeout for monitored process [2022-11-03 04:02:05,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:05,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:02:05,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:05,739 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 116 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 04:02:05,739 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:02:05,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [830168554] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:05,739 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:02:05,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 16 [2022-11-03 04:02:05,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186129478] [2022-11-03 04:02:05,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:05,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:02:05,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:02:05,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:02:05,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2022-11-03 04:02:05,741 INFO L87 Difference]: Start difference. First operand 636 states and 863 transitions. Second operand has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 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 04:02:06,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:06,024 INFO L93 Difference]: Finished difference Result 1519 states and 2123 transitions. [2022-11-03 04:02:06,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:02:06,025 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 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) Word has length 243 [2022-11-03 04:02:06,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:06,026 INFO L225 Difference]: With dead ends: 1519 [2022-11-03 04:02:06,026 INFO L226 Difference]: Without dead ends: 1114 [2022-11-03 04:02:06,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 732 GetRequests, 715 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-11-03 04:02:06,027 INFO L413 NwaCegarLoop]: 433 mSDtfsCounter, 489 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 489 SdHoareTripleChecker+Valid, 896 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:06,027 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [489 Valid, 896 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:02:06,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2022-11-03 04:02:06,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 638. [2022-11-03 04:02:06,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 638 states, 637 states have (on average 1.3563579277864992) internal successors, (864), 637 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:06,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 864 transitions. [2022-11-03 04:02:06,048 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 864 transitions. Word has length 243 [2022-11-03 04:02:06,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:06,048 INFO L495 AbstractCegarLoop]: Abstraction has 638 states and 864 transitions. [2022-11-03 04:02:06,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 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 04:02:06,048 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 864 transitions. [2022-11-03 04:02:06,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-11-03 04:02:06,050 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:06,051 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:02:06,057 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (79)] Forceful destruction successful, exit code 0 [2022-11-03 04:02:06,270 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (78)] Ended with exit code 0 [2022-11-03 04:02:06,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:02:06,456 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:06,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:06,457 INFO L85 PathProgramCache]: Analyzing trace with hash 277878549, now seen corresponding path program 1 times [2022-11-03 04:02:06,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:02:06,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1028266304] [2022-11-03 04:02:06,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:06,458 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:02:06,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:02:06,459 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:02:06,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (80)] Waiting until timeout for monitored process [2022-11-03 04:02:07,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:07,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 04:02:07,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:07,577 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 119 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:02:07,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:02:08,046 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 119 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:02:08,046 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:02:08,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1028266304] [2022-11-03 04:02:08,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1028266304] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:02:08,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1744095425] [2022-11-03 04:02:08,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:08,047 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:02:08,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:02:08,048 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:02:08,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (81)] Waiting until timeout for monitored process [2022-11-03 04:02:08,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:08,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:02:08,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:08,994 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 116 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 04:02:08,994 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:02:08,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1744095425] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:08,994 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:02:08,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 16 [2022-11-03 04:02:08,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285505378] [2022-11-03 04:02:08,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:08,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:02:08,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:02:08,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:02:08,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2022-11-03 04:02:08,996 INFO L87 Difference]: Start difference. First operand 638 states and 864 transitions. Second operand has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 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 04:02:09,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:09,287 INFO L93 Difference]: Finished difference Result 1529 states and 2133 transitions. [2022-11-03 04:02:09,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:02:09,288 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 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) Word has length 243 [2022-11-03 04:02:09,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:09,290 INFO L225 Difference]: With dead ends: 1529 [2022-11-03 04:02:09,290 INFO L226 Difference]: Without dead ends: 1122 [2022-11-03 04:02:09,291 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 732 GetRequests, 715 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-11-03 04:02:09,291 INFO L413 NwaCegarLoop]: 442 mSDtfsCounter, 480 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 480 SdHoareTripleChecker+Valid, 915 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:09,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [480 Valid, 915 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:02:09,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1122 states. [2022-11-03 04:02:09,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1122 to 646. [2022-11-03 04:02:09,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 645 states have (on average 1.3550387596899225) internal successors, (874), 645 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:09,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 874 transitions. [2022-11-03 04:02:09,311 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 874 transitions. Word has length 243 [2022-11-03 04:02:09,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:09,312 INFO L495 AbstractCegarLoop]: Abstraction has 646 states and 874 transitions. [2022-11-03 04:02:09,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 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 04:02:09,312 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 874 transitions. [2022-11-03 04:02:09,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-11-03 04:02:09,313 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:09,314 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:02:09,318 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (81)] Ended with exit code 0 [2022-11-03 04:02:09,529 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (80)] Ended with exit code 0 [2022-11-03 04:02:09,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:02:09,714 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:09,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:09,715 INFO L85 PathProgramCache]: Analyzing trace with hash -779959529, now seen corresponding path program 1 times [2022-11-03 04:02:09,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:02:09,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [469505112] [2022-11-03 04:02:09,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:09,716 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:02:09,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:02:09,717 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:02:09,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (82)] Waiting until timeout for monitored process [2022-11-03 04:02:10,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:10,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 04:02:10,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:10,713 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 119 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:02:10,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:02:11,243 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 119 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:02:11,244 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:02:11,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [469505112] [2022-11-03 04:02:11,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [469505112] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:02:11,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2098632465] [2022-11-03 04:02:11,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:11,245 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:02:11,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:02:11,247 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:02:11,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (83)] Waiting until timeout for monitored process [2022-11-03 04:02:12,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:12,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:02:12,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:12,173 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 116 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 04:02:12,173 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:02:12,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2098632465] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:12,173 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:02:12,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 16 [2022-11-03 04:02:12,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282084181] [2022-11-03 04:02:12,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:12,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:02:12,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:02:12,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:02:12,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2022-11-03 04:02:12,175 INFO L87 Difference]: Start difference. First operand 646 states and 874 transitions. Second operand has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 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 04:02:12,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:12,460 INFO L93 Difference]: Finished difference Result 1543 states and 2148 transitions. [2022-11-03 04:02:12,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:02:12,461 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 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) Word has length 243 [2022-11-03 04:02:12,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:12,462 INFO L225 Difference]: With dead ends: 1543 [2022-11-03 04:02:12,462 INFO L226 Difference]: Without dead ends: 1128 [2022-11-03 04:02:12,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 732 GetRequests, 715 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-11-03 04:02:12,463 INFO L413 NwaCegarLoop]: 448 mSDtfsCounter, 473 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 473 SdHoareTripleChecker+Valid, 928 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:12,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [473 Valid, 928 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:02:12,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1128 states. [2022-11-03 04:02:12,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1128 to 652. [2022-11-03 04:02:12,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 652 states, 651 states have (on average 1.3533026113671276) internal successors, (881), 651 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:12,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 881 transitions. [2022-11-03 04:02:12,478 INFO L78 Accepts]: Start accepts. Automaton has 652 states and 881 transitions. Word has length 243 [2022-11-03 04:02:12,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:12,479 INFO L495 AbstractCegarLoop]: Abstraction has 652 states and 881 transitions. [2022-11-03 04:02:12,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 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 04:02:12,479 INFO L276 IsEmpty]: Start isEmpty. Operand 652 states and 881 transitions. [2022-11-03 04:02:12,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-11-03 04:02:12,481 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:12,481 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:02:12,496 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (82)] Ended with exit code 0 [2022-11-03 04:02:12,685 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (83)] Ended with exit code 0 [2022-11-03 04:02:12,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:02:12,882 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:12,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:12,882 INFO L85 PathProgramCache]: Analyzing trace with hash 954144921, now seen corresponding path program 1 times [2022-11-03 04:02:12,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:02:12,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1699818273] [2022-11-03 04:02:12,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:12,884 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:02:12,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:02:12,885 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:02:12,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (84)] Waiting until timeout for monitored process [2022-11-03 04:02:13,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:13,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 04:02:13,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:13,887 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 119 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:02:13,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:02:14,354 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 119 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:02:14,354 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:02:14,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1699818273] [2022-11-03 04:02:14,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1699818273] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:02:14,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1683224078] [2022-11-03 04:02:14,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:14,355 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:02:14,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:02:14,356 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:02:14,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (85)] Waiting until timeout for monitored process [2022-11-03 04:02:15,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:15,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:02:15,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:15,295 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 116 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 04:02:15,295 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:02:15,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1683224078] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:15,295 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:02:15,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 16 [2022-11-03 04:02:15,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081734260] [2022-11-03 04:02:15,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:15,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:02:15,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:02:15,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:02:15,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2022-11-03 04:02:15,297 INFO L87 Difference]: Start difference. First operand 652 states and 881 transitions. Second operand has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 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 04:02:15,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:15,591 INFO L93 Difference]: Finished difference Result 1555 states and 2162 transitions. [2022-11-03 04:02:15,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:02:15,591 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 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) Word has length 243 [2022-11-03 04:02:15,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:15,593 INFO L225 Difference]: With dead ends: 1555 [2022-11-03 04:02:15,593 INFO L226 Difference]: Without dead ends: 1134 [2022-11-03 04:02:15,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 732 GetRequests, 715 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-11-03 04:02:15,594 INFO L413 NwaCegarLoop]: 454 mSDtfsCounter, 465 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 465 SdHoareTripleChecker+Valid, 939 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:15,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [465 Valid, 939 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:02:15,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1134 states. [2022-11-03 04:02:15,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1134 to 658. [2022-11-03 04:02:15,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 658 states, 657 states have (on average 1.3515981735159817) internal successors, (888), 657 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:15,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 888 transitions. [2022-11-03 04:02:15,612 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 888 transitions. Word has length 243 [2022-11-03 04:02:15,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:15,612 INFO L495 AbstractCegarLoop]: Abstraction has 658 states and 888 transitions. [2022-11-03 04:02:15,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 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 04:02:15,612 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 888 transitions. [2022-11-03 04:02:15,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-11-03 04:02:15,613 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:15,613 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:02:15,618 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (85)] Ended with exit code 0 [2022-11-03 04:02:15,832 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (84)] Ended with exit code 0 [2022-11-03 04:02:16,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:02:16,017 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:16,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:16,018 INFO L85 PathProgramCache]: Analyzing trace with hash 461518747, now seen corresponding path program 1 times [2022-11-03 04:02:16,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:02:16,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1883866765] [2022-11-03 04:02:16,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:16,019 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:02:16,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:02:16,020 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:02:16,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (86)] Waiting until timeout for monitored process [2022-11-03 04:02:16,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:16,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 04:02:16,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:17,015 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 119 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:02:17,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:02:17,491 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 119 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:02:17,491 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:02:17,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1883866765] [2022-11-03 04:02:17,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1883866765] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:02:17,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1965549451] [2022-11-03 04:02:17,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:17,492 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:02:17,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:02:17,493 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:02:17,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (87)] Waiting until timeout for monitored process [2022-11-03 04:02:18,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:18,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:02:18,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:18,431 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 116 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 04:02:18,431 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:02:18,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1965549451] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:18,432 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:02:18,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 16 [2022-11-03 04:02:18,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258540635] [2022-11-03 04:02:18,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:18,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:02:18,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:02:18,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:02:18,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2022-11-03 04:02:18,434 INFO L87 Difference]: Start difference. First operand 658 states and 888 transitions. Second operand has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 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 04:02:18,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:18,728 INFO L93 Difference]: Finished difference Result 1565 states and 2171 transitions. [2022-11-03 04:02:18,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:02:18,729 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 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) Word has length 243 [2022-11-03 04:02:18,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:18,731 INFO L225 Difference]: With dead ends: 1565 [2022-11-03 04:02:18,731 INFO L226 Difference]: Without dead ends: 1138 [2022-11-03 04:02:18,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 732 GetRequests, 715 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-11-03 04:02:18,732 INFO L413 NwaCegarLoop]: 457 mSDtfsCounter, 460 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 460 SdHoareTripleChecker+Valid, 946 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:18,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [460 Valid, 946 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:02:18,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1138 states. [2022-11-03 04:02:18,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1138 to 662. [2022-11-03 04:02:18,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 661 states have (on average 1.3494704992435704) internal successors, (892), 661 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:18,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 892 transitions. [2022-11-03 04:02:18,757 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 892 transitions. Word has length 243 [2022-11-03 04:02:18,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:18,758 INFO L495 AbstractCegarLoop]: Abstraction has 662 states and 892 transitions. [2022-11-03 04:02:18,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 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 04:02:18,758 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 892 transitions. [2022-11-03 04:02:18,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-11-03 04:02:18,759 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:18,759 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:02:18,763 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (87)] Forceful destruction successful, exit code 0 [2022-11-03 04:02:18,983 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (86)] Forceful destruction successful, exit code 0 [2022-11-03 04:02:19,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:02:19,165 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:19,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:19,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1224661091, now seen corresponding path program 1 times [2022-11-03 04:02:19,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:02:19,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2086476744] [2022-11-03 04:02:19,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:19,167 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:02:19,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:02:19,168 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:02:19,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (88)] Waiting until timeout for monitored process [2022-11-03 04:02:19,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:19,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 04:02:19,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:20,178 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 119 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:02:20,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:02:20,664 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 119 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:02:20,665 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:02:20,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2086476744] [2022-11-03 04:02:20,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2086476744] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:02:20,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [231905760] [2022-11-03 04:02:20,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:20,666 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:02:20,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:02:20,669 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:02:20,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (89)] Waiting until timeout for monitored process [2022-11-03 04:02:21,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:21,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:02:21,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:21,709 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 116 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 04:02:21,709 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:02:21,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [231905760] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:21,709 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:02:21,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 16 [2022-11-03 04:02:21,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662075309] [2022-11-03 04:02:21,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:21,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:02:21,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:02:21,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:02:21,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2022-11-03 04:02:21,711 INFO L87 Difference]: Start difference. First operand 662 states and 892 transitions. Second operand has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 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 04:02:22,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:22,010 INFO L93 Difference]: Finished difference Result 1573 states and 2177 transitions. [2022-11-03 04:02:22,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:02:22,011 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 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) Word has length 243 [2022-11-03 04:02:22,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:22,014 INFO L225 Difference]: With dead ends: 1573 [2022-11-03 04:02:22,014 INFO L226 Difference]: Without dead ends: 1142 [2022-11-03 04:02:22,015 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 732 GetRequests, 715 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-11-03 04:02:22,016 INFO L413 NwaCegarLoop]: 460 mSDtfsCounter, 455 mSDsluCounter, 493 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 455 SdHoareTripleChecker+Valid, 953 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:22,016 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [455 Valid, 953 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:02:22,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1142 states. [2022-11-03 04:02:22,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1142 to 666. [2022-11-03 04:02:22,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 665 states have (on average 1.3473684210526315) internal successors, (896), 665 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:22,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 896 transitions. [2022-11-03 04:02:22,042 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 896 transitions. Word has length 243 [2022-11-03 04:02:22,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:22,043 INFO L495 AbstractCegarLoop]: Abstraction has 666 states and 896 transitions. [2022-11-03 04:02:22,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 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 04:02:22,043 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 896 transitions. [2022-11-03 04:02:22,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-11-03 04:02:22,045 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:22,045 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:02:22,051 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (89)] Forceful destruction successful, exit code 0 [2022-11-03 04:02:22,265 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (88)] Forceful destruction successful, exit code 0 [2022-11-03 04:02:22,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:02:22,451 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:22,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:22,451 INFO L85 PathProgramCache]: Analyzing trace with hash 736913567, now seen corresponding path program 1 times [2022-11-03 04:02:22,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:02:22,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2072274762] [2022-11-03 04:02:22,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:22,452 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:02:22,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:02:22,453 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:02:22,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (90)] Waiting until timeout for monitored process [2022-11-03 04:02:22,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:22,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 04:02:22,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:23,455 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 119 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:02:23,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:02:23,924 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 119 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:02:23,924 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:02:23,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2072274762] [2022-11-03 04:02:23,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2072274762] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:02:23,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [185122519] [2022-11-03 04:02:23,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:23,925 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:02:23,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:02:23,926 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:02:23,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (91)] Waiting until timeout for monitored process [2022-11-03 04:02:24,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:24,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:02:24,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:24,875 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 116 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 04:02:24,875 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:02:24,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [185122519] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:24,875 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:02:24,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 16 [2022-11-03 04:02:24,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782927458] [2022-11-03 04:02:24,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:24,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:02:24,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:02:24,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:02:24,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2022-11-03 04:02:24,877 INFO L87 Difference]: Start difference. First operand 666 states and 896 transitions. Second operand has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 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 04:02:25,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:25,180 INFO L93 Difference]: Finished difference Result 1579 states and 2180 transitions. [2022-11-03 04:02:25,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:02:25,181 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 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) Word has length 243 [2022-11-03 04:02:25,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:25,182 INFO L225 Difference]: With dead ends: 1579 [2022-11-03 04:02:25,182 INFO L226 Difference]: Without dead ends: 1144 [2022-11-03 04:02:25,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 732 GetRequests, 715 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-11-03 04:02:25,183 INFO L413 NwaCegarLoop]: 460 mSDtfsCounter, 452 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 954 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:25,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [452 Valid, 954 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:02:25,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1144 states. [2022-11-03 04:02:25,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1144 to 668. [2022-11-03 04:02:25,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 668 states, 667 states have (on average 1.3448275862068966) internal successors, (897), 667 states have internal predecessors, (897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:25,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 897 transitions. [2022-11-03 04:02:25,203 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 897 transitions. Word has length 243 [2022-11-03 04:02:25,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:25,204 INFO L495 AbstractCegarLoop]: Abstraction has 668 states and 897 transitions. [2022-11-03 04:02:25,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 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 04:02:25,204 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 897 transitions. [2022-11-03 04:02:25,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-11-03 04:02:25,206 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:25,206 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:02:25,212 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (91)] Forceful destruction successful, exit code 0 [2022-11-03 04:02:25,427 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (90)] Forceful destruction successful, exit code 0 [2022-11-03 04:02:25,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:02:25,612 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:25,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:25,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1297613345, now seen corresponding path program 1 times [2022-11-03 04:02:25,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:02:25,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [745680956] [2022-11-03 04:02:25,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:25,614 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:02:25,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:02:25,615 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:02:25,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (92)] Waiting until timeout for monitored process [2022-11-03 04:02:26,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:26,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 04:02:26,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:26,613 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 119 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:02:26,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:02:27,083 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 119 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:02:27,083 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:02:27,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [745680956] [2022-11-03 04:02:27,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [745680956] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:02:27,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [177472500] [2022-11-03 04:02:27,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:27,084 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:02:27,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:02:27,085 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:02:27,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (93)] Waiting until timeout for monitored process [2022-11-03 04:02:27,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:27,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:02:27,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:28,030 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 116 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 04:02:28,030 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:02:28,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [177472500] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:28,031 