./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.sw_state_machine.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/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_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.sw_state_machine.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/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_95882af2-7094-4b23-a926-ecf72ae0715a/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 1077ae0441cb571883fc0ff708e55c30eb3995f278f5fee5452eacbd87485486 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 02:01:00,987 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:01:00,990 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:01:01,023 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:01:01,024 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:01:01,025 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:01:01,027 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:01:01,029 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:01:01,031 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:01:01,033 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:01:01,034 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:01:01,036 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:01:01,036 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:01:01,038 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:01:01,040 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:01:01,041 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:01:01,043 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:01:01,044 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:01:01,046 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:01:01,049 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:01:01,051 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:01:01,053 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:01:01,054 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:01:01,055 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:01:01,060 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:01:01,060 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:01:01,061 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:01:01,062 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:01:01,063 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:01:01,064 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:01:01,064 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:01:01,065 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:01:01,066 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:01:01,068 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:01:01,069 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:01:01,070 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:01:01,071 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:01:01,071 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:01:01,072 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:01:01,073 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:01:01,074 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:01:01,080 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 02:01:01,131 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:01:01,131 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:01:01,132 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:01:01,132 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:01:01,133 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:01:01,133 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:01:01,133 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:01:01,134 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:01:01,134 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:01:01,134 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:01:01,135 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:01:01,136 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:01:01,136 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:01:01,136 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:01:01,137 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:01:01,137 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:01:01,137 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:01:01,137 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:01:01,138 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:01:01,138 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:01:01,139 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:01:01,139 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:01:01,139 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:01:01,141 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:01:01,141 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:01:01,141 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:01:01,142 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:01:01,142 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:01:01,142 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:01:01,142 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:01:01,143 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:01:01,143 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:01:01,143 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:01:01,144 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:01:01,144 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:01:01,144 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:01:01,144 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:01:01,145 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:01:01,145 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_95882af2-7094-4b23-a926-ecf72ae0715a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1077ae0441cb571883fc0ff708e55c30eb3995f278f5fee5452eacbd87485486 [2022-11-03 02:01:01,491 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:01:01,526 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:01:01,531 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:01:01,532 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:01:01,533 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:01:01,534 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.sw_state_machine.c [2022-11-03 02:01:01,619 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/data/bdd24b525/d77db2089623443ca4ff0dd5d869f670/FLAG6413e317e [2022-11-03 02:01:02,278 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:01:02,284 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.sw_state_machine.c [2022-11-03 02:01:02,300 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/data/bdd24b525/d77db2089623443ca4ff0dd5d869f670/FLAG6413e317e [2022-11-03 02:01:02,518 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/data/bdd24b525/d77db2089623443ca4ff0dd5d869f670 [2022-11-03 02:01:02,521 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:01:02,522 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:01:02,524 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:01:02,524 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:01:02,528 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:01:02,529 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:01:02" (1/1) ... [2022-11-03 02:01:02,531 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@577aa55c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:01:02, skipping insertion in model container [2022-11-03 02:01:02,531 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:01:02" (1/1) ... [2022-11-03 02:01:02,540 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:01:02,597 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:01:02,860 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_95882af2-7094-4b23-a926-ecf72ae0715a/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.sw_state_machine.c[1107,1120] [2022-11-03 02:01:03,114 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:01:03,118 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:01:03,131 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_95882af2-7094-4b23-a926-ecf72ae0715a/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.sw_state_machine.c[1107,1120] [2022-11-03 02:01:03,293 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:01:03,309 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:01:03,310 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:01:03 WrapperNode [2022-11-03 02:01:03,310 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:01:03,312 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:01:03,312 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:01:03,312 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:01:03,320 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:01:03" (1/1) ... [2022-11-03 02:01:03,368 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:01:03" (1/1) ... [2022-11-03 02:01:03,505 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 751 [2022-11-03 02:01:03,506 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:01:03,507 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:01:03,507 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:01:03,507 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:01:03,517 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:01:03" (1/1) ... [2022-11-03 02:01:03,517 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:01:03" (1/1) ... [2022-11-03 02:01:03,529 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:01:03" (1/1) ... [2022-11-03 02:01:03,530 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:01:03" (1/1) ... [2022-11-03 02:01:03,568 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:01:03" (1/1) ... [2022-11-03 02:01:03,574 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:01:03" (1/1) ... [2022-11-03 02:01:03,581 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:01:03" (1/1) ... [2022-11-03 02:01:03,587 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:01:03" (1/1) ... [2022-11-03 02:01:03,600 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:01:03,601 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:01:03,601 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:01:03,601 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:01:03,603 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:01:03" (1/1) ... [2022-11-03 02:01:03,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:01:03,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:01:03,639 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:01:03,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:01:03,716 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:01:03,718 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:01:03,998 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:01:04,002 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:01:11,820 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:01:12,989 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:01:12,989 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 02:01:12,992 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:01:12 BoogieIcfgContainer [2022-11-03 02:01:12,992 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:01:12,995 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:01:12,995 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:01:12,999 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:01:12,999 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:01:02" (1/3) ... [2022-11-03 02:01:13,000 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7643266 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:01:13, skipping insertion in model container [2022-11-03 02:01:13,000 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:01:03" (2/3) ... [2022-11-03 02:01:13,001 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7643266 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:01:13, skipping insertion in model container [2022-11-03 02:01:13,001 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:01:12" (3/3) ... [2022-11-03 02:01:13,003 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.sw_state_machine.c [2022-11-03 02:01:13,023 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:01:13,024 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:01:13,078 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:01:13,085 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;@7b2230b6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:01:13,086 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:01:13,091 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:13,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-03 02:01:13,097 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:01:13,098 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-03 02:01:13,099 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:01:13,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:01:13,105 INFO L85 PathProgramCache]: Analyzing trace with hash 5372408, now seen corresponding path program 1 times [2022-11-03 02:01:13,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:01:13,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010989803] [2022-11-03 02:01:13,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:01:13,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:01:13,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 