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:02:28,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 16 [2022-11-03 04:02:28,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483581469] [2022-11-03 04:02:28,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:28,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:02:28,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:02:28,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:02:28,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2022-11-03 04:02:28,032 INFO L87 Difference]: Start difference. First operand 668 states and 897 transitions. Second operand has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 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 04:02:28,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:28,332 INFO L93 Difference]: Finished difference Result 1583 states and 2180 transitions. [2022-11-03 04:02:28,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:02:28,332 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 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) Word has length 243 [2022-11-03 04:02:28,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:28,334 INFO L225 Difference]: With dead ends: 1583 [2022-11-03 04:02:28,334 INFO L226 Difference]: Without dead ends: 1146 [2022-11-03 04:02:28,335 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 732 GetRequests, 715 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-11-03 04:02:28,335 INFO L413 NwaCegarLoop]: 460 mSDtfsCounter, 449 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 449 SdHoareTripleChecker+Valid, 955 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:28,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [449 Valid, 955 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:02:28,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1146 states. [2022-11-03 04:02:28,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1146 to 670. [2022-11-03 04:02:28,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 669 states have (on average 1.3423019431988041) internal successors, (898), 669 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:28,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 898 transitions. [2022-11-03 04:02:28,362 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 898 transitions. Word has length 243 [2022-11-03 04:02:28,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:28,362 INFO L495 AbstractCegarLoop]: Abstraction has 670 states and 898 transitions. [2022-11-03 04:02:28,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 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 04:02:28,363 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 898 transitions. [2022-11-03 04:02:28,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-11-03 04:02:28,365 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:28,365 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:02:28,370 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (93)] Ended with exit code 0 [2022-11-03 04:02:28,583 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (92)] Ended with exit code 0 [2022-11-03 04:02:28,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:02:28,769 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:28,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:28,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1736436701, now seen corresponding path program 1 times [2022-11-03 04:02:28,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:02:28,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1024083738] [2022-11-03 04:02:28,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:28,771 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:02:28,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:02:28,772 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:02:28,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (94)] Waiting until timeout for monitored process [2022-11-03 04:02:29,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:29,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 04:02:29,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:29,769 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 119 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:02:29,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:02:30,275 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 119 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:02:30,276 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:02:30,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1024083738] [2022-11-03 04:02:30,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1024083738] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:02:30,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [173759533] [2022-11-03 04:02:30,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:30,276 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:02:30,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:02:30,277 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:02:30,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (95)] Waiting until timeout for monitored process [2022-11-03 04:02:31,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:31,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:02:31,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:31,217 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 116 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 04:02:31,218 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:02:31,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [173759533] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:31,218 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:02:31,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 16 [2022-11-03 04:02:31,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356347039] [2022-11-03 04:02:31,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:31,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:02:31,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:02:31,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:02:31,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2022-11-03 04:02:31,220 INFO L87 Difference]: Start difference. First operand 670 states and 898 transitions. Second operand has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 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 04:02:31,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:31,524 INFO L93 Difference]: Finished difference Result 1591 states and 2187 transitions. [2022-11-03 04:02:31,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:02:31,525 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 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) Word has length 243 [2022-11-03 04:02:31,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:31,526 INFO L225 Difference]: With dead ends: 1591 [2022-11-03 04:02:31,526 INFO L226 Difference]: Without dead ends: 1152 [2022-11-03 04:02:31,527 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 732 GetRequests, 715 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-11-03 04:02:31,528 INFO L413 NwaCegarLoop]: 466 mSDtfsCounter, 441 mSDsluCounter, 500 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 441 SdHoareTripleChecker+Valid, 966 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:31,528 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [441 Valid, 966 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:02:31,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1152 states. [2022-11-03 04:02:31,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1152 to 676. [2022-11-03 04:02:31,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 676 states, 675 states have (on average 1.3407407407407408) internal successors, (905), 675 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:31,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 676 states to 676 states and 905 transitions. [2022-11-03 04:02:31,549 INFO L78 Accepts]: Start accepts. Automaton has 676 states and 905 transitions. Word has length 243 [2022-11-03 04:02:31,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:31,549 INFO L495 AbstractCegarLoop]: Abstraction has 676 states and 905 transitions. [2022-11-03 04:02:31,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 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 04:02:31,550 INFO L276 IsEmpty]: Start isEmpty. Operand 676 states and 905 transitions. [2022-11-03 04:02:31,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-11-03 04:02:31,552 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:31,552 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:02:31,556 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (95)] Ended with exit code 0 [2022-11-03 04:02:31,767 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (94)] Ended with exit code 0 [2022-11-03 04:02:31,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,94 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:02:31,953 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:31,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:31,953 INFO L85 PathProgramCache]: Analyzing trace with hash 529944485, now seen corresponding path program 1 times [2022-11-03 04:02:31,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:02:31,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [99964271] [2022-11-03 04:02:31,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:31,955 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:02:31,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:02:31,956 INFO L229 MonitoredProcess]: Starting monitored process 96 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:02:31,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (96)] Waiting until timeout for monitored process [2022-11-03 04:02:32,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:32,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 04:02:32,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:32,972 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 119 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:02:32,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:02:33,496 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 119 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:02:33,496 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:02:33,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [99964271] [2022-11-03 04:02:33,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [99964271] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:02:33,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [125986811] [2022-11-03 04:02:33,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:33,497 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:02:33,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:02:33,498 INFO L229 MonitoredProcess]: Starting monitored process 97 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:02:33,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (97)] Waiting until timeout for monitored process [2022-11-03 04:02:34,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:34,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:02:34,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:34,438 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 116 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 04:02:34,438 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:02:34,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [125986811] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:34,439 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:02:34,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 16 [2022-11-03 04:02:34,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467855924] [2022-11-03 04:02:34,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:34,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:02:34,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:02:34,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:02:34,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2022-11-03 04:02:34,441 INFO L87 Difference]: Start difference. First operand 676 states and 905 transitions. Second operand has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 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 04:02:34,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:34,751 INFO L93 Difference]: Finished difference Result 1601 states and 2196 transitions. [2022-11-03 04:02:34,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:02:34,752 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 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) Word has length 243 [2022-11-03 04:02:34,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:34,753 INFO L225 Difference]: With dead ends: 1601 [2022-11-03 04:02:34,753 INFO L226 Difference]: Without dead ends: 1156 [2022-11-03 04:02:34,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 732 GetRequests, 715 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-11-03 04:02:34,754 INFO L413 NwaCegarLoop]: 469 mSDtfsCounter, 436 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 973 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:34,754 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [436 Valid, 973 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:02:34,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1156 states. [2022-11-03 04:02:34,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1156 to 680. [2022-11-03 04:02:34,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 680 states, 679 states have (on average 1.3387334315169366) internal successors, (909), 679 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:34,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 909 transitions. [2022-11-03 04:02:34,770 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 909 transitions. Word has length 243 [2022-11-03 04:02:34,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:34,771 INFO L495 AbstractCegarLoop]: Abstraction has 680 states and 909 transitions. [2022-11-03 04:02:34,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 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 04:02:34,771 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 909 transitions. [2022-11-03 04:02:34,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-11-03 04:02:34,772 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:34,773 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:02:34,793 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (96)] Ended with exit code 0 [2022-11-03 04:02:34,977 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (97)] Forceful destruction successful, exit code 0 [2022-11-03 04:02:35,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,97 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:02:35,173 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:35,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:35,174 INFO L85 PathProgramCache]: Analyzing trace with hash 176856103, now seen corresponding path program 1 times [2022-11-03 04:02:35,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:02:35,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [656023478] [2022-11-03 04:02:35,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:35,175 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:02:35,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:02:35,176 INFO L229 MonitoredProcess]: Starting monitored process 98 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:02:35,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (98)] Waiting until timeout for monitored process [2022-11-03 04:02:35,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:35,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 04:02:35,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:36,176 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 119 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:02:36,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:02:36,670 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 119 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:02:36,670 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:02:36,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [656023478] [2022-11-03 04:02:36,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [656023478] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:02:36,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [549428062] [2022-11-03 04:02:36,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:36,671 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:02:36,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:02:36,672 INFO L229 MonitoredProcess]: Starting monitored process 99 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:02:36,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (99)] Waiting until timeout for monitored process [2022-11-03 04:02:37,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:37,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:02:37,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:37,622 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 04:02:37,622 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:02:37,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [549428062] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:37,622 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:02:37,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 16 [2022-11-03 04:02:37,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533922883] [2022-11-03 04:02:37,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:37,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:02:37,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:02:37,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:02:37,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2022-11-03 04:02:37,624 INFO L87 Difference]: Start difference. First operand 680 states and 909 transitions. Second operand has 5 states, 5 states have (on average 46.6) internal successors, (233), 5 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:37,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:37,801 INFO L93 Difference]: Finished difference Result 2281 states and 3132 transitions. [2022-11-03 04:02:37,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 04:02:37,802 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 46.6) internal successors, (233), 5 states have internal predecessors, (233), 0 states have call successors, (0), 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 243 [2022-11-03 04:02:37,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:37,804 INFO L225 Difference]: With dead ends: 2281 [2022-11-03 04:02:37,804 INFO L226 Difference]: Without dead ends: 1832 [2022-11-03 04:02:37,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 732 GetRequests, 715 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-11-03 04:02:37,806 INFO L413 NwaCegarLoop]: 267 mSDtfsCounter, 923 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 923 SdHoareTripleChecker+Valid, 716 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:37,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [923 Valid, 716 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:02:37,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1832 states. [2022-11-03 04:02:37,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1832 to 944. [2022-11-03 04:02:37,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 944 states, 943 states have (on average 1.344644750795334) internal successors, (1268), 943 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:37,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 944 states to 944 states and 1268 transitions. [2022-11-03 04:02:37,832 INFO L78 Accepts]: Start accepts. Automaton has 944 states and 1268 transitions. Word has length 243 [2022-11-03 04:02:37,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:37,832 INFO L495 AbstractCegarLoop]: Abstraction has 944 states and 1268 transitions. [2022-11-03 04:02:37,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 46.6) internal successors, (233), 5 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:37,832 INFO L276 IsEmpty]: Start isEmpty. Operand 944 states and 1268 transitions. [2022-11-03 04:02:37,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-11-03 04:02:37,835 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:37,835 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:02:37,851 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (98)] Ended with exit code 0 [2022-11-03 04:02:38,041 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (99)] Ended with exit code 0 [2022-11-03 04:02:38,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,99 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:02:38,237 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:38,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:38,238 INFO L85 PathProgramCache]: Analyzing trace with hash 2022223269, now seen corresponding path program 1 times [2022-11-03 04:02:38,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:02:38,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [912036592] [2022-11-03 04:02:38,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:38,239 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:02:38,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:02:38,240 INFO L229 MonitoredProcess]: Starting monitored process 100 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:02:38,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (100)] Waiting until timeout for monitored process [2022-11-03 04:02:38,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:38,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 04:02:38,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:39,244 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 119 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:02:39,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:02:39,727 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 119 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:02:39,728 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:02:39,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [912036592] [2022-11-03 04:02:39,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [912036592] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:02:39,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [976196186] [2022-11-03 04:02:39,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:39,728 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:02:39,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:02:39,729 INFO L229 MonitoredProcess]: Starting monitored process 101 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:02:39,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (101)] Waiting until timeout for monitored process [2022-11-03 04:02:40,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:40,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:02:40,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:40,693 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 116 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 04:02:40,693 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:02:40,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [976196186] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:40,693 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:02:40,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 16 [2022-11-03 04:02:40,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307730976] [2022-11-03 04:02:40,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:40,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:02:40,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:02:40,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:02:40,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2022-11-03 04:02:40,695 INFO L87 Difference]: Start difference. First operand 944 states and 1268 transitions. Second operand has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 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 04:02:41,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:41,010 INFO L93 Difference]: Finished difference Result 2423 states and 3313 transitions. [2022-11-03 04:02:41,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:02:41,011 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 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) Word has length 243 [2022-11-03 04:02:41,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:41,012 INFO L225 Difference]: With dead ends: 2423 [2022-11-03 04:02:41,013 INFO L226 Difference]: Without dead ends: 1710 [2022-11-03 04:02:41,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 732 GetRequests, 715 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-11-03 04:02:41,014 INFO L413 NwaCegarLoop]: 481 mSDtfsCounter, 425 mSDsluCounter, 517 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 425 SdHoareTripleChecker+Valid, 998 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:41,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [425 Valid, 998 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:02:41,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1710 states. [2022-11-03 04:02:41,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1710 to 962. [2022-11-03 04:02:41,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 962 states, 961 states have (on average 1.3444328824141518) internal successors, (1292), 961 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:41,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 962 states to 962 states and 1292 transitions. [2022-11-03 04:02:41,035 INFO L78 Accepts]: Start accepts. Automaton has 962 states and 1292 transitions. Word has length 243 [2022-11-03 04:02:41,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:41,035 INFO L495 AbstractCegarLoop]: Abstraction has 962 states and 1292 transitions. [2022-11-03 04:02:41,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 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 04:02:41,036 INFO L276 IsEmpty]: Start isEmpty. Operand 962 states and 1292 transitions. [2022-11-03 04:02:41,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-11-03 04:02:41,037 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:41,038 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:02:41,061 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (100)] Ended with exit code 0 [2022-11-03 04:02:41,242 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (101)] Ended with exit code 0 [2022-11-03 04:02:41,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,101 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:02:41,438 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:41,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:41,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1613212505, now seen corresponding path program 1 times [2022-11-03 04:02:41,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:02:41,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [126018504] [2022-11-03 04:02:41,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:41,440 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:02:41,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:02:41,441 INFO L229 MonitoredProcess]: Starting monitored process 102 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:02:41,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (102)] Waiting until timeout for monitored process [2022-11-03 04:02:41,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:41,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 04:02:41,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:42,439 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 119 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:02:42,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:02:42,926 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 119 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:02:42,926 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:02:42,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [126018504] [2022-11-03 04:02:42,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [126018504] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:02:42,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [50252827] [2022-11-03 04:02:42,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:42,927 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:02:42,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:02:42,928 INFO L229 MonitoredProcess]: Starting monitored process 103 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:02:42,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (103)] Waiting until timeout for monitored process [2022-11-03 04:02:43,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:43,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:02:43,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:43,881 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 116 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 04:02:43,882 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:02:43,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [50252827] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:43,882 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:02:43,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 16 [2022-11-03 04:02:43,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986067769] [2022-11-03 04:02:43,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:43,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:02:43,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:02:43,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:02:43,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2022-11-03 04:02:43,884 INFO L87 Difference]: Start difference. First operand 962 states and 1292 transitions. Second operand has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 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 04:02:44,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:44,198 INFO L93 Difference]: Finished difference Result 2445 states and 3339 transitions. [2022-11-03 04:02:44,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:02:44,198 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 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) Word has length 243 [2022-11-03 04:02:44,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:44,200 INFO L225 Difference]: With dead ends: 2445 [2022-11-03 04:02:44,200 INFO L226 Difference]: Without dead ends: 1714 [2022-11-03 04:02:44,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 732 GetRequests, 715 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-11-03 04:02:44,202 INFO L413 NwaCegarLoop]: 484 mSDtfsCounter, 420 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 420 SdHoareTripleChecker+Valid, 1005 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:44,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [420 Valid, 1005 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:02:44,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1714 states. [2022-11-03 04:02:44,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1714 to 966. [2022-11-03 04:02:44,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 966 states, 965 states have (on average 1.3430051813471502) internal successors, (1296), 965 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:44,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 966 states to 966 states and 1296 transitions. [2022-11-03 04:02:44,222 INFO L78 Accepts]: Start accepts. Automaton has 966 states and 1296 transitions. Word has length 243 [2022-11-03 04:02:44,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:44,222 INFO L495 AbstractCegarLoop]: Abstraction has 966 states and 1296 transitions. [2022-11-03 04:02:44,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 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 04:02:44,222 INFO L276 IsEmpty]: Start isEmpty. Operand 966 states and 1296 transitions. [2022-11-03 04:02:44,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-11-03 04:02:44,223 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:44,224 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:02:44,228 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (103)] Forceful destruction successful, exit code 0 [2022-11-03 04:02:44,439 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (102)] Ended with exit code 0 [2022-11-03 04:02:44,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,102 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:02:44,625 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:44,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:44,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1685599063, now seen corresponding path program 1 times [2022-11-03 04:02:44,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:02:44,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1926014104] [2022-11-03 04:02:44,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:44,627 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:02:44,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:02:44,627 INFO L229 MonitoredProcess]: Starting monitored process 104 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:02:44,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (104)] Waiting until timeout for monitored process [2022-11-03 04:02:45,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:45,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 04:02:45,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:45,631 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 119 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:02:45,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:02:46,118 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 119 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:02:46,118 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:02:46,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1926014104] [2022-11-03 04:02:46,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1926014104] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:02:46,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1576663116] [2022-11-03 04:02:46,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:46,119 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:02:46,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:02:46,120 INFO L229 MonitoredProcess]: Starting monitored process 105 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:02:46,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (105)] Waiting until timeout for monitored process [2022-11-03 04:02:46,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:46,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:02:46,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:47,081 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 116 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 04:02:47,081 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:02:47,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1576663116] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:47,081 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:02:47,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 16 [2022-11-03 04:02:47,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726032686] [2022-11-03 04:02:47,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:47,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:02:47,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:02:47,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:02:47,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2022-11-03 04:02:47,082 INFO L87 Difference]: Start difference. First operand 966 states and 1296 transitions. Second operand has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 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 04:02:47,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:47,395 INFO L93 Difference]: Finished difference Result 2453 states and 3345 transitions. [2022-11-03 04:02:47,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:02:47,395 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 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) Word has length 243 [2022-11-03 04:02:47,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:47,397 INFO L225 Difference]: With dead ends: 2453 [2022-11-03 04:02:47,397 INFO L226 Difference]: Without dead ends: 1718 [2022-11-03 04:02:47,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 732 GetRequests, 715 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-11-03 04:02:47,399 INFO L413 NwaCegarLoop]: 487 mSDtfsCounter, 415 mSDsluCounter, 525 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 1012 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:47,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [415 Valid, 1012 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:02:47,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1718 states. [2022-11-03 04:02:47,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1718 to 970. [2022-11-03 04:02:47,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 970 states, 969 states have (on average 1.3415892672858618) internal successors, (1300), 969 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:47,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 970 states to 970 states and 1300 transitions. [2022-11-03 04:02:47,421 INFO L78 Accepts]: Start accepts. Automaton has 970 states and 1300 transitions. Word has length 243 [2022-11-03 04:02:47,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:47,422 INFO L495 AbstractCegarLoop]: Abstraction has 970 states and 1300 transitions. [2022-11-03 04:02:47,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 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 04:02:47,422 INFO L276 IsEmpty]: Start isEmpty. Operand 970 states and 1300 transitions. [2022-11-03 04:02:47,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-11-03 04:02:47,423 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:47,423 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:02:47,442 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (104)] Ended with exit code 0 [2022-11-03 04:02:47,628 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (105)] Forceful destruction successful, exit code 0 [2022-11-03 04:02:47,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,105 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:02:47,824 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:47,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:47,825 INFO L85 PathProgramCache]: Analyzing trace with hash -299395669, now seen corresponding path program 1 times [2022-11-03 04:02:47,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:02:47,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1989764042] [2022-11-03 04:02:47,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:47,826 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:02:47,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:02:47,827 INFO L229 MonitoredProcess]: Starting monitored process 106 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:02:47,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (106)] Waiting until timeout for monitored process [2022-11-03 04:02:48,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:48,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 04:02:48,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:48,866 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 119 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:02:48,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:02:49,333 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 119 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:02:49,333 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:02:49,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1989764042] [2022-11-03 04:02:49,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1989764042] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:02:49,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1752954404] [2022-11-03 04:02:49,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:49,334 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:02:49,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:02:49,336 INFO L229 MonitoredProcess]: Starting monitored process 107 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:02:49,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (107)] Waiting until timeout for monitored process [2022-11-03 04:02:50,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:50,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:02:50,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:50,294 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 116 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 04:02:50,294 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:02:50,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1752954404] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:50,294 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:02:50,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 16 [2022-11-03 04:02:50,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126599679] [2022-11-03 04:02:50,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:50,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:02:50,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:02:50,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:02:50,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2022-11-03 04:02:50,296 INFO L87 Difference]: Start difference. First operand 970 states and 1300 transitions. Second operand has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 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 04:02:50,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:50,622 INFO L93 Difference]: Finished difference Result 2459 states and 3348 transitions. [2022-11-03 04:02:50,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:02:50,622 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 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) Word has length 243 [2022-11-03 04:02:50,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:50,624 INFO L225 Difference]: With dead ends: 2459 [2022-11-03 04:02:50,624 INFO L226 Difference]: Without dead ends: 1720 [2022-11-03 04:02:50,625 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 732 GetRequests, 715 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-11-03 04:02:50,625 INFO L413 NwaCegarLoop]: 487 mSDtfsCounter, 412 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 1013 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:50,625 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [412 Valid, 1013 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:02:50,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1720 states. [2022-11-03 04:02:50,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1720 to 972. [2022-11-03 04:02:50,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 972 states, 971 states have (on average 1.3398558187435634) internal successors, (1301), 971 states have internal predecessors, (1301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:50,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 972 states to 972 states and 1301 transitions. [2022-11-03 04:02:50,647 INFO L78 Accepts]: Start accepts. Automaton has 972 states and 1301 transitions. Word has length 243 [2022-11-03 04:02:50,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:50,648 INFO L495 AbstractCegarLoop]: Abstraction has 972 states and 1301 transitions. [2022-11-03 04:02:50,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 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 04:02:50,648 INFO L276 IsEmpty]: Start isEmpty. Operand 972 states and 1301 transitions. [2022-11-03 04:02:50,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-11-03 04:02:50,649 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:50,650 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:02:50,654 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (107)] Forceful destruction successful, exit code 0 [2022-11-03 04:02:50,865 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (106)] Ended with exit code 0 [2022-11-03 04:02:51,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,106 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:02:51,050 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:51,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:51,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1623832365, now seen corresponding path program 1 times [2022-11-03 04:02:51,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:02:51,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1852403610] [2022-11-03 04:02:51,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:51,052 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:02:51,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:02:51,053 INFO L229 MonitoredProcess]: Starting monitored process 108 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:02:51,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (108)] Waiting until timeout for monitored process [2022-11-03 04:02:51,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:51,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 04:02:51,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:52,085 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 119 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:02:52,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:02:52,543 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 119 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:02:52,543 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:02:52,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1852403610] [2022-11-03 04:02:52,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1852403610] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:02:52,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1334152418] [2022-11-03 04:02:52,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:52,543 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:02:52,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:02:52,544 INFO L229 MonitoredProcess]: Starting monitored process 109 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:02:52,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (109)] Waiting until timeout for monitored process [2022-11-03 04:02:53,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:53,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:02:53,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:53,511 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 116 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 04:02:53,511 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:02:53,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1334152418] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:53,512 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:02:53,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 16 [2022-11-03 04:02:53,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641366443] [2022-11-03 04:02:53,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:53,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:02:53,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:02:53,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:02:53,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2022-11-03 04:02:53,513 INFO L87 Difference]: Start difference. First operand 972 states and 1301 transitions. Second operand has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 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 04:02:53,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:53,834 INFO L93 Difference]: Finished difference Result 2463 states and 3348 transitions. [2022-11-03 04:02:53,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:02:53,835 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 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) Word has length 243 [2022-11-03 04:02:53,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:53,837 INFO L225 Difference]: With dead ends: 2463 [2022-11-03 04:02:53,837 INFO L226 Difference]: Without dead ends: 1722 [2022-11-03 04:02:53,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 732 GetRequests, 715 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-11-03 04:02:53,838 INFO L413 NwaCegarLoop]: 487 mSDtfsCounter, 409 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 1014 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:53,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [409 Valid, 1014 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:02:53,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1722 states. [2022-11-03 04:02:53,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1722 to 974. [2022-11-03 04:02:53,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 974 states, 973 states have (on average 1.3381294964028776) internal successors, (1302), 973 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:53,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 974 states to 974 states and 1302 transitions. [2022-11-03 04:02:53,858 INFO L78 Accepts]: Start accepts. Automaton has 974 states and 1302 transitions. Word has length 243 [2022-11-03 04:02:53,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:53,858 INFO L495 AbstractCegarLoop]: Abstraction has 974 states and 1302 transitions. [2022-11-03 04:02:53,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 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 04:02:53,859 INFO L276 IsEmpty]: Start isEmpty. Operand 974 states and 1302 transitions. [2022-11-03 04:02:53,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-11-03 04:02:53,861 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:53,861 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:02:53,876 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (108)] Ended with exit code 0 [2022-11-03 04:02:54,065 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (109)] Ended with exit code 0 [2022-11-03 04:02:54,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,109 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:02:54,262 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:54,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:54,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1764380975, now seen corresponding path program 1 times [2022-11-03 04:02:54,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:02:54,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1805114650] [2022-11-03 04:02:54,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:54,264 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:02:54,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:02:54,264 INFO L229 MonitoredProcess]: Starting monitored process 110 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:02:54,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (110)] Waiting until timeout for monitored process [2022-11-03 04:02:54,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:54,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 04:02:54,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:55,285 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 119 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:02:55,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:02:55,751 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 119 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:02:55,752 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:02:55,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1805114650] [2022-11-03 04:02:55,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1805114650] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:02:55,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [374954016] [2022-11-03 04:02:55,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:55,752 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:02:55,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:02:55,753 INFO L229 MonitoredProcess]: Starting monitored process 111 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:02:55,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (111)] Waiting until timeout for monitored process [2022-11-03 04:02:56,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:56,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:02:56,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:56,724 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 116 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 04:02:56,724 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:02:56,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [374954016] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:56,725 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:02:56,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 16 [2022-11-03 04:02:56,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980159416] [2022-11-03 04:02:56,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:56,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:02:56,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:02:56,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:02:56,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2022-11-03 04:02:56,727 INFO L87 Difference]: Start difference. First operand 974 states and 1302 transitions. Second operand has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 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 04:02:57,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:57,049 INFO L93 Difference]: Finished difference Result 2467 states and 3348 transitions. [2022-11-03 04:02:57,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:02:57,049 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 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) Word has length 243 [2022-11-03 04:02:57,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:57,051 INFO L225 Difference]: With dead ends: 2467 [2022-11-03 04:02:57,051 INFO L226 Difference]: Without dead ends: 1724 [2022-11-03 04:02:57,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 732 GetRequests, 715 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-11-03 04:02:57,052 INFO L413 NwaCegarLoop]: 487 mSDtfsCounter, 406 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 1015 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:57,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [406 Valid, 1015 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:02:57,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1724 states. [2022-11-03 04:02:57,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1724 to 976. [2022-11-03 04:02:57,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 976 states, 975 states have (on average 1.3364102564102565) internal successors, (1303), 975 states have internal predecessors, (1303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:57,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 976 states to 976 states and 1303 transitions. [2022-11-03 04:02:57,074 INFO L78 Accepts]: Start accepts. Automaton has 976 states and 1303 transitions. Word has length 243 [2022-11-03 04:02:57,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:57,074 INFO L495 AbstractCegarLoop]: Abstraction has 976 states and 1303 transitions. [2022-11-03 04:02:57,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 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 04:02:57,074 INFO L276 IsEmpty]: Start isEmpty. Operand 976 states and 1303 transitions. [2022-11-03 04:02:57,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-11-03 04:02:57,076 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:57,076 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:02:57,092 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (110)] Ended with exit code 0 [2022-11-03 04:02:57,285 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (111)] Forceful destruction successful, exit code 0 [2022-11-03 04:02:57,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,111 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:02:57,481 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:57,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:57,482 INFO L85 PathProgramCache]: Analyzing trace with hash -41057359, now seen corresponding path program 1 times [2022-11-03 04:02:57,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:02:57,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [835561853] [2022-11-03 04:02:57,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:57,483 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:02:57,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:02:57,484 INFO L229 MonitoredProcess]: Starting monitored process 112 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:02:57,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (112)] Waiting until timeout for monitored process [2022-11-03 04:02:57,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:57,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 04:02:57,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:58,503 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 119 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:02:58,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:02:58,965 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 119 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:02:58,965 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:02:58,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [835561853] [2022-11-03 04:02:58,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [835561853] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:02:58,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1837042333] [2022-11-03 04:02:58,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:58,966 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:02:58,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:02:58,967 INFO L229 MonitoredProcess]: Starting monitored process 113 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:02:58,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (113)] Waiting until timeout for monitored process [2022-11-03 04:02:59,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:59,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:02:59,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:59,938 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 116 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 04:02:59,938 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:02:59,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1837042333] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:59,939 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:02:59,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 16 [2022-11-03 04:02:59,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38603498] [2022-11-03 04:02:59,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:59,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:02:59,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:02:59,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:02:59,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2022-11-03 04:02:59,941 INFO L87 Difference]: Start difference. First operand 976 states and 1303 transitions. Second operand has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 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 04:03:00,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:03:00,270 INFO L93 Difference]: Finished difference Result 2473 states and 3352 transitions. [2022-11-03 04:03:00,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:03:00,270 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 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) Word has length 243 [2022-11-03 04:03:00,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:03:00,272 INFO L225 Difference]: With dead ends: 2473 [2022-11-03 04:03:00,272 INFO L226 Difference]: Without dead ends: 1728 [2022-11-03 04:03:00,273 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 732 GetRequests, 715 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-11-03 04:03:00,274 INFO L413 NwaCegarLoop]: 490 mSDtfsCounter, 400 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 1020 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:03:00,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [400 Valid, 1020 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:03:00,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1728 states. [2022-11-03 04:03:00,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1728 to 980. [2022-11-03 04:03:00,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 980 states, 979 states have (on average 1.335035750766088) internal successors, (1307), 979 states have internal predecessors, (1307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:03:00,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 980 states to 980 states and 1307 transitions. [2022-11-03 04:03:00,294 INFO L78 Accepts]: Start accepts. Automaton has 980 states and 1307 transitions. Word has length 243 [2022-11-03 04:03:00,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:03:00,294 INFO L495 AbstractCegarLoop]: Abstraction has 980 states and 1307 transitions. [2022-11-03 04:03:00,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 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 04:03:00,294 INFO L276 IsEmpty]: Start isEmpty. Operand 980 states and 1307 transitions. [2022-11-03 04:03:00,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-11-03 04:03:00,295 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:03:00,296 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:03:00,311 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (112)] Ended with exit code 0 [2022-11-03 04:03:00,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (113)] Forceful destruction successful, exit code 0 [2022-11-03 04:03:00,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,113 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:03:00,697 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:03:00,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:03:00,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1730001101, now seen corresponding path program 1 times [2022-11-03 04:03:00,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:03:00,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1579143960] [2022-11-03 04:03:00,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:03:00,699 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:03:00,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:03:00,700 INFO L229 MonitoredProcess]: Starting monitored process 114 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:03:00,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (114)] Waiting until timeout for monitored process [2022-11-03 04:03:01,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:03:01,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 04:03:01,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:01,754 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 119 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:03:01,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:03:02,229 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 119 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:03:02,229 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:03:02,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1579143960] [2022-11-03 04:03:02,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1579143960] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:03:02,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1070524310] [2022-11-03 04:03:02,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:03:02,230 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:03:02,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:03:02,233 INFO L229 MonitoredProcess]: Starting monitored process 115 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:03:02,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (115)] Waiting until timeout for monitored process [2022-11-03 04:03:02,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:03:03,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:03:03,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:03,210 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 116 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 04:03:03,210 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:03:03,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1070524310] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:03:03,211 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:03:03,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 16 [2022-11-03 04:03:03,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823176258] [2022-11-03 04:03:03,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:03:03,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:03:03,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:03:03,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:03:03,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2022-11-03 04:03:03,212 INFO L87 Difference]: Start difference. First operand 980 states and 1307 transitions. Second operand has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 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 04:03:03,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:03:03,539 INFO L93 Difference]: Finished difference Result 2481 states and 3358 transitions. [2022-11-03 04:03:03,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:03:03,540 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 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) Word has length 243 [2022-11-03 04:03:03,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:03:03,542 INFO L225 Difference]: With dead ends: 2481 [2022-11-03 04:03:03,542 INFO L226 Difference]: Without dead ends: 1732 [2022-11-03 04:03:03,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 732 GetRequests, 715 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-11-03 04:03:03,543 INFO L413 NwaCegarLoop]: 493 mSDtfsCounter, 395 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 1027 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:03:03,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [395 Valid, 1027 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:03:03,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1732 states. [2022-11-03 04:03:03,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1732 to 984. [2022-11-03 04:03:03,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 984 states, 983 states have (on average 1.3336724313326551) internal successors, (1311), 983 states have internal predecessors, (1311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:03:03,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 984 states to 984 states and 1311 transitions. [2022-11-03 04:03:03,563 INFO L78 Accepts]: Start accepts. Automaton has 984 states and 1311 transitions. Word has length 243 [2022-11-03 04:03:03,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:03:03,563 INFO L495 AbstractCegarLoop]: Abstraction has 984 states and 1311 transitions. [2022-11-03 04:03:03,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 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 04:03:03,563 INFO L276 IsEmpty]: Start isEmpty. Operand 984 states and 1311 transitions. [2022-11-03 04:03:03,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-11-03 04:03:03,564 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:03:03,565 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:03:03,569 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (115)] Forceful destruction successful, exit code 0 [2022-11-03 04:03:03,780 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (114)] Ended with exit code 0 [2022-11-03 04:03:03,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,114 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:03:03,966 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:03:03,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:03:03,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1285102517, now seen corresponding path program 1 times [2022-11-03 04:03:03,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:03:03,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2094788602] [2022-11-03 04:03:03,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:03:03,968 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:03:03,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:03:03,969 INFO L229 MonitoredProcess]: Starting monitored process 116 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:03:03,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (116)] Waiting until timeout for monitored process [2022-11-03 04:03:04,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:03:04,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 04:03:04,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:04,986 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 119 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:03:04,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:03:05,453 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 119 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:03:05,453 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:03:05,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2094788602] [2022-11-03 04:03:05,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2094788602] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:03:05,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1769747062] [2022-11-03 04:03:05,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:03:05,454 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:03:05,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:03:05,455 INFO L229 MonitoredProcess]: Starting monitored process 117 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:03:05,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (117)] Waiting until timeout for monitored process [2022-11-03 04:03:06,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:03:06,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:03:06,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:06,441 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 116 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 04:03:06,441 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:03:06,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1769747062] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:03:06,441 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:03:06,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 16 [2022-11-03 04:03:06,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022273695] [2022-11-03 04:03:06,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:03:06,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:03:06,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:03:06,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:03:06,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2022-11-03 04:03:06,443 INFO L87 Difference]: Start difference. First operand 984 states and 1311 transitions. Second operand has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 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 04:03:06,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:03:06,774 INFO L93 Difference]: Finished difference Result 2489 states and 3364 transitions. [2022-11-03 04:03:06,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:03:06,774 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 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) Word has length 243 [2022-11-03 04:03:06,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:03:06,776 INFO L225 Difference]: With dead ends: 2489 [2022-11-03 04:03:06,776 INFO L226 Difference]: Without dead ends: 1736 [2022-11-03 04:03:06,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 732 GetRequests, 715 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-11-03 04:03:06,777 INFO L413 NwaCegarLoop]: 496 mSDtfsCounter, 390 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 1034 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 04:03:06,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [390 Valid, 1034 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 04:03:06,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1736 states. [2022-11-03 04:03:06,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1736 to 988. [2022-11-03 04:03:06,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 988 states, 987 states have (on average 1.3323201621073961) internal successors, (1315), 987 states have internal predecessors, (1315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:03:06,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 988 states to 988 states and 1315 transitions. [2022-11-03 04:03:06,798 INFO L78 Accepts]: Start accepts. Automaton has 988 states and 1315 transitions. Word has length 243 [2022-11-03 04:03:06,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:03:06,798 INFO L495 AbstractCegarLoop]: Abstraction has 988 states and 1315 transitions. [2022-11-03 04:03:06,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 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 04:03:06,798 INFO L276 IsEmpty]: Start isEmpty. Operand 988 states and 1315 transitions. [2022-11-03 04:03:06,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-11-03 04:03:06,799 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:03:06,800 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:03:06,804 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (117)] Forceful destruction successful, exit code 0 [2022-11-03 04:03:07,015 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (116)] Ended with exit code 0 [2022-11-03 04:03:07,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,116 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:03:07,200 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:03:07,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:03:07,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1986167095, now seen corresponding path program 1 times [2022-11-03 04:03:07,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:03:07,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1794830408] [2022-11-03 04:03:07,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:03:07,203 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:03:07,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:03:07,204 INFO L229 MonitoredProcess]: Starting monitored process 118 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:03:07,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (118)] Waiting until timeout for monitored process [2022-11-03 04:03:07,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:03:07,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 04:03:07,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:08,257 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 119 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:03:08,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:03:08,723 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 119 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:03:08,724 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:03:08,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1794830408] [2022-11-03 04:03:08,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1794830408] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:03:08,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [129789745] [2022-11-03 04:03:08,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:03:08,724 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:03:08,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:03:08,725 INFO L229 MonitoredProcess]: Starting monitored process 119 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:03:08,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (119)] Waiting until timeout for monitored process [2022-11-03 04:03:09,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:03:09,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:03:09,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:09,699 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 116 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 04:03:09,699 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:03:09,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [129789745] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:03:09,700 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:03:09,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 16 [2022-11-03 04:03:09,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46457808] [2022-11-03 04:03:09,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:03:09,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:03:09,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:03:09,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:03:09,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2022-11-03 04:03:09,702 INFO L87 Difference]: Start difference. First operand 988 states and 1315 transitions. Second operand has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 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 04:03:10,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:03:10,034 INFO L93 Difference]: Finished difference Result 2495 states and 3367 transitions. [2022-11-03 04:03:10,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:03:10,035 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 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) Word has length 243 [2022-11-03 04:03:10,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:03:10,037 INFO L225 Difference]: With dead ends: 2495 [2022-11-03 04:03:10,037 INFO L226 Difference]: Without dead ends: 1738 [2022-11-03 04:03:10,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 732 GetRequests, 715 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-11-03 04:03:10,038 INFO L413 NwaCegarLoop]: 496 mSDtfsCounter, 387 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 1035 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 04:03:10,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [387 Valid, 1035 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 04:03:10,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1738 states. [2022-11-03 04:03:10,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1738 to 990. [2022-11-03 04:03:10,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 990 states, 989 states have (on average 1.3306370070778564) internal successors, (1316), 989 states have internal predecessors, (1316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:03:10,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 990 states to 990 states and 1316 transitions. [2022-11-03 04:03:10,082 INFO L78 Accepts]: Start accepts. Automaton has 990 states and 1316 transitions. Word has length 243 [2022-11-03 04:03:10,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:03:10,082 INFO L495 AbstractCegarLoop]: Abstraction has 990 states and 1316 transitions. [2022-11-03 04:03:10,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 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 04:03:10,082 INFO L276 IsEmpty]: Start isEmpty. Operand 990 states and 1316 transitions. [2022-11-03 04:03:10,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-11-03 04:03:10,083 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:03:10,084 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:03:10,102 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (118)] Ended with exit code 0 [2022-11-03 04:03:10,288 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (119)] Forceful destruction successful, exit code 0 [2022-11-03 04:03:10,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,119 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:03:10,485 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:03:10,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:03:10,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1628741831, now seen corresponding path program 1 times [2022-11-03 04:03:10,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:03:10,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1520009050] [2022-11-03 04:03:10,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:03:10,486 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:03:10,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:03:10,487 INFO L229 MonitoredProcess]: Starting monitored process 120 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:03:10,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (120)] Waiting until timeout for monitored process [2022-11-03 04:03:10,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:03:10,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 04:03:10,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:11,478 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 119 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:03:11,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:03:11,943 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 119 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:03:11,943 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:03:11,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1520009050] [2022-11-03 04:03:11,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1520009050] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:03:11,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1763265157] [2022-11-03 04:03:11,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:03:11,943 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:03:11,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:03:11,944 INFO L229 MonitoredProcess]: Starting monitored process 121 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:03:11,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (121)] Waiting until timeout for monitored process [2022-11-03 04:03:12,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:03:12,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:03:12,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:12,941 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 116 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 04:03:12,941 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:03:12,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1763265157] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:03:12,942 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:03:12,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 16 [2022-11-03 04:03:12,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822655994] [2022-11-03 04:03:12,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:03:12,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:03:12,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:03:12,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:03:12,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2022-11-03 04:03:12,944 INFO L87 Difference]: Start difference. First operand 990 states and 1316 transitions. Second operand has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 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 04:03:13,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:03:13,298 INFO L93 Difference]: Finished difference Result 2503 states and 3374 transitions. [2022-11-03 04:03:13,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:03:13,299 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 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) Word has length 243 [2022-11-03 04:03:13,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:03:13,301 INFO L225 Difference]: With dead ends: 2503 [2022-11-03 04:03:13,301 INFO L226 Difference]: Without dead ends: 1744 [2022-11-03 04:03:13,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 732 GetRequests, 715 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-11-03 04:03:13,302 INFO L413 NwaCegarLoop]: 499 mSDtfsCounter, 381 mSDsluCounter, 541 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 1040 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 04:03:13,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [381 Valid, 1040 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 04:03:13,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1744 states. [2022-11-03 04:03:13,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1744 to 994. [2022-11-03 04:03:13,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 994 states, 993 states have (on average 1.3293051359516617) internal successors, (1320), 993 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:03:13,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 994 states to 994 states and 1320 transitions. [2022-11-03 04:03:13,322 INFO L78 Accepts]: Start accepts. Automaton has 994 states and 1320 transitions. Word has length 243 [2022-11-03 04:03:13,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:03:13,322 INFO L495 AbstractCegarLoop]: Abstraction has 994 states and 1320 transitions. [2022-11-03 04:03:13,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 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 04:03:13,323 INFO L276 IsEmpty]: Start isEmpty. Operand 994 states and 1320 transitions. [2022-11-03 04:03:13,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-11-03 04:03:13,324 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:03:13,324 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:03:13,345 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (120)] Ended with exit code 0 [2022-11-03 04:03:13,529 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (121)] Forceful destruction successful, exit code 0 [2022-11-03 04:03:13,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,121 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:03:13,725 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:03:13,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:03:13,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1626894789, now seen corresponding path program 1 times [2022-11-03 04:03:13,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:03:13,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1919822213] [2022-11-03 04:03:13,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:03:13,727 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:03:13,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:03:13,728 INFO L229 MonitoredProcess]: Starting monitored process 122 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:03:13,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (122)] Waiting until timeout for monitored process [2022-11-03 04:03:14,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:03:14,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 04:03:14,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:14,726 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 119 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:03:14,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:03:15,221 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 119 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:03:15,222 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:03:15,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1919822213] [2022-11-03 04:03:15,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1919822213] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:03:15,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [230101361] [2022-11-03 04:03:15,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:03:15,223 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:03:15,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:03:15,224 INFO L229 MonitoredProcess]: Starting monitored process 123 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:03:15,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (123)] Waiting until timeout for monitored process [2022-11-03 04:03:16,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:03:16,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 04:03:16,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:16,779 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 119 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:03:16,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:03:17,164 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 119 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:03:17,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [230101361] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:03:17,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330846913] [2022-11-03 04:03:17,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:03:17,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:03:17,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:03:17,166 INFO L229 MonitoredProcess]: Starting monitored process 124 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:03:17,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-11-03 04:03:17,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:03:17,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 04:03:17,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:18,307 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 85 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:03:18,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:03:18,887 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 85 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:03:18,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330846913] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:03:18,888 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:03:18,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 9, 9] total 26 [2022-11-03 04:03:18,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691772313] [2022-11-03 04:03:18,888 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:03:18,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-03 04:03:18,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:03:18,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-03 04:03:18,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=589, Unknown=0, NotChecked=0, Total=650 [2022-11-03 04:03:18,890 INFO L87 Difference]: Start difference. First operand 994 states and 1320 transitions. Second operand has 26 states, 26 states have (on average 24.03846153846154) internal successors, (625), 26 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:03:25,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:03:25,983 INFO L93 Difference]: Finished difference Result 16085 states and 21788 transitions. [2022-11-03 04:03:25,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2022-11-03 04:03:25,984 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 24.03846153846154) internal successors, (625), 26 states have internal predecessors, (625), 0 states have call successors, (0), 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 243 [2022-11-03 04:03:25,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:03:25,992 INFO L225 Difference]: With dead ends: 16085 [2022-11-03 04:03:25,992 INFO L226 Difference]: Without dead ends: 15322 [2022-11-03 04:03:25,996 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1583 GetRequests, 1432 SyntacticMatches, 1 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7563 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=3863, Invalid=19089, Unknown=0, NotChecked=0, Total=22952 [2022-11-03 04:03:25,996 INFO L413 NwaCegarLoop]: 454 mSDtfsCounter, 8499 mSDsluCounter, 7374 mSDsCounter, 0 mSdLazyCounter, 2126 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8499 SdHoareTripleChecker+Valid, 7828 SdHoareTripleChecker+Invalid, 3993 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 2126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1719 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-03 04:03:25,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8499 Valid, 7828 Invalid, 3993 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 2126 Invalid, 0 Unknown, 1719 Unchecked, 2.4s Time] [2022-11-03 04:03:26,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15322 states. [2022-11-03 04:03:26,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15322 to 1512. [2022-11-03 04:03:26,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1512 states, 1511 states have (on average 1.3401720714758438) internal successors, (2025), 1511 states have internal predecessors, (2025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:03:26,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1512 states to 1512 states and 2025 transitions. [2022-11-03 04:03:26,119 INFO L78 Accepts]: Start accepts. Automaton has 1512 states and 2025 transitions. Word has length 243 [2022-11-03 04:03:26,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:03:26,120 INFO L495 AbstractCegarLoop]: Abstraction has 1512 states and 2025 transitions. [2022-11-03 04:03:26,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 24.03846153846154) internal successors, (625), 26 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:03:26,120 INFO L276 IsEmpty]: Start isEmpty. Operand 1512 states and 2025 transitions. [2022-11-03 04:03:26,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-11-03 04:03:26,122 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:03:26,122 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:03:26,137 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (122)] Ended with exit code 0 [2022-11-03 04:03:26,349 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Ended with exit code 0 [2022-11-03 04:03:26,529 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (123)] Ended with exit code 0 [2022-11-03 04:03:26,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,124 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,123 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:03:26,723 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:03:26,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:03:26,724 INFO L85 PathProgramCache]: Analyzing trace with hash -490582597, now seen corresponding path program 1 times [2022-11-03 04:03:26,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:03:26,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [957320978] [2022-11-03 04:03:26,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:03:26,725 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:03:26,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:03:26,726 INFO L229 MonitoredProcess]: Starting monitored process 125 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:03:26,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (125)] Waiting until timeout for monitored process [2022-11-03 04:03:27,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:03:27,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 04:03:27,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:27,786 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 113 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:03:27,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:03:28,320 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 113 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:03:28,320 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:03:28,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [957320978] [2022-11-03 04:03:28,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [957320978] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:03:28,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1563347087] [2022-11-03 04:03:28,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:03:28,321 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:03:28,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:03:28,322 INFO L229 MonitoredProcess]: Starting monitored process 126 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:03:28,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (126)] Waiting until timeout for monitored process [2022-11-03 04:03:29,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:03:29,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 04:03:29,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:29,834 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 113 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:03:29,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:03:30,261 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 113 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:03:30,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1563347087] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:03:30,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856114857] [2022-11-03 04:03:30,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:03:30,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:03:30,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:03:30,263 INFO L229 MonitoredProcess]: Starting monitored process 127 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:03:30,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-11-03 04:03:30,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:03:30,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 04:03:30,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:31,385 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 101 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:03:31,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:03:31,793 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 101 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:03:31,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856114857] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:03:31,794 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:03:31,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 24 [2022-11-03 04:03:31,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706027734] [2022-11-03 04:03:31,794 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:03:31,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-03 04:03:31,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:03:31,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-03 04:03:31,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=497, Unknown=0, NotChecked=0, Total=552 [2022-11-03 04:03:31,796 INFO L87 Difference]: Start difference. First operand 1512 states and 2025 transitions. Second operand has 24 states, 24 states have (on average 27.291666666666668) internal successors, (655), 24 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:03:33,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:03:33,628 INFO L93 Difference]: Finished difference Result 12002 states and 16497 transitions. [2022-11-03 04:03:33,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-03 04:03:33,629 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 27.291666666666668) internal successors, (655), 24 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 243 [2022-11-03 04:03:33,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:03:33,636 INFO L225 Difference]: With dead ends: 12002 [2022-11-03 04:03:33,636 INFO L226 Difference]: Without dead ends: 10784 [2022-11-03 04:03:33,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1486 GetRequests, 1429 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=667, Invalid=2639, Unknown=0, NotChecked=0, Total=3306 [2022-11-03 04:03:33,639 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 7615 mSDsluCounter, 2176 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7615 SdHoareTripleChecker+Valid, 2389 SdHoareTripleChecker+Invalid, 1060 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 648 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 04:03:33,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7615 Valid, 2389 Invalid, 1060 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 295 Invalid, 0 Unknown, 648 Unchecked, 0.5s Time] [2022-11-03 04:03:33,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10784 states. [2022-11-03 04:03:33,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10784 to 2472. [2022-11-03 04:03:33,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2472 states, 2471 states have (on average 1.3537029542695265) internal successors, (3345), 2471 states have internal predecessors, (3345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:03:33,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2472 states to 2472 states and 3345 transitions. [2022-11-03 04:03:33,801 INFO L78 Accepts]: Start accepts. Automaton has 2472 states and 3345 transitions. Word has length 243 [2022-11-03 04:03:33,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:03:33,801 INFO L495 AbstractCegarLoop]: Abstraction has 2472 states and 3345 transitions. [2022-11-03 04:03:33,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 27.291666666666668) internal successors, (655), 24 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:03:33,802 INFO L276 IsEmpty]: Start isEmpty. Operand 2472 states and 3345 transitions. [2022-11-03 04:03:33,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-11-03 04:03:33,804 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:03:33,804 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:03:33,840 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Ended with exit code 0 [2022-11-03 04:03:34,020 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (125)] Forceful destruction successful, exit code 0 [2022-11-03 04:03:34,211 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (126)] Ended with exit code 0 [2022-11-03 04:03:34,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,125 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,126 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:03:34,405 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:03:34,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:03:34,406 INFO L85 PathProgramCache]: Analyzing trace with hash -70580033, now seen corresponding path program 1 times [2022-11-03 04:03:34,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:03:34,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1568114115] [2022-11-03 04:03:34,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:03:34,407 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:03:34,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:03:34,409 INFO L229 MonitoredProcess]: Starting monitored process 128 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:03:34,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (128)] Waiting until timeout for monitored process [2022-11-03 04:03:34,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:03:34,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 04:03:34,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:35,974 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 107 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:03:35,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:03:37,043 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 107 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:03:37,044 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:03:37,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1568114115] [2022-11-03 04:03:37,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1568114115] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:03:37,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1166872434] [2022-11-03 04:03:37,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:03:37,052 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:03:37,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:03:37,057 INFO L229 MonitoredProcess]: Starting monitored process 129 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:03:37,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (129)] Waiting until timeout for monitored process [2022-11-03 04:03:37,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:03:37,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:03:37,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:38,008 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 102 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 04:03:38,008 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:03:38,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1166872434] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:03:38,008 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:03:38,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 16 [2022-11-03 04:03:38,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138103974] [2022-11-03 04:03:38,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:03:38,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:03:38,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:03:38,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:03:38,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2022-11-03 04:03:38,010 INFO L87 Difference]: Start difference. First operand 2472 states and 3345 transitions. Second operand has 5 states, 5 states have (on average 45.4) internal successors, (227), 5 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:03:38,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:03:38,321 INFO L93 Difference]: Finished difference Result 8990 states and 12292 transitions. [2022-11-03 04:03:38,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 04:03:38,322 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 45.4) internal successors, (227), 5 states have internal predecessors, (227), 0 states have call successors, (0), 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 243 [2022-11-03 04:03:38,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:03:38,327 INFO L225 Difference]: With dead ends: 8990 [2022-11-03 04:03:38,327 INFO L226 Difference]: Without dead ends: 7100 [2022-11-03 04:03:38,329 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 732 GetRequests, 715 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-11-03 04:03:38,329 INFO L413 NwaCegarLoop]: 281 mSDtfsCounter, 916 mSDsluCounter, 514 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 916 SdHoareTripleChecker+Valid, 795 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:03:38,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [916 Valid, 795 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 04:03:38,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7100 states. [2022-11-03 04:03:38,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7100 to 3392. [2022-11-03 04:03:38,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3392 states, 3391 states have (on average 1.3627248599233264) internal successors, (4621), 3391 states have internal predecessors, (4621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:03:38,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3392 states to 3392 states and 4621 transitions. [2022-11-03 04:03:38,496 INFO L78 Accepts]: Start accepts. Automaton has 3392 states and 4621 transitions. Word has length 243 [2022-11-03 04:03:38,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:03:38,497 INFO L495 AbstractCegarLoop]: Abstraction has 3392 states and 4621 transitions. [2022-11-03 04:03:38,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 45.4) internal successors, (227), 5 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:03:38,497 INFO L276 IsEmpty]: Start isEmpty. Operand 3392 states and 4621 transitions. [2022-11-03 04:03:38,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-11-03 04:03:38,501 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:03:38,501 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:03:38,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (128)] Forceful destruction successful, exit code 0 [2022-11-03 04:03:38,706 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (129)] Forceful destruction successful, exit code 0 [2022-11-03 04:03:38,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,129 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:03:38,902 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:03:38,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:03:38,903 INFO L85 PathProgramCache]: Analyzing trace with hash -967973311, now seen corresponding path program 1 times [2022-11-03 04:03:38,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:03:38,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [973075723] [2022-11-03 04:03:38,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:03:38,906 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:03:38,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:03:38,908 INFO L229 MonitoredProcess]: Starting monitored process 130 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:03:38,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (130)] Waiting until timeout for monitored process [2022-11-03 04:03:39,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:03:39,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 04:03:39,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:40,525 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 107 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:03:40,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:03:41,583 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 107 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:03:41,583 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:03:41,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [973075723] [2022-11-03 04:03:41,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [973075723] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:03:41,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1988360623] [2022-11-03 04:03:41,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:03:41,584 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:03:41,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:03:41,589 INFO L229 MonitoredProcess]: Starting monitored process 131 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:03:41,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (131)] Waiting until timeout for monitored process [2022-11-03 04:03:42,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:03:42,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-03 04:03:42,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:43,847 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 99 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:03:43,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:03:58,081 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 99 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:03:58,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1988360623] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:03:58,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236890142] [2022-11-03 04:03:58,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:03:58,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:03:58,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:03:58,085 INFO L229 MonitoredProcess]: Starting monitored process 132 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:03:58,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2022-11-03 04:03:58,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:03:58,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 04:03:58,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:59,716 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 77 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:03:59,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:04:00,377 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 77 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:04:00,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236890142] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:04:00,377 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:04:00,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 15, 15, 9, 9] total 49 [2022-11-03 04:04:00,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713339246] [2022-11-03 04:04:00,378 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:04:00,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-03 04:04:00,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:04:00,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-03 04:04:00,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=2186, Unknown=3, NotChecked=0, Total=2352 [2022-11-03 04:04:00,380 INFO L87 Difference]: Start difference. First operand 3392 states and 4621 transitions. Second operand has 49 states, 49 states have (on average 19.6734693877551) internal successors, (964), 49 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:04:14,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:04:14,030 INFO L93 Difference]: Finished difference Result 44033 states and 60662 transitions. [2022-11-03 04:04:14,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-11-03 04:04:14,031 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 19.6734693877551) internal successors, (964), 49 states have internal predecessors, (964), 0 states have call successors, (0), 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 243 [2022-11-03 04:04:14,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:04:14,052 INFO L225 Difference]: With dead ends: 44033 [2022-11-03 04:04:14,053 INFO L226 Difference]: Without dead ends: 41223 [2022-11-03 04:04:14,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1594 GetRequests, 1422 SyntacticMatches, 0 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9379 ImplicationChecksByTransitivity, 23.3s TimeCoverageRelationStatistics Valid=4412, Invalid=25687, Unknown=3, NotChecked=0, Total=30102 [2022-11-03 04:04:14,064 INFO L413 NwaCegarLoop]: 469 mSDtfsCounter, 12647 mSDsluCounter, 10946 mSDsCounter, 0 mSdLazyCounter, 1902 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12647 SdHoareTripleChecker+Valid, 11415 SdHoareTripleChecker+Invalid, 5998 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 1902 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3877 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:04:14,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12647 Valid, 11415 Invalid, 5998 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 1902 Invalid, 0 Unknown, 3877 Unchecked, 2.2s Time] [2022-11-03 04:04:14,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41223 states. [2022-11-03 04:04:14,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41223 to 6776. [2022-11-03 04:04:14,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6776 states, 6775 states have (on average 1.361918819188192) internal successors, (9227), 6775 states have internal predecessors, (9227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:04:14,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6776 states to 6776 states and 9227 transitions. [2022-11-03 04:04:14,444 INFO L78 Accepts]: Start accepts. Automaton has 6776 states and 9227 transitions. Word has length 243 [2022-11-03 04:04:14,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:04:14,445 INFO L495 AbstractCegarLoop]: Abstraction has 6776 states and 9227 transitions. [2022-11-03 04:04:14,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 19.6734693877551) internal successors, (964), 49 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:04:14,445 INFO L276 IsEmpty]: Start isEmpty. Operand 6776 states and 9227 transitions. [2022-11-03 04:04:14,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-11-03 04:04:14,452 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:04:14,452 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:04:14,469 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (130)] Ended with exit code 0 [2022-11-03 04:04:14,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Forceful destruction successful, exit code 0 [2022-11-03 04:04:14,875 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (131)] Ended with exit code 0 [2022-11-03 04:04:15,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,132 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,131 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:04:15,069 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:04:15,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:04:15,070 INFO L85 PathProgramCache]: Analyzing trace with hash 397872841, now seen corresponding path program 1 times [2022-11-03 04:04:15,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:04:15,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [5591986] [2022-11-03 04:04:15,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:04:15,071 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:04:15,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:04:15,072 INFO L229 MonitoredProcess]: Starting monitored process 133 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:04:15,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (133)] Waiting until timeout for monitored process [2022-11-03 04:04:15,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:04:15,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 04:04:15,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:04:16,607 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 97 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:04:16,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:04:17,567 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 97 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:04:17,567 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:04:17,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [5591986] [2022-11-03 04:04:17,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [5591986] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:04:17,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1768130376] [2022-11-03 04:04:17,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:04:17,568 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:04:17,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:04:17,569 INFO L229 MonitoredProcess]: Starting monitored process 134 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:04:17,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (134)] Waiting until timeout for monitored process [2022-11-03 04:04:18,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:04:18,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:04:18,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:04:18,364 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 04:04:18,364 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:04:18,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1768130376] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:04:18,364 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:04:18,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9, 9] total 15 [2022-11-03 04:04:18,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250646362] [2022-11-03 04:04:18,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:04:18,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:04:18,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:04:18,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:04:18,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2022-11-03 04:04:18,366 INFO L87 Difference]: Start difference. First operand 6776 states and 9227 transitions. Second operand has 5 states, 5 states have (on average 46.2) internal successors, (231), 5 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:04:19,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:04:19,016 INFO L93 Difference]: Finished difference Result 15926 states and 21862 transitions. [2022-11-03 04:04:19,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 04:04:19,017 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 46.2) internal successors, (231), 5 states have internal predecessors, (231), 0 states have call successors, (0), 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 243 [2022-11-03 04:04:19,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:04:19,026 INFO L225 Difference]: With dead ends: 15926 [2022-11-03 04:04:19,026 INFO L226 Difference]: Without dead ends: 11148 [2022-11-03 04:04:19,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 732 GetRequests, 716 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-11-03 04:04:19,031 INFO L413 NwaCegarLoop]: 349 mSDtfsCounter, 704 mSDsluCounter, 548 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 704 SdHoareTripleChecker+Valid, 897 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:04:19,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [704 Valid, 897 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:04:19,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11148 states. [2022-11-03 04:04:19,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11148 to 6776. [2022-11-03 04:04:19,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6776 states, 6775 states have (on average 1.3571955719557196) internal successors, (9195), 6775 states have internal predecessors, (9195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:04:19,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6776 states to 6776 states and 9195 transitions. [2022-11-03 04:04:19,465 INFO L78 Accepts]: Start accepts. Automaton has 6776 states and 9195 transitions. Word has length 243 [2022-11-03 04:04:19,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:04:19,465 INFO L495 AbstractCegarLoop]: Abstraction has 6776 states and 9195 transitions. [2022-11-03 04:04:19,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 46.2) internal successors, (231), 5 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:04:19,466 INFO L276 IsEmpty]: Start isEmpty. Operand 6776 states and 9195 transitions. [2022-11-03 04:04:19,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-11-03 04:04:19,473 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:04:19,473 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:04:19,491 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (133)] Forceful destruction successful, exit code 0 [2022-11-03 04:04:19,677 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (134)] Ended with exit code 0 [2022-11-03 04:04:19,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,134 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:04:19,874 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:04:19,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:04:19,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1998943947, now seen corresponding path program 1 times [2022-11-03 04:04:19,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:04:19,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [333222359] [2022-11-03 04:04:19,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:04:19,876 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:04:19,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:04:19,877 INFO L229 MonitoredProcess]: Starting monitored process 135 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:04:19,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (135)] Waiting until timeout for monitored process [2022-11-03 04:04:20,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:04:20,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 04:04:20,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:04:21,456 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 93 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:04:21,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:04:22,460 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 93 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:04:22,460 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:04:22,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [333222359] [2022-11-03 04:04:22,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [333222359] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:04:22,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1824370040] [2022-11-03 04:04:22,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:04:22,461 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:04:22,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:04:22,465 INFO L229 MonitoredProcess]: Starting monitored process 136 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:04:22,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (136)] Waiting until timeout for monitored process [2022-11-03 04:04:23,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:04:23,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:04:23,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:04:23,375 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 04:04:23,375 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:04:23,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1824370040] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:04:23,376 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:04:23,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9, 9] total 15 [2022-11-03 04:04:23,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824106508] [2022-11-03 04:04:23,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:04:23,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:04:23,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:04:23,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:04:23,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2022-11-03 04:04:23,377 INFO L87 Difference]: Start difference. First operand 6776 states and 9195 transitions. Second operand has 5 states, 5 states have (on average 46.2) internal successors, (231), 5 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:04:23,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:04:23,976 INFO L93 Difference]: Finished difference Result 16054 states and 21926 transitions. [2022-11-03 04:04:23,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 04:04:23,976 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 46.2) internal successors, (231), 5 states have internal predecessors, (231), 0 states have call successors, (0), 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 243 [2022-11-03 04:04:23,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:04:23,984 INFO L225 Difference]: With dead ends: 16054 [2022-11-03 04:04:23,984 INFO L226 Difference]: Without dead ends: 11276 [2022-11-03 04:04:23,988 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 732 GetRequests, 716 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-11-03 04:04:23,989 INFO L413 NwaCegarLoop]: 353 mSDtfsCounter, 698 mSDsluCounter, 551 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 698 SdHoareTripleChecker+Valid, 904 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:04:23,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [698 Valid, 904 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:04:23,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11276 states. [2022-11-03 04:04:24,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11276 to 6776. [2022-11-03 04:04:24,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6776 states, 6775 states have (on average 1.3524723247232473) internal successors, (9163), 6775 states have internal predecessors, (9163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:04:24,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6776 states to 6776 states and 9163 transitions. [2022-11-03 04:04:24,256 INFO L78 Accepts]: Start accepts. Automaton has 6776 states and 9163 transitions. Word has length 243 [2022-11-03 04:04:24,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:04:24,256 INFO L495 AbstractCegarLoop]: Abstraction has 6776 states and 9163 transitions. [2022-11-03 04:04:24,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 46.2) internal successors, (231), 5 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:04:24,257 INFO L276 IsEmpty]: Start isEmpty. Operand 6776 states and 9163 transitions. [2022-11-03 04:04:24,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-11-03 04:04:24,265 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:04:24,265 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:04:24,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (135)] Forceful destruction successful, exit code 0 [2022-11-03 04:04:24,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (136)] Forceful destruction successful, exit code 0 [2022-11-03 04:04:24,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,136 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:04:24,681 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:04:24,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:04:24,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1115434957, now seen corresponding path program 1 times [2022-11-03 04:04:24,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:04:24,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1044915448] [2022-11-03 04:04:24,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:04:24,683 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:04:24,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:04:24,684 INFO L229 MonitoredProcess]: Starting monitored process 137 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:04:24,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (137)] Waiting until timeout for monitored process [2022-11-03 04:04:25,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:04:25,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 04:04:25,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:04:26,298 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 83 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:04:26,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:04:27,325 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 83 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:04:27,325 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:04:27,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1044915448] [2022-11-03 04:04:27,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1044915448] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:04:27,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [396869481] [2022-11-03 04:04:27,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:04:27,326 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:04:27,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:04:27,326 INFO L229 MonitoredProcess]: Starting monitored process 138 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:04:27,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (138)] Waiting until timeout for monitored process [2022-11-03 04:04:28,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:04:28,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:04:28,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:04:28,190 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 04:04:28,191 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:04:28,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [396869481] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:04:28,191 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:04:28,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9, 9] total 15 [2022-11-03 04:04:28,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139461528] [2022-11-03 04:04:28,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:04:28,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:04:28,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:04:28,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:04:28,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2022-11-03 04:04:28,192 INFO L87 Difference]: Start difference. First operand 6776 states and 9163 transitions. Second operand has 5 states, 5 states have (on average 46.2) internal successors, (231), 5 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:04:28,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:04:28,931 INFO L93 Difference]: Finished difference Result 18290 states and 24764 transitions. [2022-11-03 04:04:28,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 04:04:28,932 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 46.2) internal successors, (231), 5 states have internal predecessors, (231), 0 states have call successors, (0), 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 243 [2022-11-03 04:04:28,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:04:28,940 INFO L225 Difference]: With dead ends: 18290 [2022-11-03 04:04:28,940 INFO L226 Difference]: Without dead ends: 13512 [2022-11-03 04:04:28,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 732 GetRequests, 716 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-11-03 04:04:28,945 INFO L413 NwaCegarLoop]: 491 mSDtfsCounter, 551 mSDsluCounter, 562 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 551 SdHoareTripleChecker+Valid, 1053 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:04:28,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [551 Valid, 1053 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:04:28,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13512 states. [2022-11-03 04:04:29,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13512 to 6776. [2022-11-03 04:04:29,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6776 states, 6775 states have (on average 1.350110701107011) internal successors, (9147), 6775 states have internal predecessors, (9147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:04:29,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6776 states to 6776 states and 9147 transitions. [2022-11-03 04:04:29,232 INFO L78 Accepts]: Start accepts. Automaton has 6776 states and 9147 transitions. Word has length 243 [2022-11-03 04:04:29,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:04:29,232 INFO L495 AbstractCegarLoop]: Abstraction has 6776 states and 9147 transitions. [2022-11-03 04:04:29,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 46.2) internal successors, (231), 5 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:04:29,233 INFO L276 IsEmpty]: Start isEmpty. Operand 6776 states and 9147 transitions. [2022-11-03 04:04:29,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-11-03 04:04:29,237 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:04:29,237 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:04:29,241 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (138)] Forceful destruction successful, exit code 0 [2022-11-03 04:04:29,453 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (137)] Ended with exit code 0 [2022-11-03 04:04:29,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,137 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:04:29,638 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:04:29,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:04:29,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1854676145, now seen corresponding path program 1 times [2022-11-03 04:04:29,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:04:29,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [170802066] [2022-11-03 04:04:29,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:04:29,639 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:04:29,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:04:29,640 INFO L229 MonitoredProcess]: Starting monitored process 139 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:04:29,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (139)] Waiting until timeout for monitored process [2022-11-03 04:04:30,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:04:30,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 04:04:30,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:04:31,367 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 73 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:04:31,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:04:32,443 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 73 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:04:32,444 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:04:32,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [170802066] [2022-11-03 04:04:32,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [170802066] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:04:32,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1618121603] [2022-11-03 04:04:32,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:04:32,444 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:04:32,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:04:32,445 INFO L229 MonitoredProcess]: Starting monitored process 140 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:04:32,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (140)] Waiting until timeout for monitored process [2022-11-03 04:04:33,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:04:33,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:04:33,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:04:33,373 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 04:04:33,373 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:04:33,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1618121603] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:04:33,374 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:04:33,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9, 9] total 18 [2022-11-03 04:04:33,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047450084] [2022-11-03 04:04:33,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:04:33,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:04:33,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:04:33,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:04:33,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2022-11-03 04:04:33,375 INFO L87 Difference]: Start difference. First operand 6776 states and 9147 transitions. Second operand has 5 states, 5 states have (on average 46.2) internal successors, (231), 5 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:04:34,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:04:34,172 INFO L93 Difference]: Finished difference Result 18524 states and 25043 transitions. [2022-11-03 04:04:34,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 04:04:34,177 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 46.2) internal successors, (231), 5 states have internal predecessors, (231), 0 states have call successors, (0), 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 243 [2022-11-03 04:04:34,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:04:34,190 INFO L225 Difference]: With dead ends: 18524 [2022-11-03 04:04:34,190 INFO L226 Difference]: Without dead ends: 13746 [2022-11-03 04:04:34,194 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 732 GetRequests, 713 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2022-11-03 04:04:34,194 INFO L413 NwaCegarLoop]: 492 mSDtfsCounter, 555 mSDsluCounter, 583 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 555 SdHoareTripleChecker+Valid, 1075 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:04:34,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [555 Valid, 1075 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:04:34,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13746 states. [2022-11-03 04:04:34,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13746 to 6776. [2022-11-03 04:04:34,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6776 states, 6775 states have (on average 1.3471586715867159) internal successors, (9127), 6775 states have internal predecessors, (9127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:04:34,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6776 states to 6776 states and 9127 transitions. [2022-11-03 04:04:34,575 INFO L78 Accepts]: Start accepts. Automaton has 6776 states and 9127 transitions. Word has length 243 [2022-11-03 04:04:34,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:04:34,576 INFO L495 AbstractCegarLoop]: Abstraction has 6776 states and 9127 transitions. [2022-11-03 04:04:34,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 46.2) internal successors, (231), 5 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:04:34,576 INFO L276 IsEmpty]: Start isEmpty. Operand 6776 states and 9127 transitions. [2022-11-03 04:04:34,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-11-03 04:04:34,582 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:04:34,583 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:04:34,598 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (139)] Ended with exit code 0 [2022-11-03 04:04:34,787 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (140)] Ended with exit code 0 [2022-11-03 04:04:34,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,140 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:04:34,983 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:04:34,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:04:34,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1224137425, now seen corresponding path program 1 times [2022-11-03 04:04:34,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:04:34,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1867673779] [2022-11-03 04:04:34,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:04:34,985 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:04:34,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:04:34,986 INFO L229 MonitoredProcess]: Starting monitored process 141 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:04:34,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (141)] Waiting until timeout for monitored process [2022-11-03 04:04:35,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:04:35,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 04:04:35,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:04:36,664 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 73 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:04:36,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:04:37,758 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 73 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:04:37,758 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:04:37,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1867673779] [2022-11-03 04:04:37,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1867673779] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:04:37,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1531553210] [2022-11-03 04:04:37,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:04:37,759 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:04:37,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:04:37,760 INFO L229 MonitoredProcess]: Starting monitored process 142 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:04:37,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (142)] Waiting until timeout for monitored process [2022-11-03 04:04:38,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:04:38,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:04:38,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:04:38,681 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 04:04:38,681 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:04:38,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1531553210] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:04:38,682 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:04:38,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9, 9] total 18 [2022-11-03 04:04:38,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498469600] [2022-11-03 04:04:38,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:04:38,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:04:38,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:04:38,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:04:38,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2022-11-03 04:04:38,683 INFO L87 Difference]: Start difference. First operand 6776 states and 9127 transitions. Second operand has 5 states, 5 states have (on average 46.2) internal successors, (231), 5 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:04:39,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:04:39,436 INFO L93 Difference]: Finished difference Result 18576 states and 25042 transitions. [2022-11-03 04:04:39,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 04:04:39,437 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 46.2) internal successors, (231), 5 states have internal predecessors, (231), 0 states have call successors, (0), 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 243 [2022-11-03 04:04:39,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:04:39,446 INFO L225 Difference]: With dead ends: 18576 [2022-11-03 04:04:39,446 INFO L226 Difference]: Without dead ends: 13798 [2022-11-03 04:04:39,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 732 GetRequests, 713 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2022-11-03 04:04:39,451 INFO L413 NwaCegarLoop]: 491 mSDtfsCounter, 555 mSDsluCounter, 587 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 555 SdHoareTripleChecker+Valid, 1078 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:04:39,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [555 Valid, 1078 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:04:39,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13798 states. [2022-11-03 04:04:39,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13798 to 6776. [2022-11-03 04:04:39,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6776 states, 6775 states have (on average 1.3418450184501844) internal successors, (9091), 6775 states have internal predecessors, (9091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:04:39,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6776 states to 6776 states and 9091 transitions. [2022-11-03 04:04:39,746 INFO L78 Accepts]: Start accepts. Automaton has 6776 states and 9091 transitions. Word has length 243 [2022-11-03 04:04:39,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:04:39,746 INFO L495 AbstractCegarLoop]: Abstraction has 6776 states and 9091 transitions. [2022-11-03 04:04:39,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 46.2) internal successors, (231), 5 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:04:39,747 INFO L276 IsEmpty]: Start isEmpty. Operand 6776 states and 9091 transitions. [2022-11-03 04:04:39,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-11-03 04:04:39,751 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:04:39,751 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:04:39,773 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (141)] Ended with exit code 0 [2022-11-03 04:04:39,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (142)] Forceful destruction successful, exit code 0 [2022-11-03 04:04:40,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,142 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:04:40,152 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:04:40,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:04:40,152 INFO L85 PathProgramCache]: Analyzing trace with hash 806740819, now seen corresponding path program 1 times [2022-11-03 04:04:40,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:04:40,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [941497973] [2022-11-03 04:04:40,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:04:40,154 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:04:40,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:04:40,155 INFO L229 MonitoredProcess]: Starting monitored process 143 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:04:40,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (143)] Waiting until timeout for monitored process [2022-11-03 04:04:40,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:04:40,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 04:04:40,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:04:41,745 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 73 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:04:41,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:04:42,824 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 73 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:04:42,825 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:04:42,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [941497973] [2022-11-03 04:04:42,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [941497973] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:04:42,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2138249425] [2022-11-03 04:04:42,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:04:42,825 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:04:42,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:04:42,826 INFO L229 MonitoredProcess]: Starting monitored process 144 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:04:42,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (144)] Waiting until timeout for monitored process [2022-11-03 04:04:43,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:04:43,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:04:43,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:04:43,767 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 04:04:43,768 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:04:43,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2138249425] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:04:43,768 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:04:43,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9, 9] total 18 [2022-11-03 04:04:43,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231909270] [2022-11-03 04:04:43,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:04:43,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:04:43,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:04:43,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:04:43,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2022-11-03 04:04:43,769 INFO L87 Difference]: Start difference. First operand 6776 states and 9091 transitions. Second operand has 5 states, 5 states have (on average 46.2) internal successors, (231), 5 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:04:44,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:04:44,547 INFO L93 Difference]: Finished difference Result 18792 states and 25249 transitions. [2022-11-03 04:04:44,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 04:04:44,548 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 46.2) internal successors, (231), 5 states have internal predecessors, (231), 0 states have call successors, (0), 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 243 [2022-11-03 04:04:44,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:04:44,555 INFO L225 Difference]: With dead ends: 18792 [2022-11-03 04:04:44,556 INFO L226 Difference]: Without dead ends: 14014 [2022-11-03 04:04:44,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 732 GetRequests, 713 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2022-11-03 04:04:44,558 INFO L413 NwaCegarLoop]: 490 mSDtfsCounter, 557 mSDsluCounter, 597 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 557 SdHoareTripleChecker+Valid, 1087 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:04:44,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [557 Valid, 1087 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:04:44,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14014 states. [2022-11-03 04:04:44,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14014 to 6776. [2022-11-03 04:04:44,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6776 states, 6775 states have (on average 1.3365313653136532) internal successors, (9055), 6775 states have internal predecessors, (9055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:04:44,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6776 states to 6776 states and 9055 transitions. [2022-11-03 04:04:44,852 INFO L78 Accepts]: Start accepts. Automaton has 6776 states and 9055 transitions. Word has length 243 [2022-11-03 04:04:44,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:04:44,852 INFO L495 AbstractCegarLoop]: Abstraction has 6776 states and 9055 transitions. [2022-11-03 04:04:44,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 46.2) internal successors, (231), 5 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:04:44,853 INFO L276 IsEmpty]: Start isEmpty. Operand 6776 states and 9055 transitions. [2022-11-03 04:04:44,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-11-03 04:04:44,856 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:04:44,857 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:04:44,880 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (143)] Ended with exit code 0 [2022-11-03 04:04:45,061 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (144)] Forceful destruction successful, exit code 0 [2022-11-03 04:04:45,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,144 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:04:45,258 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:04:45,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:04:45,258 INFO L85 PathProgramCache]: Analyzing trace with hash -2101441067, now seen corresponding path program 1 times [2022-11-03 04:04:45,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:04:45,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1295889297] [2022-11-03 04:04:45,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:04:45,259 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:04:45,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:04:45,260 INFO L229 MonitoredProcess]: Starting monitored process 145 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:04:45,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (145)] Waiting until timeout for monitored process [2022-11-03 04:04:45,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:04:45,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 04:04:45,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:04:46,847 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 73 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:04:46,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:04:47,928 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 73 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:04:47,928 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:04:47,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1295889297] [2022-11-03 04:04:47,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1295889297] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:04:47,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [611737963] [2022-11-03 04:04:47,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:04:47,929 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:04:47,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:04:47,932 INFO L229 MonitoredProcess]: Starting monitored process 146 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:04:47,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (146)] Waiting until timeout for monitored process [2022-11-03 04:04:48,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:04:48,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:04:48,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:04:48,897 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 04:04:48,897 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:04:48,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [611737963] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:04:48,897 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:04:48,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9, 9] total 18 [2022-11-03 04:04:48,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371966446] [2022-11-03 04:04:48,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:04:48,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:04:48,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:04:48,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:04:48,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2022-11-03 04:04:48,899 INFO L87 Difference]: Start difference. First operand 6776 states and 9055 transitions. Second operand has 5 states, 5 states have (on average 46.2) internal successors, (231), 5 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:04:49,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:04:49,674 INFO L93 Difference]: Finished difference Result 18954 states and 25389 transitions. [2022-11-03 04:04:49,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 04:04:49,675 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 46.2) internal successors, (231), 5 states have internal predecessors, (231), 0 states have call successors, (0), 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 243 [2022-11-03 04:04:49,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:04:49,684 INFO L225 Difference]: With dead ends: 18954 [2022-11-03 04:04:49,684 INFO L226 Difference]: Without dead ends: 14176 [2022-11-03 04:04:49,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 732 GetRequests, 713 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2022-11-03 04:04:49,689 INFO L413 NwaCegarLoop]: 489 mSDtfsCounter, 558 mSDsluCounter, 604 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 558 SdHoareTripleChecker+Valid, 1093 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:04:49,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [558 Valid, 1093 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:04:49,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14176 states. [2022-11-03 04:04:49,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14176 to 6776. [2022-11-03 04:04:49,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6776 states, 6775 states have (on average 1.3312177121771218) internal successors, (9019), 6775 states have internal predecessors, (9019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:04:49,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6776 states to 6776 states and 9019 transitions. [2022-11-03 04:04:49,972 INFO L78 Accepts]: Start accepts. Automaton has 6776 states and 9019 transitions. Word has length 243 [2022-11-03 04:04:49,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:04:49,972 INFO L495 AbstractCegarLoop]: Abstraction has 6776 states and 9019 transitions. [2022-11-03 04:04:49,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 46.2) internal successors, (231), 5 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:04:49,973 INFO L276 IsEmpty]: Start isEmpty. Operand 6776 states and 9019 transitions. [2022-11-03 04:04:49,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-11-03 04:04:49,977 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:04:49,977 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:04:49,994 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (145)] Ended with exit code 0 [2022-11-03 04:04:50,181 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (146)] Ended with exit code 0 [2022-11-03 04:04:50,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,146 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:04:50,378 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:04:50,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:04:50,378 INFO L85 PathProgramCache]: Analyzing trace with hash -2116959785, now seen corresponding path program 1 times [2022-11-03 04:04:50,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:04:50,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1650870708] [2022-11-03 04:04:50,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:04:50,379 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:04:50,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:04:50,380 INFO L229 MonitoredProcess]: Starting monitored process 147 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:04:50,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (147)] Waiting until timeout for monitored process [2022-11-03 04:04:50,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:04:50,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 04:04:50,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:04:52,085 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 73 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:04:52,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:04:53,173 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 73 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:04:53,173 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:04:53,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1650870708] [2022-11-03 04:04:53,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1650870708] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:04:53,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1072228106] [2022-11-03 04:04:53,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:04:53,174 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:04:53,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:04:53,175 INFO L229 MonitoredProcess]: Starting monitored process 148 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:04:53,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (148)] Waiting until timeout for monitored process [2022-11-03 04:04:53,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:04:53,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:04:53,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:04:54,129 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 04:04:54,129 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:04:54,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1072228106] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:04:54,129 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:04:54,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9, 9] total 18 [2022-11-03 04:04:54,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551989845] [2022-11-03 04:04:54,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:04:54,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:04:54,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:04:54,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:04:54,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2022-11-03 04:04:54,131 INFO L87 Difference]: Start difference. First operand 6776 states and 9019 transitions. Second operand has 5 states, 5 states have (on average 45.2) internal successors, (226), 5 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:04:54,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:04:54,776 INFO L93 Difference]: Finished difference Result 23910 states and 31970 transitions. [2022-11-03 04:04:54,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:04:54,777 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 45.2) internal successors, (226), 5 states have internal predecessors, (226), 0 states have call successors, (0), 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 243 [2022-11-03 04:04:54,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:04:54,790 INFO L225 Difference]: With dead ends: 23910 [2022-11-03 04:04:54,790 INFO L226 Difference]: Without dead ends: 19132 [2022-11-03 04:04:54,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 732 GetRequests, 713 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2022-11-03 04:04:54,793 INFO L413 NwaCegarLoop]: 283 mSDtfsCounter, 898 mSDsluCounter, 519 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 898 SdHoareTripleChecker+Valid, 802 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:04:54,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [898 Valid, 802 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 04:04:54,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19132 states. [2022-11-03 04:04:55,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19132 to 9792. [2022-11-03 04:04:55,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9792 states, 9791 states have (on average 1.3309161474823819) internal successors, (13031), 9791 states have internal predecessors, (13031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:04:55,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9792 states to 9792 states and 13031 transitions. [2022-11-03 04:04:55,147 INFO L78 Accepts]: Start accepts. Automaton has 9792 states and 13031 transitions. Word has length 243 [2022-11-03 04:04:55,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:04:55,147 INFO L495 AbstractCegarLoop]: Abstraction has 9792 states and 13031 transitions. [2022-11-03 04:04:55,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 45.2) internal successors, (226), 5 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:04:55,148 INFO L276 IsEmpty]: Start isEmpty. Operand 9792 states and 13031 transitions. [2022-11-03 04:04:55,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-11-03 04:04:55,153 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:04:55,154 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:04:55,169 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (147)] Forceful destruction successful, exit code 0 [2022-11-03 04:04:55,358 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (148)] Ended with exit code 0 [2022-11-03 04:04:55,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,148 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:04:55,554 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:04:55,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:04:55,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1693313063, now seen corresponding path program 1 times [2022-11-03 04:04:55,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:04:55,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2039070410] [2022-11-03 04:04:55,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:04:55,557 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:04:55,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:04:55,558 INFO L229 MonitoredProcess]: Starting monitored process 149 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:04:55,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (149)] Waiting until timeout for monitored process [2022-11-03 04:04:56,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:04:56,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 04:04:56,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:04:57,249 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 73 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:04:57,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:04:58,356 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 73 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:04:58,356 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:04:58,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2039070410] [2022-11-03 04:04:58,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2039070410] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:04:58,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [940397768] [2022-11-03 04:04:58,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:04:58,357 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:04:58,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:04:58,358 INFO L229 MonitoredProcess]: Starting monitored process 150 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:04:58,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (150)] Waiting until timeout for monitored process [2022-11-03 04:04:59,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:04:59,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:04:59,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:04:59,326 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 04:04:59,326 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:04:59,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [940397768] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:04:59,327 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:04:59,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9, 9] total 18 [2022-11-03 04:04:59,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542166327] [2022-11-03 04:04:59,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:04:59,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:04:59,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:04:59,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:04:59,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2022-11-03 04:04:59,329 INFO L87 Difference]: Start difference. First operand 9792 states and 13031 transitions. Second operand has 5 states, 5 states have (on average 46.2) internal successors, (231), 5 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:05:00,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:05:00,156 INFO L93 Difference]: Finished difference Result 28272 states and 37745 transitions. [2022-11-03 04:05:00,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 04:05:00,157 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 46.2) internal successors, (231), 5 states have internal predecessors, (231), 0 states have call successors, (0), 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 243 [2022-11-03 04:05:00,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:05:00,171 INFO L225 Difference]: With dead ends: 28272 [2022-11-03 04:05:00,171 INFO L226 Difference]: Without dead ends: 20478 [2022-11-03 04:05:00,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 732 GetRequests, 713 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2022-11-03 04:05:00,178 INFO L413 NwaCegarLoop]: 491 mSDtfsCounter, 560 mSDsluCounter, 620 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 560 SdHoareTripleChecker+Valid, 1111 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:05:00,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [560 Valid, 1111 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:05:00,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20478 states. [2022-11-03 04:05:00,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20478 to 9864. [2022-11-03 04:05:00,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9864 states, 9863 states have (on average 1.3301226807259454) internal successors, (13119), 9863 states have internal predecessors, (13119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:05:00,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9864 states to 9864 states and 13119 transitions. [2022-11-03 04:05:00,511 INFO L78 Accepts]: Start accepts. Automaton has 9864 states and 13119 transitions. Word has length 243 [2022-11-03 04:05:00,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:05:00,511 INFO L495 AbstractCegarLoop]: Abstraction has 9864 states and 13119 transitions. [2022-11-03 04:05:00,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 46.2) internal successors, (231), 5 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:05:00,511 INFO L276 IsEmpty]: Start isEmpty. Operand 9864 states and 13119 transitions. [2022-11-03 04:05:00,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-11-03 04:05:00,517 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:05:00,517 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:05:00,535 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (149)] Ended with exit code 0 [2022-11-03 04:05:00,722 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (150)] Forceful destruction successful, exit code 0 [2022-11-03 04:05:00,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,150 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:05:00,918 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:05:00,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:05:00,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1757648731, now seen corresponding path program 1 times [2022-11-03 04:05:00,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:05:00,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1984695732] [2022-11-03 04:05:00,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:05:00,920 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:05:00,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:05:00,921 INFO L229 MonitoredProcess]: Starting monitored process 151 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:05:00,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (151)] Waiting until timeout for monitored process [2022-11-03 04:05:01,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:05:01,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 04:05:01,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:05:02,636 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 73 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:05:02,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:05:03,724 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 73 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:05:03,724 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:05:03,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1984695732] [2022-11-03 04:05:03,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1984695732] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:05:03,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1228828908] [2022-11-03 04:05:03,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:05:03,725 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:05:03,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:05:03,726 INFO L229 MonitoredProcess]: Starting monitored process 152 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:05:03,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (152)] Waiting until timeout for monitored process [2022-11-03 04:05:04,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:05:04,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:05:04,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:05:04,648 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 04:05:04,649 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:05:04,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1228828908] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:05:04,649 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:05:04,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9, 9] total 18 [2022-11-03 04:05:04,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500776229] [2022-11-03 04:05:04,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:05:04,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:05:04,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:05:04,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:05:04,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2022-11-03 04:05:04,650 INFO L87 Difference]: Start difference. First operand 9864 states and 13119 transitions. Second operand has 5 states, 5 states have (on average 46.2) internal successors, (231), 5 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:05:05,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:05:05,330 INFO L93 Difference]: Finished difference Result 28364 states and 37826 transitions. [2022-11-03 04:05:05,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 04:05:05,330 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 46.2) internal successors, (231), 5 states have internal predecessors, (231), 0 states have call successors, (0), 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 243 [2022-11-03 04:05:05,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:05:05,341 INFO L225 Difference]: With dead ends: 28364 [2022-11-03 04:05:05,341 INFO L226 Difference]: Without dead ends: 20498 [2022-11-03 04:05:05,346 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 732 GetRequests, 713 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2022-11-03 04:05:05,346 INFO L413 NwaCegarLoop]: 490 mSDtfsCounter, 560 mSDsluCounter, 624 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 560 SdHoareTripleChecker+Valid, 1114 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:05:05,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [560 Valid, 1114 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:05:05,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20498 states. [2022-11-03 04:05:05,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20498 to 9936. [2022-11-03 04:05:05,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9936 states, 9935 states have (on average 1.3293407146451937) internal successors, (13207), 9935 states have internal predecessors, (13207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:05:05,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9936 states to 9936 states and 13207 transitions. [2022-11-03 04:05:05,632 INFO L78 Accepts]: Start accepts. Automaton has 9936 states and 13207 transitions. Word has length 243 [2022-11-03 04:05:05,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:05:05,633 INFO L495 AbstractCegarLoop]: Abstraction has 9936 states and 13207 transitions. [2022-11-03 04:05:05,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 46.2) internal successors, (231), 5 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:05:05,633 INFO L276 IsEmpty]: Start isEmpty. Operand 9936 states and 13207 transitions. [2022-11-03 04:05:05,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-11-03 04:05:05,638 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:05:05,638 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:05:05,642 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (152)] Ended with exit code 0 [2022-11-03 04:05:05,852 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (151)] Ended with exit code 0 [2022-11-03 04:05:06,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,151 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:05:06,040 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:05:06,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:05:06,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1835718691, now seen corresponding path program 1 times [2022-11-03 04:05:06,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:05:06,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1624068349] [2022-11-03 04:05:06,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:05:06,041 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:05:06,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:05:06,042 INFO L229 MonitoredProcess]: Starting monitored process 153 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:05:06,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (153)] Waiting until timeout for monitored process [2022-11-03 04:05:06,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:05:06,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 04:05:06,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:05:07,506 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 73 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:05:07,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:05:08,497 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 73 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:05:08,498 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:05:08,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1624068349] [2022-11-03 04:05:08,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1624068349] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:05:08,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2027662717] [2022-11-03 04:05:08,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:05:08,498 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:05:08,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:05:08,499 INFO L229 MonitoredProcess]: Starting monitored process 154 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:05:08,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (154)] Waiting until timeout for monitored process [2022-11-03 04:05:09,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:05:09,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:05:09,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:05:09,378 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 04:05:09,378 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:05:09,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2027662717] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:05:09,379 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:05:09,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9, 9] total 18 [2022-11-03 04:05:09,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761847667] [2022-11-03 04:05:09,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:05:09,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:05:09,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:05:09,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:05:09,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2022-11-03 04:05:09,381 INFO L87 Difference]: Start difference. First operand 9936 states and 13207 transitions. Second operand has 5 states, 5 states have (on average 46.2) internal successors, (231), 5 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:05:10,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:05:10,101 INFO L93 Difference]: Finished difference Result 28322 states and 37734 transitions. [2022-11-03 04:05:10,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 04:05:10,102 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 46.2) internal successors, (231), 5 states have internal predecessors, (231), 0 states have call successors, (0), 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 243 [2022-11-03 04:05:10,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:05:10,115 INFO L225 Difference]: With dead ends: 28322 [2022-11-03 04:05:10,115 INFO L226 Difference]: Without dead ends: 20384 [2022-11-03 04:05:10,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 732 GetRequests, 713 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2022-11-03 04:05:10,122 INFO L413 NwaCegarLoop]: 489 mSDtfsCounter, 565 mSDsluCounter, 643 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 565 SdHoareTripleChecker+Valid, 1132 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:05:10,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [565 Valid, 1132 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:05:10,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20384 states. [2022-11-03 04:05:10,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20384 to 10188. [2022-11-03 04:05:10,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10188 states, 10187 states have (on average 1.3308137822715225) internal successors, (13557), 10187 states have internal predecessors, (13557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:05:10,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10188 states to 10188 states and 13557 transitions. [2022-11-03 04:05:10,487 INFO L78 Accepts]: Start accepts. Automaton has 10188 states and 13557 transitions. Word has length 243 [2022-11-03 04:05:10,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:05:10,488 INFO L495 AbstractCegarLoop]: Abstraction has 10188 states and 13557 transitions. [2022-11-03 04:05:10,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 46.2) internal successors, (231), 5 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:05:10,488 INFO L276 IsEmpty]: Start isEmpty. Operand 10188 states and 13557 transitions. [2022-11-03 04:05:10,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-11-03 04:05:10,495 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:05:10,495 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:05:10,516 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (153)] Ended with exit code 0 [2022-11-03 04:05:10,713 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (154)] Forceful destruction successful, exit code 0 [2022-11-03 04:05:10,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,154 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:05:10,909 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:05:10,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:05:10,909 INFO L85 PathProgramCache]: Analyzing trace with hash 870900703, now seen corresponding path program 1 times [2022-11-03 04:05:10,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:05:10,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2073567374] [2022-11-03 04:05:10,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:05:10,910 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:05:10,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:05:10,911 INFO L229 MonitoredProcess]: Starting monitored process 155 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:05:10,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (155)] Waiting until timeout for monitored process [2022-11-03 04:05:11,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:05:11,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 04:05:11,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:05:12,383 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 73 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:05:12,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:05:13,344 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 73 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:05:13,344 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:05:13,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2073567374] [2022-11-03 04:05:13,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2073567374] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:05:13,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [711658593] [2022-11-03 04:05:13,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:05:13,345 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:05:13,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:05:13,346 INFO L229 MonitoredProcess]: Starting monitored process 156 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:05:13,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (156)] Waiting until timeout for monitored process [2022-11-03 04:05:14,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:05:14,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:05:14,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:05:14,200 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 04:05:14,201 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:05:14,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [711658593] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:05:14,201 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:05:14,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9, 9] total 18 [2022-11-03 04:05:14,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034673729] [2022-11-03 04:05:14,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:05:14,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:05:14,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:05:14,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:05:14,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2022-11-03 04:05:14,202 INFO L87 Difference]: Start difference. First operand 10188 states and 13557 transitions. Second operand has 5 states, 5 states have (on average 46.2) internal successors, (231), 5 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:05:14,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:05:14,890 INFO L93 Difference]: Finished difference Result 28514 states and 37957 transitions. [2022-11-03 04:05:14,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 04:05:14,891 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 46.2) internal successors, (231), 5 states have internal predecessors, (231), 0 states have call successors, (0), 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 243 [2022-11-03 04:05:14,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:05:14,902 INFO L225 Difference]: With dead ends: 28514 [2022-11-03 04:05:14,902 INFO L226 Difference]: Without dead ends: 20324 [2022-11-03 04:05:14,908 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 732 GetRequests, 713 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2022-11-03 04:05:14,908 INFO L413 NwaCegarLoop]: 488 mSDtfsCounter, 565 mSDsluCounter, 647 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 565 SdHoareTripleChecker+Valid, 1135 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:05:14,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [565 Valid, 1135 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:05:14,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20324 states. [2022-11-03 04:05:15,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20324 to 10260. [2022-11-03 04:05:15,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10260 states, 10259 states have (on average 1.3300516619553562) internal successors, (13645), 10259 states have internal predecessors, (13645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:05:15,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10260 states to 10260 states and 13645 transitions. [2022-11-03 04:05:15,195 INFO L78 Accepts]: Start accepts. Automaton has 10260 states and 13645 transitions. Word has length 243 [2022-11-03 04:05:15,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:05:15,195 INFO L495 AbstractCegarLoop]: Abstraction has 10260 states and 13645 transitions. [2022-11-03 04:05:15,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 46.2) internal successors, (231), 5 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:05:15,196 INFO L276 IsEmpty]: Start isEmpty. Operand 10260 states and 13645 transitions. [2022-11-03 04:05:15,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-11-03 04:05:15,202 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:05:15,203 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:05:15,210 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (156)] Forceful destruction successful, exit code 0 [2022-11-03 04:05:15,420 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (155)] Ended with exit code 0 [2022-11-03 04:05:15,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,155 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:05:15,608 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:05:15,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:05:15,608 INFO L85 PathProgramCache]: Analyzing trace with hash 284094689, now seen corresponding path program 1 times [2022-11-03 04:05:15,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:05:15,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1185201354] [2022-11-03 04:05:15,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:05:15,610 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:05:15,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:05:15,611 INFO L229 MonitoredProcess]: Starting monitored process 157 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:05:15,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (157)] Waiting until timeout for monitored process [2022-11-03 04:05:16,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:05:16,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 04:05:16,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:05:17,081 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 73 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:05:17,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:05:18,033 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 73 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:05:18,034 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:05:18,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1185201354] [2022-11-03 04:05:18,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1185201354] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:05:18,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1891742420] [2022-11-03 04:05:18,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:05:18,035 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:05:18,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:05:18,036 INFO L229 MonitoredProcess]: Starting monitored process 158 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:05:18,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (158)] Waiting until timeout for monitored process [2022-11-03 04:05:18,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:05:18,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 04:05:18,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:05:19,705 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 73 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:05:19,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:05:21,167 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 73 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:05:21,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1891742420] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:05:21,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432838532] [2022-11-03 04:05:21,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:05:21,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:05:21,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:05:21,169 INFO L229 MonitoredProcess]: Starting monitored process 159 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:05:21,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Waiting until timeout for monitored process [2022-11-03 04:05:21,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:05:21,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 04:05:21,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:05:21,842 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 77 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-03 04:05:21,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:05:21,924 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-03 04:05:21,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432838532] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 04:05:21,924 INFO L184 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2022-11-03 04:05:21,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9, 9, 10, 10, 6] total 31 [2022-11-03 04:05:21,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441601941] [2022-11-03 04:05:21,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:05:21,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:05:21,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:05:21,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:05:21,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2022-11-03 04:05:21,926 INFO L87 Difference]: Start difference. First operand 10260 states and 13645 transitions. Second operand has 5 states, 5 states have (on average 42.2) internal successors, (211), 5 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:05:22,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:05:22,352 INFO L93 Difference]: Finished difference Result 26800 states and 35757 transitions. [2022-11-03 04:05:22,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:05:22,352 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 42.2) internal successors, (211), 5 states have internal predecessors, (211), 0 states have call successors, (0), 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 243 [2022-11-03 04:05:22,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:05:22,365 INFO L225 Difference]: With dead ends: 26800 [2022-11-03 04:05:22,365 INFO L226 Difference]: Without dead ends: 18538 [2022-11-03 04:05:22,371 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1454 GetRequests, 1420 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2022-11-03 04:05:22,371 INFO L413 NwaCegarLoop]: 238 mSDtfsCounter, 175 mSDsluCounter, 614 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 852 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:05:22,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 852 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 36 Unchecked, 0.0s Time] [2022-11-03 04:05:22,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18538 states. [2022-11-03 04:05:22,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18538 to 10516. [2022-11-03 04:05:22,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10516 states, 10515 states have (on average 1.325059438896814) internal successors, (13933), 10515 states have internal predecessors, (13933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:05:22,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10516 states to 10516 states and 13933 transitions. [2022-11-03 04:05:22,670 INFO L78 Accepts]: Start accepts. Automaton has 10516 states and 13933 transitions. Word has length 243 [2022-11-03 04:05:22,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:05:22,670 INFO L495 AbstractCegarLoop]: Abstraction has 10516 states and 13933 transitions. [2022-11-03 04:05:22,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.2) internal successors, (211), 5 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:05:22,671 INFO L276 IsEmpty]: Start isEmpty. Operand 10516 states and 13933 transitions. [2022-11-03 04:05:22,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-11-03 04:05:22,676 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:05:22,676 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:05:22,683 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (158)] Ended with exit code 0 [2022-11-03 04:05:22,902 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Forceful destruction successful, exit code 0 [2022-11-03 04:05:23,091 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (157)] Ended with exit code 0 [2022-11-03 04:05:23,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,159 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,157 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:05:23,279 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:05:23,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:05:23,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1626947869, now seen corresponding path program 1 times [2022-11-03 04:05:23,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:05:23,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [228911522] [2022-11-03 04:05:23,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:05:23,283 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:05:23,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:05:23,284 INFO L229 MonitoredProcess]: Starting monitored process 160 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:05:23,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (160)] Waiting until timeout for monitored process [2022-11-03 04:05:23,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:05:23,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 110 conjunts are in the unsatisfiable core [2022-11-03 04:05:23,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:05:31,257 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:05:31,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:05:46,529 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:05:46,529 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:05:46,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [228911522] [2022-11-03 04:05:46,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [228911522] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:05:46,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2043755880] [2022-11-03 04:05:46,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:05:46,530 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:05:46,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:05:46,531 INFO L229 MonitoredProcess]: Starting monitored process 161 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:05:46,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (161)] Waiting until timeout for monitored process [2022-11-03 04:05:47,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:05:47,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 110 conjunts are in the unsatisfiable core [2022-11-03 04:05:47,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:05:52,612 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:05:52,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:05:54,340 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:05:54,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2043755880] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:05:54,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228299463] [2022-11-03 04:05:54,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:05:54,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:05:54,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:05:54,341 INFO L229 MonitoredProcess]: Starting monitored process 162 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:05:54,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Waiting until timeout for monitored process [2022-11-03 04:05:54,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:05:54,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 113 conjunts are in the unsatisfiable core [2022-11-03 04:05:54,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:05:59,805 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:05:59,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:06:01,666 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:06:01,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228299463] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:06:01,666 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:06:01,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52, 52, 52, 53, 53] total 104 [2022-11-03 04:06:01,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36728015] [2022-11-03 04:06:01,667 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:06:01,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-11-03 04:06:01,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:06:01,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-11-03 04:06:01,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=425, Invalid=10287, Unknown=0, NotChecked=0, Total=10712 [2022-11-03 04:06:01,669 INFO L87 Difference]: Start difference. First operand 10516 states and 13933 transitions. Second operand has 104 states, 104 states have (on average 4.6923076923076925) internal successors, (488), 104 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:08:21,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:08:21,717 INFO L93 Difference]: Finished difference Result 97376 states and 130542 transitions. [2022-11-03 04:08:21,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 467 states. [2022-11-03 04:08:21,717 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 4.6923076923076925) internal successors, (488), 104 states have internal predecessors, (488), 0 states have call successors, (0), 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 243 [2022-11-03 04:08:21,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:08:21,785 INFO L225 Difference]: With dead ends: 97376 [2022-11-03 04:08:21,785 INFO L226 Difference]: Without dead ends: 97374 [2022-11-03 04:08:21,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1947 GetRequests, 1369 SyntacticMatches, 13 SemanticMatches, 565 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112241 ImplicationChecksByTransitivity, 143.2s TimeCoverageRelationStatistics Valid=39919, Invalid=281003, Unknown=0, NotChecked=0, Total=320922 [2022-11-03 04:08:21,810 INFO L413 NwaCegarLoop]: 466 mSDtfsCounter, 15958 mSDsluCounter, 28824 mSDsCounter, 0 mSdLazyCounter, 8018 mSolverCounterSat, 655 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15958 SdHoareTripleChecker+Valid, 29290 SdHoareTripleChecker+Invalid, 30465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 655 IncrementalHoareTripleChecker+Valid, 8018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21792 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:08:21,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15958 Valid, 29290 Invalid, 30465 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [655 Valid, 8018 Invalid, 0 Unknown, 21792 Unchecked, 8.1s Time] [2022-11-03 04:08:21,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97374 states. [2022-11-03 04:08:22,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97374 to 17612. [2022-11-03 04:08:22,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17612 states, 17611 states have (on average 1.3337118846175686) internal successors, (23488), 17611 states have internal predecessors, (23488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:08:22,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17612 states to 17612 states and 23488 transitions. [2022-11-03 04:08:22,764 INFO L78 Accepts]: Start accepts. Automaton has 17612 states and 23488 transitions. Word has length 243 [2022-11-03 04:08:22,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:08:22,764 INFO L495 AbstractCegarLoop]: Abstraction has 17612 states and 23488 transitions. [2022-11-03 04:08:22,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 4.6923076923076925) internal successors, (488), 104 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:08:22,764 INFO L276 IsEmpty]: Start isEmpty. Operand 17612 states and 23488 transitions. [2022-11-03 04:08:22,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-11-03 04:08:22,772 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:08:22,772 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:08:22,778 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (161)] Forceful destruction successful, exit code 0 [2022-11-03 04:08:22,986 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (160)] Ended with exit code 0 [2022-11-03 04:08:23,197 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Ended with exit code 0 [2022-11-03 04:08:23,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,160 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,162 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:08:23,373 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:08:23,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:08:23,373 INFO L85 PathProgramCache]: Analyzing trace with hash 406446177, now seen corresponding path program 1 times [2022-11-03 04:08:23,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:08:23,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2001542373] [2022-11-03 04:08:23,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:08:23,374 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:08:23,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:08:23,376 INFO L229 MonitoredProcess]: Starting monitored process 163 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:08:23,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (163)] Waiting until timeout for monitored process [2022-11-03 04:08:23,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:08:23,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 04:08:23,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:08:24,018 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 103 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 04:08:24,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:08:24,050 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 116 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 04:08:24,050 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:08:24,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2001542373] [2022-11-03 04:08:24,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2001542373] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 04:08:24,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 04:08:24,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 8 [2022-11-03 04:08:24,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76985605] [2022-11-03 04:08:24,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:08:24,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:08:24,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:08:24,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:08:24,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:08:24,052 INFO L87 Difference]: Start difference. First operand 17612 states and 23488 transitions. Second operand has 5 states, 5 states have (on average 47.4) internal successors, (237), 5 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:08:24,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:08:24,818 INFO L93 Difference]: Finished difference Result 31962 states and 42650 transitions. [2022-11-03 04:08:24,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:08:24,819 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 47.4) internal successors, (237), 5 states have internal predecessors, (237), 0 states have call successors, (0), 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 243 [2022-11-03 04:08:24,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:08:24,830 INFO L225 Difference]: With dead ends: 31962 [2022-11-03 04:08:24,830 INFO L226 Difference]: Without dead ends: 17684 [2022-11-03 04:08:24,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 480 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-11-03 04:08:24,837 INFO L413 NwaCegarLoop]: 280 mSDtfsCounter, 456 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 456 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:08:24,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [456 Valid, 592 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:08:24,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17684 states. [2022-11-03 04:08:25,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17684 to 17612. [2022-11-03 04:08:25,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17612 states, 17611 states have (on average 1.3303049230594515) internal successors, (23428), 17611 states have internal predecessors, (23428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:08:25,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17612 states to 17612 states and 23428 transitions. [2022-11-03 04:08:25,665 INFO L78 Accepts]: Start accepts. Automaton has 17612 states and 23428 transitions. Word has length 243 [2022-11-03 04:08:25,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:08:25,665 INFO L495 AbstractCegarLoop]: Abstraction has 17612 states and 23428 transitions. [2022-11-03 04:08:25,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 47.4) internal successors, (237), 5 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:08:25,665 INFO L276 IsEmpty]: Start isEmpty. Operand 17612 states and 23428 transitions. [2022-11-03 04:08:25,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-11-03 04:08:25,673 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:08:25,674 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:08:25,689 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (163)] Ended with exit code 0 [2022-11-03 04:08:25,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:08:25,874 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:08:25,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:08:25,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1742417759, now seen corresponding path program 1 times [2022-11-03 04:08:25,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:08:25,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1361570532] [2022-11-03 04:08:25,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:08:25,875 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:08:25,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:08:25,876 INFO L229 MonitoredProcess]: Starting monitored process 164 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:08:25,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (164)] Waiting until timeout for monitored process [2022-11-03 04:08:26,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:08:26,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 04:08:26,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:08:26,557 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 117 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:08:26,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:08:26,776 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 117 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:08:26,776 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:08:26,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1361570532] [2022-11-03 04:08:26,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1361570532] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:08:26,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [846759696] [2022-11-03 04:08:26,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:08:26,777 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:08:26,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:08:26,777 INFO L229 MonitoredProcess]: Starting monitored process 165 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:08:26,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (165)] Waiting until timeout for monitored process [2022-11-03 04:08:27,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:08:27,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 04:08:27,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:08:27,970 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 117 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:08:27,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:08:28,190 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 117 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:08:28,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [846759696] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:08:28,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037855306] [2022-11-03 04:08:28,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:08:28,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:08:28,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:08:28,192 INFO L229 MonitoredProcess]: Starting monitored process 166 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:08:28,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Waiting until timeout for monitored process [2022-11-03 04:08:28,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:08:28,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 04:08:28,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:08:28,874 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 117 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:08:28,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:08:29,108 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 117 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:08:29,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037855306] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:08:29,109 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:08:29,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 11 [2022-11-03 04:08:29,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814828515] [2022-11-03 04:08:29,109 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:08:29,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-03 04:08:29,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:08:29,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-03 04:08:29,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-11-03 04:08:29,111 INFO L87 Difference]: Start difference. First operand 17612 states and 23428 transitions. Second operand has 11 states, 11 states have (on average 24.09090909090909) internal successors, (265), 11 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:08:30,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:08:30,721 INFO L93 Difference]: Finished difference Result 52801 states and 71367 transitions. [2022-11-03 04:08:30,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-03 04:08:30,721 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 24.09090909090909) internal successors, (265), 11 states have internal predecessors, (265), 0 states have call successors, (0), 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 243 [2022-11-03 04:08:30,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:08:30,741 INFO L225 Difference]: With dead ends: 52801 [2022-11-03 04:08:30,741 INFO L226 Difference]: Without dead ends: 38139 [2022-11-03 04:08:30,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1465 GetRequests, 1443 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2022-11-03 04:08:30,748 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 4510 mSDsluCounter, 571 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4510 SdHoareTripleChecker+Valid, 728 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 04:08:30,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4510 Valid, 728 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 04:08:30,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38139 states. [2022-11-03 04:08:31,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38139 to 17302. [2022-11-03 04:08:31,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17302 states, 17301 states have (on average 1.32437431362349) internal successors, (22913), 17301 states have internal predecessors, (22913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:08:31,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17302 states to 17302 states and 22913 transitions. [2022-11-03 04:08:31,396 INFO L78 Accepts]: Start accepts. Automaton has 17302 states and 22913 transitions. Word has length 243 [2022-11-03 04:08:31,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:08:31,396 INFO L495 AbstractCegarLoop]: Abstraction has 17302 states and 22913 transitions. [2022-11-03 04:08:31,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 24.09090909090909) internal successors, (265), 11 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:08:31,397 INFO L276 IsEmpty]: Start isEmpty. Operand 17302 states and 22913 transitions. [2022-11-03 04:08:31,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-11-03 04:08:31,405 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:08:31,405 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:08:31,456 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Ended with exit code 0 [2022-11-03 04:08:31,633 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (164)] Ended with exit code 0 [2022-11-03 04:08:31,810 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (165)] Ended with exit code 0 [2022-11-03 04:08:32,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,164 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,165 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:08:32,006 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:08:32,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:08:32,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1279162015, now seen corresponding path program 1 times [2022-11-03 04:08:32,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:08:32,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [4360658] [2022-11-03 04:08:32,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:08:32,008 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:08:32,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:08:32,009 INFO L229 MonitoredProcess]: Starting monitored process 167 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:08:32,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (167)] Waiting until timeout for monitored process [2022-11-03 04:08:32,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:08:32,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 04:08:32,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:08:32,852 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 04:08:32,852 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:08:32,852 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:08:32,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [4360658] [2022-11-03 04:08:32,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [4360658] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:08:32,853 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:08:32,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 04:08:32,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671088054] [2022-11-03 04:08:32,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:08:32,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 04:08:32,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:08:32,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 04:08:32,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:08:32,854 INFO L87 Difference]: Start difference. First operand 17302 states and 22913 transitions. Second operand has 7 states, 7 states have (on average 33.0) internal successors, (231), 7 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:08:33,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:08:33,273 INFO L93 Difference]: Finished difference Result 31798 states and 42085 transitions. [2022-11-03 04:08:33,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 04:08:33,274 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 33.0) internal successors, (231), 7 states have internal predecessors, (231), 0 states have call successors, (0), 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 243 [2022-11-03 04:08:33,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:08:33,284 INFO L225 Difference]: With dead ends: 31798 [2022-11-03 04:08:33,284 INFO L226 Difference]: Without dead ends: 16502 [2022-11-03 04:08:33,289 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:08:33,290 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 119 mSDsluCounter, 541 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 694 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:08:33,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 694 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 48 Unchecked, 0.0s Time] [2022-11-03 04:08:33,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16502 states. [2022-11-03 04:08:33,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16502 to 16502. [2022-11-03 04:08:33,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16502 states, 16501 states have (on average 1.3211926549906066) internal successors, (21801), 16501 states have internal predecessors, (21801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:08:33,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16502 states to 16502 states and 21801 transitions. [2022-11-03 04:08:33,869 INFO L78 Accepts]: Start accepts. Automaton has 16502 states and 21801 transitions. Word has length 243 [2022-11-03 04:08:33,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:08:33,869 INFO L495 AbstractCegarLoop]: Abstraction has 16502 states and 21801 transitions. [2022-11-03 04:08:33,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 33.0) internal successors, (231), 7 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:08:33,869 INFO L276 IsEmpty]: Start isEmpty. Operand 16502 states and 21801 transitions. [2022-11-03 04:08:33,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-11-03 04:08:33,878 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:08:33,878 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:08:33,890 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (167)] Ended with exit code 0 [2022-11-03 04:08:34,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:08:34,079 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:08:34,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:08:34,079 INFO L85 PathProgramCache]: Analyzing trace with hash 593786273, now seen corresponding path program 1 times [2022-11-03 04:08:34,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:08:34,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [844137143] [2022-11-03 04:08:34,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:08:34,080 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:08:34,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:08:34,081 INFO L229 MonitoredProcess]: Starting monitored process 168 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:08:34,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (168)] Waiting until timeout for monitored process [2022-11-03 04:08:34,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:08:34,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 04:08:34,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:08:34,760 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-03 04:08:34,760 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:08:34,760 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:08:34,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [844137143] [2022-11-03 04:08:34,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [844137143] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:08:34,760 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:08:34,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 04:08:34,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378721637] [2022-11-03 04:08:34,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:08:34,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 04:08:34,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:08:34,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 04:08:34,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:08:34,761 INFO L87 Difference]: Start difference. First operand 16502 states and 21801 transitions. Second operand has 7 states, 7 states have (on average 29.428571428571427) internal successors, (206), 7 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:08:35,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:08:35,186 INFO L93 Difference]: Finished difference Result 30806 states and 40765 transitions. [2022-11-03 04:08:35,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 04:08:35,187 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 29.428571428571427) internal successors, (206), 7 states have internal predecessors, (206), 0 states have call successors, (0), 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 243 [2022-11-03 04:08:35,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:08:35,196 INFO L225 Difference]: With dead ends: 30806 [2022-11-03 04:08:35,196 INFO L226 Difference]: Without dead ends: 15494 [2022-11-03 04:08:35,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:08:35,202 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 44 mSDsluCounter, 754 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 919 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:08:35,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 919 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 69 Unchecked, 0.0s Time] [2022-11-03 04:08:35,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15494 states. [2022-11-03 04:08:35,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15494 to 15494. [2022-11-03 04:08:35,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15494 states, 15493 states have (on average 1.322210030336281) internal successors, (20485), 15493 states have internal predecessors, (20485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:08:35,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15494 states to 15494 states and 20485 transitions. [2022-11-03 04:08:35,683 INFO L78 Accepts]: Start accepts. Automaton has 15494 states and 20485 transitions. Word has length 243 [2022-11-03 04:08:35,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:08:35,683 INFO L495 AbstractCegarLoop]: Abstraction has 15494 states and 20485 transitions. [2022-11-03 04:08:35,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 29.428571428571427) internal successors, (206), 7 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:08:35,683 INFO L276 IsEmpty]: Start isEmpty. Operand 15494 states and 20485 transitions. [2022-11-03 04:08:35,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-11-03 04:08:35,690 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:08:35,690 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:08:35,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (168)] Forceful destruction successful, exit code 0 [2022-11-03 04:08:35,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:08:35,890 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:08:35,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:08:35,891 INFO L85 PathProgramCache]: Analyzing trace with hash 413129731, now seen corresponding path program 1 times [2022-11-03 04:08:35,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:08:35,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [976968798] [2022-11-03 04:08:35,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:08:35,893 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:08:35,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:08:35,894 INFO L229 MonitoredProcess]: Starting monitored process 169 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:08:35,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (169)] Waiting until timeout for monitored process [2022-11-03 04:08:36,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:08:36,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 04:08:36,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:08:36,563 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-11-03 04:08:36,564 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:08:36,564 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:08:36,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [976968798] [2022-11-03 04:08:36,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [976968798] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:08:36,564 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:08:36,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 04:08:36,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262742829] [2022-11-03 04:08:36,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:08:36,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 04:08:36,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:08:36,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 04:08:36,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:08:36,565 INFO L87 Difference]: Start difference. First operand 15494 states and 20485 transitions. Second operand has 7 states, 7 states have (on average 27.714285714285715) internal successors, (194), 7 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:08:37,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:08:37,000 INFO L93 Difference]: Finished difference Result 29590 states and 39229 transitions. [2022-11-03 04:08:37,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 04:08:37,001 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 27.714285714285715) internal successors, (194), 7 states have internal predecessors, (194), 0 states have call successors, (0), 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 243 [2022-11-03 04:08:37,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:08:37,009 INFO L225 Difference]: With dead ends: 29590 [2022-11-03 04:08:37,009 INFO L226 Difference]: Without dead ends: 14842 [2022-11-03 04:08:37,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:08:37,012 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 39 mSDsluCounter, 757 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 924 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:08:37,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 924 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 68 Unchecked, 0.0s Time] [2022-11-03 04:08:37,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14842 states. [2022-11-03 04:08:37,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14842 to 14842. [2022-11-03 04:08:37,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14842 states, 14841 states have (on average 1.3251802439188733) internal successors, (19667), 14841 states have internal predecessors, (19667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:08:37,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14842 states to 14842 states and 19667 transitions. [2022-11-03 04:08:37,506 INFO L78 Accepts]: Start accepts. Automaton has 14842 states and 19667 transitions. Word has length 243 [2022-11-03 04:08:37,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:08:37,506 INFO L495 AbstractCegarLoop]: Abstraction has 14842 states and 19667 transitions. [2022-11-03 04:08:37,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 27.714285714285715) internal successors, (194), 7 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:08:37,506 INFO L276 IsEmpty]: Start isEmpty. Operand 14842 states and 19667 transitions. [2022-11-03 04:08:37,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-11-03 04:08:37,513 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:08:37,513 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:08:37,528 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (169)] Ended with exit code 0 [2022-11-03 04:08:37,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:08:37,714 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:08:37,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:08:37,714 INFO L85 PathProgramCache]: Analyzing trace with hash 170225341, now seen corresponding path program 1 times [2022-11-03 04:08:37,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:08:37,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1433987335] [2022-11-03 04:08:37,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:08:37,716 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:08:37,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:08:37,717 INFO L229 MonitoredProcess]: Starting monitored process 170 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:08:37,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (170)] Waiting until timeout for monitored process [2022-11-03 04:08:38,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:08:38,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 04:08:38,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:08:38,597 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 119 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:08:38,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:08:38,984 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 119 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:08:38,984 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:08:38,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1433987335] [2022-11-03 04:08:38,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1433987335] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:08:38,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1495114922] [2022-11-03 04:08:38,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:08:38,985 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:08:38,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:08:38,986 INFO L229 MonitoredProcess]: Starting monitored process 171 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:08:38,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (171)] Waiting until timeout for monitored process [2022-11-03 04:08:39,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:08:39,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 04:08:39,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:08:40,304 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 119 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:08:40,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:08:40,663 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 119 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:08:40,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1495114922] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:08:40,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928154171] [2022-11-03 04:08:40,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:08:40,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:08:40,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:08:40,665 INFO L229 MonitoredProcess]: Starting monitored process 172 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:08:40,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Waiting until timeout for monitored process [2022-11-03 04:08:41,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:08:41,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 04:08:41,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:08:41,724 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 85 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:08:41,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:08:42,278 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 85 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:08:42,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928154171] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:08:42,278 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:08:42,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 11, 11] total 31 [2022-11-03 04:08:42,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630473785] [2022-11-03 04:08:42,279 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:08:42,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-03 04:08:42,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:08:42,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-03 04:08:42,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=857, Unknown=0, NotChecked=0, Total=930 [2022-11-03 04:08:42,281 INFO L87 Difference]: Start difference. First operand 14842 states and 19667 transitions. Second operand has 31 states, 31 states have (on average 22.0) internal successors, (682), 31 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:08:45,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:08:45,803 INFO L93 Difference]: Finished difference Result 89546 states and 119388 transitions. [2022-11-03 04:08:45,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-03 04:08:45,803 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 22.0) internal successors, (682), 31 states have internal predecessors, (682), 0 states have call successors, (0), 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 243 [2022-11-03 04:08:45,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:08:45,857 INFO L225 Difference]: With dead ends: 89546 [2022-11-03 04:08:45,857 INFO L226 Difference]: Without dead ends: 75450 [2022-11-03 04:08:45,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1493 GetRequests, 1422 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1048 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=997, Invalid=4115, Unknown=0, NotChecked=0, Total=5112 [2022-11-03 04:08:45,865 INFO L413 NwaCegarLoop]: 531 mSDtfsCounter, 5752 mSDsluCounter, 6720 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5752 SdHoareTripleChecker+Valid, 7251 SdHoareTripleChecker+Invalid, 796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 273 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 04:08:45,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5752 Valid, 7251 Invalid, 796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 447 Invalid, 0 Unknown, 273 Unchecked, 0.6s Time] [2022-11-03 04:08:45,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75450 states. [2022-11-03 04:08:46,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75450 to 14933. [2022-11-03 04:08:46,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14933 states, 14932 states have (on average 1.3246048754353068) internal successors, (19779), 14932 states have internal predecessors, (19779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:08:46,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14933 states to 14933 states and 19779 transitions. [2022-11-03 04:08:46,513 INFO L78 Accepts]: Start accepts. Automaton has 14933 states and 19779 transitions. Word has length 243 [2022-11-03 04:08:46,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:08:46,514 INFO L495 AbstractCegarLoop]: Abstraction has 14933 states and 19779 transitions. [2022-11-03 04:08:46,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 22.0) internal successors, (682), 31 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:08:46,514 INFO L276 IsEmpty]: Start isEmpty. Operand 14933 states and 19779 transitions. [2022-11-03 04:08:46,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-11-03 04:08:46,523 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:08:46,523 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:08:46,586 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Forceful destruction successful, exit code 0 [2022-11-03 04:08:46,743 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (170)] Ended with exit code 0 [2022-11-03 04:08:46,929 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (171)] Ended with exit code 0 [2022-11-03 04:08:47,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 172 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,170 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,171 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:08:47,124 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:08:47,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:08:47,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1306537533, now seen corresponding path program 1 times [2022-11-03 04:08:47,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:08:47,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1553437710] [2022-11-03 04:08:47,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:08:47,125 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:08:47,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:08:47,126 INFO L229 MonitoredProcess]: Starting monitored process 173 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:08:47,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (173)] Waiting until timeout for monitored process [2022-11-03 04:08:47,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:08:47,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 04:08:47,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:08:48,060 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 113 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:08:48,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:08:48,485 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 113 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:08:48,485 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:08:48,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1553437710] [2022-11-03 04:08:48,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1553437710] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:08:48,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1528854520] [2022-11-03 04:08:48,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:08:48,486 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:08:48,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:08:48,487 INFO L229 MonitoredProcess]: Starting monitored process 174 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:08:48,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (174)] Waiting until timeout for monitored process [2022-11-03 04:08:49,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:08:49,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 04:08:49,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:08:49,865 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 113 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:08:49,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:08:50,227 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 113 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:08:50,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1528854520] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:08:50,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583707875] [2022-11-03 04:08:50,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:08:50,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:08:50,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:08:50,228 INFO L229 MonitoredProcess]: Starting monitored process 175 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:08:50,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Waiting until timeout for monitored process [2022-11-03 04:08:50,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:08:50,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 04:08:50,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:08:51,319 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 101 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:08:51,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:08:51,882 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 101 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:08:51,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583707875] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:08:51,882 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:08:51,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 12, 12] total 32 [2022-11-03 04:08:51,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688789685] [2022-11-03 04:08:51,883 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:08:51,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-03 04:08:51,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:08:51,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-03 04:08:51,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=917, Unknown=0, NotChecked=0, Total=992 [2022-11-03 04:08:51,885 INFO L87 Difference]: Start difference. First operand 14933 states and 19779 transitions. Second operand has 32 states, 32 states have (on average 20.46875) internal successors, (655), 32 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:09:01,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:09:01,701 INFO L93 Difference]: Finished difference Result 164780 states and 222301 transitions. [2022-11-03 04:09:01,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-11-03 04:09:01,702 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 20.46875) internal successors, (655), 32 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 243 [2022-11-03 04:09:01,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:09:01,911 INFO L225 Difference]: With dead ends: 164780 [2022-11-03 04:09:01,911 INFO L226 Difference]: Without dead ends: 150672 [2022-11-03 04:09:01,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1558 GetRequests, 1421 SyntacticMatches, 1 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6219 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=3282, Invalid=15624, Unknown=0, NotChecked=0, Total=18906 [2022-11-03 04:09:01,925 INFO L413 NwaCegarLoop]: 414 mSDtfsCounter, 12565 mSDsluCounter, 10130 mSDsCounter, 0 mSdLazyCounter, 924 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12565 SdHoareTripleChecker+Valid, 10544 SdHoareTripleChecker+Invalid, 1790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 924 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 672 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:09:01,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12565 Valid, 10544 Invalid, 1790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 924 Invalid, 0 Unknown, 672 Unchecked, 1.1s Time] [2022-11-03 04:09:01,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150672 states. [2022-11-03 04:09:03,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150672 to 15668. [2022-11-03 04:09:03,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15668 states, 15667 states have (on average 1.320546371353801) internal successors, (20689), 15667 states have internal predecessors, (20689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:09:03,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15668 states to 15668 states and 20689 transitions. [2022-11-03 04:09:03,241 INFO L78 Accepts]: Start accepts. Automaton has 15668 states and 20689 transitions. Word has length 243 [2022-11-03 04:09:03,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:09:03,241 INFO L495 AbstractCegarLoop]: Abstraction has 15668 states and 20689 transitions. [2022-11-03 04:09:03,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 20.46875) internal successors, (655), 32 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:09:03,241 INFO L276 IsEmpty]: Start isEmpty. Operand 15668 states and 20689 transitions. [2022-11-03 04:09:03,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-11-03 04:09:03,247 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:09:03,248 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:09:03,254 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (174)] Ended with exit code 0 [2022-11-03 04:09:03,462 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (173)] Ended with exit code 0 [2022-11-03 04:09:03,673 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Forceful destruction successful, exit code 0 [2022-11-03 04:09:03,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,173 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,175 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:09:03,849 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:09:03,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:09:03,849 INFO L85 PathProgramCache]: Analyzing trace with hash 829146819, now seen corresponding path program 1 times [2022-11-03 04:09:03,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:09:03,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1184855027] [2022-11-03 04:09:03,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:09:03,851 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:09:03,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:09:03,852 INFO L229 MonitoredProcess]: Starting monitored process 176 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:09:03,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (176)] Waiting until timeout for monitored process [2022-11-03 04:09:04,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:09:04,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-03 04:09:04,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:09:05,818 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 99 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:09:05,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:09:08,610 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 99 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:09:08,610 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:09:08,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1184855027] [2022-11-03 04:09:08,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1184855027] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:09:08,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [412542223] [2022-11-03 04:09:08,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:09:08,611 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:09:08,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:09:08,612 INFO L229 MonitoredProcess]: Starting monitored process 177 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:09:08,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (177)] Waiting until timeout for monitored process [2022-11-03 04:09:09,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:09:09,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-03 04:09:09,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:09:11,185 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 99 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:09:11,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:09:12,393 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 99 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:09:12,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [412542223] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:09:12,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128749044] [2022-11-03 04:09:12,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:09:12,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:09:12,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:09:12,394 INFO L229 MonitoredProcess]: Starting monitored process 178 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:09:12,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Waiting until timeout for monitored process [2022-11-03 04:09:12,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:09:12,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 04:09:12,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:09:13,884 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 73 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:09:13,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:09:14,836 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 73 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:09:14,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128749044] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:09:14,837 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:09:14,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21, 21, 8, 8] total 49 [2022-11-03 04:09:14,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764764106] [2022-11-03 04:09:14,838 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:09:14,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-03 04:09:14,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:09:14,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-03 04:09:14,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=2235, Unknown=0, NotChecked=0, Total=2352 [2022-11-03 04:09:14,840 INFO L87 Difference]: Start difference. First operand 15668 states and 20689 transitions. Second operand has 49 states, 49 states have (on average 14.755102040816327) internal successors, (723), 49 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:09:20,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:09:20,272 INFO L93 Difference]: Finished difference Result 59452 states and 78291 transitions. [2022-11-03 04:09:20,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-03 04:09:20,272 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 14.755102040816327) internal successors, (723), 49 states have internal predecessors, (723), 0 states have call successors, (0), 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 243 [2022-11-03 04:09:20,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:09:20,299 INFO L225 Difference]: With dead ends: 59452 [2022-11-03 04:09:20,299 INFO L226 Difference]: Without dead ends: 44830 [2022-11-03 04:09:20,305 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1487 GetRequests, 1404 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 835 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=742, Invalid=6230, Unknown=0, NotChecked=0, Total=6972 [2022-11-03 04:09:20,305 INFO L413 NwaCegarLoop]: 652 mSDtfsCounter, 2518 mSDsluCounter, 17379 mSDsCounter, 0 mSdLazyCounter, 714 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2518 SdHoareTripleChecker+Valid, 18031 SdHoareTripleChecker+Invalid, 2000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1269 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 04:09:20,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2518 Valid, 18031 Invalid, 2000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 714 Invalid, 0 Unknown, 1269 Unchecked, 0.8s Time] [2022-11-03 04:09:20,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44830 states. [2022-11-03 04:09:21,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44830 to 16896. [2022-11-03 04:09:21,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16896 states, 16895 states have (on average 1.313347144125481) internal successors, (22189), 16895 states have internal predecessors, (22189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:09:21,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16896 states to 16896 states and 22189 transitions. [2022-11-03 04:09:21,106 INFO L78 Accepts]: Start accepts. Automaton has 16896 states and 22189 transitions. Word has length 243 [2022-11-03 04:09:21,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:09:21,107 INFO L495 AbstractCegarLoop]: Abstraction has 16896 states and 22189 transitions. [2022-11-03 04:09:21,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 14.755102040816327) internal successors, (723), 49 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:09:21,107 INFO L276 IsEmpty]: Start isEmpty. Operand 16896 states and 22189 transitions. [2022-11-03 04:09:21,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-11-03 04:09:21,112 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:09:21,113 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2022-11-03 04:09:21,118 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (177)] Ended with exit code 0 [2022-11-03 04:09:21,335 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Ended with exit code 0 [2022-11-03 04:09:21,526 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (176)] Ended with exit code 0 [2022-11-03 04:09:21,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,178 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,176 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:09:21,713 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:09:21,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:09:21,714 INFO L85 PathProgramCache]: Analyzing trace with hash 372791881, now seen corresponding path program 2 times [2022-11-03 04:09:21,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:09:21,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [846914353] [2022-11-03 04:09:21,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 04:09:21,715 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:09:21,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:09:21,716 INFO L229 MonitoredProcess]: Starting monitored process 179 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:09:21,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (179)] Waiting until timeout for monitored process [2022-11-03 04:09:22,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 04:09:22,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:09:22,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 154 conjunts are in the unsatisfiable core [2022-11-03 04:09:22,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:09:33,247 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:09:33,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:10:07,849 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:10:07,849 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:10:07,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [846914353] [2022-11-03 04:10:07,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [846914353] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:10:07,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [252083978] [2022-11-03 04:10:07,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 04:10:07,849 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:10:07,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:10:07,850 INFO L229 MonitoredProcess]: Starting monitored process 180 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:10:07,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (180)] Waiting until timeout for monitored process [2022-11-03 04:10:08,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 04:10:08,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:10:08,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 154 conjunts are in the unsatisfiable core [2022-11-03 04:10:08,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:10:14,433 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:10:14,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:10:16,938 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:10:16,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [252083978] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:10:16,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886789398] [2022-11-03 04:10:16,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 04:10:16,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:10:16,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:10:16,939 INFO L229 MonitoredProcess]: Starting monitored process 181 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:10:16,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Waiting until timeout for monitored process [2022-11-03 04:10:17,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 04:10:17,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:10:17,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 157 conjunts are in the unsatisfiable core [2022-11-03 04:10:17,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:10:23,652 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:10:23,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:10:27,093 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:10:27,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886789398] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:10:27,094 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:10:27,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70, 70, 70, 71, 71] total 140 [2022-11-03 04:10:27,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866357534] [2022-11-03 04:10:27,095 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:10:27,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 140 states [2022-11-03 04:10:27,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:10:27,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2022-11-03 04:10:27,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=19110, Unknown=0, NotChecked=0, Total=19460 [2022-11-03 04:10:27,097 INFO L87 Difference]: Start difference. First operand 16896 states and 22189 transitions. Second operand has 140 states, 140 states have (on average 3.4857142857142858) internal successors, (488), 140 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:49,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:10:49,257 INFO L93 Difference]: Finished difference Result 27782 states and 36786 transitions. [2022-11-03 04:10:49,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-11-03 04:10:49,258 INFO L78 Accepts]: Start accepts. Automaton has has 140 states, 140 states have (on average 3.4857142857142858) internal successors, (488), 140 states have internal predecessors, (488), 0 states have call successors, (0), 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 243 [2022-11-03 04:10:49,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:10:49,278 INFO L225 Difference]: With dead ends: 27782 [2022-11-03 04:10:49,278 INFO L226 Difference]: Without dead ends: 27780 [2022-11-03 04:10:49,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1513 GetRequests, 1311 SyntacticMatches, 4 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4322 ImplicationChecksByTransitivity, 59.2s TimeCoverageRelationStatistics Valid=1327, Invalid=38473, Unknown=0, NotChecked=0, Total=39800 [2022-11-03 04:10:49,285 INFO L413 NwaCegarLoop]: 567 mSDtfsCounter, 2706 mSDsluCounter, 54023 mSDsCounter, 0 mSdLazyCounter, 3154 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2706 SdHoareTripleChecker+Valid, 54590 SdHoareTripleChecker+Invalid, 12870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 3154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9659 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-11-03 04:10:49,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2706 Valid, 54590 Invalid, 12870 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [57 Valid, 3154 Invalid, 0 Unknown, 9659 Unchecked, 3.5s Time] [2022-11-03 04:10:49,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27780 states. [2022-11-03 04:10:49,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27780 to 17628. [2022-11-03 04:10:49,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17628 states, 17627 states have (on average 1.30759630112895) internal successors, (23049), 17627 states have internal predecessors, (23049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:49,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17628 states to 17628 states and 23049 transitions. [2022-11-03 04:10:49,970 INFO L78 Accepts]: Start accepts. Automaton has 17628 states and 23049 transitions. Word has length 243 [2022-11-03 04:10:49,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:10:49,971 INFO L495 AbstractCegarLoop]: Abstraction has 17628 states and 23049 transitions. [2022-11-03 04:10:49,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 140 states, 140 states have (on average 3.4857142857142858) internal successors, (488), 140 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:49,971 INFO L276 IsEmpty]: Start isEmpty. Operand 17628 states and 23049 transitions. [2022-11-03 04:10:50,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-11-03 04:10:50,062 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:10:50,062 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-03 04:10:50,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (179)] Forceful destruction successful, exit code 0 [2022-11-03 04:10:50,268 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (180)] Ended with exit code 0 [2022-11-03 04:10:50,489 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Ended with exit code 0 [2022-11-03 04:10:50,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,180 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,181 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:10:50,663 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:10:50,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:10:50,663 INFO L85 PathProgramCache]: Analyzing trace with hash -510717109, now seen corresponding path program 1 times [2022-11-03 04:10:50,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:10:50,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1024800725] [2022-11-03 04:10:50,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:10:50,665 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:10:50,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:10:50,665 INFO L229 MonitoredProcess]: Starting monitored process 182 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:10:50,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (182)] Waiting until timeout for monitored process [2022-11-03 04:10:51,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:10:51,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-03 04:10:51,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:10:53,232 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 93 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:10:53,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:10:55,390 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 93 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:10:55,390 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:10:55,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1024800725] [2022-11-03 04:10:55,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1024800725] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:10:55,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1407868497] [2022-11-03 04:10:55,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:10:55,391 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:10:55,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:10:55,392 INFO L229 MonitoredProcess]: Starting monitored process 183 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:10:55,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (183)] Waiting until timeout for monitored process [2022-11-03 04:10:56,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:10:56,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:10:56,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:10:56,243 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 04:10:56,243 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:10:56,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1407868497] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:10:56,244 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:10:56,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [17, 17] total 33 [2022-11-03 04:10:56,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408605365] [2022-11-03 04:10:56,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:10:56,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:10:56,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:10:56,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:10:56,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=978, Unknown=0, NotChecked=0, Total=1056 [2022-11-03 04:10:56,245 INFO L87 Difference]: Start difference. First operand 17628 states and 23049 transitions. Second operand has 5 states, 5 states have (on average 45.8) internal successors, (229), 5 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:57,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:10:57,376 INFO L93 Difference]: Finished difference Result 34890 states and 45661 transitions. [2022-11-03 04:10:57,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 04:10:57,377 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 45.8) internal successors, (229), 5 states have internal predecessors, (229), 0 states have call successors, (0), 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 243 [2022-11-03 04:10:57,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:10:57,391 INFO L225 Difference]: With dead ends: 34890 [2022-11-03 04:10:57,391 INFO L226 Difference]: Without dead ends: 20012 [2022-11-03 04:10:57,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 732 GetRequests, 698 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=93, Invalid=1167, Unknown=0, NotChecked=0, Total=1260 [2022-11-03 04:10:57,399 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 692 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 692 SdHoareTripleChecker+Valid, 580 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:10:57,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [692 Valid, 580 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:10:57,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20012 states. [2022-11-03 04:10:58,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20012 to 17628. [2022-11-03 04:10:58,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17628 states, 17627 states have (on average 1.3047597435751972) internal successors, (22999), 17627 states have internal predecessors, (22999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:58,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17628 states to 17628 states and 22999 transitions. [2022-11-03 04:10:58,143 INFO L78 Accepts]: Start accepts. Automaton has 17628 states and 22999 transitions. Word has length 243 [2022-11-03 04:10:58,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:10:58,144 INFO L495 AbstractCegarLoop]: Abstraction has 17628 states and 22999 transitions. [2022-11-03 04:10:58,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 45.8) internal successors, (229), 5 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:58,144 INFO L276 IsEmpty]: Start isEmpty. Operand 17628 states and 22999 transitions. [2022-11-03 04:10:58,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-11-03 04:10:58,149 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:10:58,149 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-03 04:10:58,154 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (183)] Forceful destruction successful, exit code 0 [2022-11-03 04:10:58,362 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (182)] Ended with exit code 0 [2022-11-03 04:10:58,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,182 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:10:58,550 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:10:58,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:10:58,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1973862987, now seen corresponding path program 1 times [2022-11-03 04:10:58,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:10:58,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2082508129] [2022-11-03 04:10:58,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:10:58,552 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:10:58,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:10:58,553 INFO L229 MonitoredProcess]: Starting monitored process 184 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:10:58,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (184)] Waiting until timeout for monitored process [2022-11-03 04:10:59,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:10:59,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-03 04:10:59,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:00,923 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 97 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:00,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:11:03,115 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 97 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:03,115 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:11:03,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2082508129] [2022-11-03 04:11:03,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2082508129] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:11:03,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [704083454] [2022-11-03 04:11:03,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:03,116 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:11:03,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:11:03,117 INFO L229 MonitoredProcess]: Starting monitored process 185 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:11:03,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (185)] Waiting until timeout for monitored process [2022-11-03 04:11:03,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:03,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:11:03,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:04,000 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 04:11:04,000 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:11:04,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [704083454] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:11:04,001 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:11:04,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [17, 17] total 33 [2022-11-03 04:11:04,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092747264] [2022-11-03 04:11:04,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:11:04,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:11:04,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:11:04,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:11:04,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=978, Unknown=0, NotChecked=0, Total=1056 [2022-11-03 04:11:04,003 INFO L87 Difference]: Start difference. First operand 17628 states and 22999 transitions. Second operand has 5 states, 5 states have (on average 45.8) internal successors, (229), 5 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:05,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:11:05,170 INFO L93 Difference]: Finished difference Result 34442 states and 45099 transitions. [2022-11-03 04:11:05,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 04:11:05,171 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 45.8) internal successors, (229), 5 states have internal predecessors, (229), 0 states have call successors, (0), 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 243 [2022-11-03 04:11:05,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:11:05,185 INFO L225 Difference]: With dead ends: 34442 [2022-11-03 04:11:05,185 INFO L226 Difference]: Without dead ends: 19500 [2022-11-03 04:11:05,193 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 732 GetRequests, 698 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=93, Invalid=1167, Unknown=0, NotChecked=0, Total=1260 [2022-11-03 04:11:05,194 INFO L413 NwaCegarLoop]: 212 mSDtfsCounter, 686 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 686 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:11:05,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [686 Valid, 572 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:11:05,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19500 states. [2022-11-03 04:11:05,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19500 to 17628. [2022-11-03 04:11:05,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17628 states, 17627 states have (on average 1.3019231860214444) internal successors, (22949), 17627 states have internal predecessors, (22949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:05,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17628 states to 17628 states and 22949 transitions. [2022-11-03 04:11:05,973 INFO L78 Accepts]: Start accepts. Automaton has 17628 states and 22949 transitions. Word has length 243 [2022-11-03 04:11:05,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:11:05,973 INFO L495 AbstractCegarLoop]: Abstraction has 17628 states and 22949 transitions. [2022-11-03 04:11:05,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 45.8) internal successors, (229), 5 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:05,973 INFO L276 IsEmpty]: Start isEmpty. Operand 17628 states and 22949 transitions. [2022-11-03 04:11:05,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-11-03 04:11:05,979 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:11:05,979 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 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 04:11:05,993 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (184)] Ended with exit code 0 [2022-11-03 04:11:06,184 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (185)] Ended with exit code 0 [2022-11-03 04:11:06,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,185 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:11:06,380 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:11:06,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:11:06,380 INFO L85 PathProgramCache]: Analyzing trace with hash 143106659, now seen corresponding path program 1 times [2022-11-03 04:11:06,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:11:06,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1824222588] [2022-11-03 04:11:06,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:06,382 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:11:06,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:11:06,383 INFO L229 MonitoredProcess]: Starting monitored process 186 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:11:06,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (186)] Waiting until timeout for monitored process [2022-11-03 04:11:06,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:06,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-03 04:11:06,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:08,757 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 107 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:08,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:11:10,826 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 107 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:10,827 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:11:10,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1824222588] [2022-11-03 04:11:10,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1824222588] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:11:10,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1964340401] [2022-11-03 04:11:10,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:10,827 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:11:10,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:11:10,828 INFO L229 MonitoredProcess]: Starting monitored process 187 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:11:10,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (187)] Waiting until timeout for monitored process [2022-11-03 04:11:11,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:11,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 151 conjunts are in the unsatisfiable core [2022-11-03 04:11:11,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:26,594 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:26,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:12:09,183 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:12:09,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1964340401] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:12:09,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295550667] [2022-11-03 04:12:09,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:12:09,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:12:09,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:12:09,188 INFO L229 MonitoredProcess]: Starting monitored process 188 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:12:09,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8d42495-6582-4354-a97c-6cbe1ac1c74f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Waiting until timeout for monitored process [2022-11-03 04:12:09,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:12:09,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-03 04:12:09,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:12:13,103 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 77 proven. 31 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 04:12:13,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:12:16,436 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 77 proven. 31 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 04:12:16,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295550667] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:12:16,437 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:12:16,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 67, 67, 11, 11] total 176 [2022-11-03 04:12:16,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615066880] [2022-11-03 04:12:16,437 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:12:16,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 176 states [2022-11-03 04:12:16,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:12:16,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 176 interpolants. [2022-11-03 04:12:16,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=477, Invalid=30323, Unknown=0, NotChecked=0, Total=30800 [2022-11-03 04:12:16,441 INFO L87 Difference]: Start difference. First operand 17628 states and 22949 transitions. Second operand has 176 states, 176 states have (on average 6.448863636363637) internal successors, (1135), 176 states have internal predecessors, (1135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)