02:01:13,353 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-03 02:01:13,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 02:01:13,450 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-03 02:01:13,452 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-03 02:01:13,453 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-03 02:01:13,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:01:13,461 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-03 02:01:13,466 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-03 02:01:13,486 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2022-11-03 02:01:13,497 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 02:01:13 BoogieIcfgContainer [2022-11-03 02:01:13,498 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-03 02:01:13,501 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-03 02:01:13,501 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-03 02:01:13,501 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-03 02:01:13,503 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:01:12" (3/4) ... [2022-11-03 02:01:13,507 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-03 02:01:13,507 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-03 02:01:13,511 INFO L158 Benchmark]: Toolchain (without parser) took 10987.21ms. Allocated memory was 88.1MB in the beginning and 444.6MB in the end (delta: 356.5MB). Free memory was 51.0MB in the beginning and 194.0MB in the end (delta: -143.0MB). Peak memory consumption was 212.8MB. Max. memory is 16.1GB. [2022-11-03 02:01:13,511 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 88.1MB. Free memory was 68.2MB in the beginning and 68.1MB in the end (delta: 51.9kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 02:01:13,513 INFO L158 Benchmark]: CACSL2BoogieTranslator took 786.32ms. Allocated memory was 88.1MB in the beginning and 127.9MB in the end (delta: 39.8MB). Free memory was 50.8MB in the beginning and 87.0MB in the end (delta: -36.2MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-11-03 02:01:13,515 INFO L158 Benchmark]: Boogie Procedure Inliner took 194.12ms. Allocated memory is still 127.9MB. Free memory was 87.0MB in the beginning and 73.5MB in the end (delta: 13.5MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-11-03 02:01:13,521 INFO L158 Benchmark]: Boogie Preprocessor took 93.85ms. Allocated memory is still 127.9MB. Free memory was 73.5MB in the beginning and 66.8MB in the end (delta: 6.7MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-11-03 02:01:13,522 INFO L158 Benchmark]: RCFGBuilder took 9391.43ms. Allocated memory was 127.9MB in the beginning and 444.6MB in the end (delta: 316.7MB). Free memory was 66.8MB in the beginning and 219.2MB in the end (delta: -152.4MB). Peak memory consumption was 200.2MB. Max. memory is 16.1GB. [2022-11-03 02:01:13,524 INFO L158 Benchmark]: TraceAbstraction took 503.27ms. Allocated memory is still 444.6MB. Free memory was 218.1MB in the beginning and 194.0MB in the end (delta: 24.1MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2022-11-03 02:01:13,525 INFO L158 Benchmark]: Witness Printer took 7.62ms. Allocated memory is still 444.6MB. Free memory is still 194.0MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:01:13,534 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 88.1MB. Free memory was 68.2MB in the beginning and 68.1MB in the end (delta: 51.9kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 786.32ms. Allocated memory was 88.1MB in the beginning and 127.9MB in the end (delta: 39.8MB). Free memory was 50.8MB in the beginning and 87.0MB in the end (delta: -36.2MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 194.12ms. Allocated memory is still 127.9MB. Free memory was 87.0MB in the beginning and 73.5MB in the end (delta: 13.5MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Preprocessor took 93.85ms. Allocated memory is still 127.9MB. Free memory was 73.5MB in the beginning and 66.8MB in the end (delta: 6.7MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * RCFGBuilder took 9391.43ms. Allocated memory was 127.9MB in the beginning and 444.6MB in the end (delta: 316.7MB). Free memory was 66.8MB in the beginning and 219.2MB in the end (delta: -152.4MB). Peak memory consumption was 200.2MB. Max. memory is 16.1GB. * TraceAbstraction took 503.27ms. Allocated memory is still 444.6MB. Free memory was 218.1MB in the beginning and 194.0MB in the end (delta: 24.1MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * Witness Printer took 7.62ms. Allocated memory is still 444.6MB. Free memory is still 194.0MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 20]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseComplement at line 84, overapproximation of bitwiseAnd at line 89. 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_32 mask_SORT_32 = (SORT_32)-1 >> (sizeof(SORT_32) * 8 - 32); [L29] const SORT_32 msb_SORT_32 = (SORT_32)1 << (32 - 1); [L31] const SORT_1 var_4 = 0; [L32] const SORT_1 var_10 = 1; [L33] const SORT_32 var_33 = 0; [L34] const SORT_32 var_39 = 2; [L35] const SORT_32 var_51 = 1; [L37] SORT_1 input_2; [L38] SORT_1 input_3; [L40] SORT_1 state_5 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L41] SORT_1 state_14 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L42] SORT_1 state_16 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L43] SORT_1 state_18 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L44] SORT_1 state_20 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L45] SORT_1 state_22 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L46] SORT_1 state_24 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L47] SORT_1 state_26 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L48] SORT_1 state_28 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L49] SORT_1 state_30 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L50] SORT_32 state_34 = __VERIFIER_nondet_uint() & mask_SORT_32; [L51] SORT_1 state_36 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L53] SORT_1 init_6_arg_1 = var_4; [L54] state_5 = init_6_arg_1 [L55] SORT_1 init_15_arg_1 = var_10; [L56] state_14 = init_15_arg_1 [L57] SORT_1 init_17_arg_1 = var_4; [L58] state_16 = init_17_arg_1 [L59] SORT_1 init_19_arg_1 = var_4; [L60] state_18 = init_19_arg_1 [L61] SORT_1 init_21_arg_1 = var_4; [L62] state_20 = init_21_arg_1 [L63] SORT_1 init_23_arg_1 = var_4; [L64] state_22 = init_23_arg_1 [L65] SORT_1 init_25_arg_1 = var_4; [L66] state_24 = init_25_arg_1 [L67] SORT_1 init_27_arg_1 = var_4; [L68] state_26 = init_27_arg_1 [L69] SORT_1 init_29_arg_1 = var_4; [L70] state_28 = init_29_arg_1 [L71] SORT_1 init_31_arg_1 = var_10; [L72] state_30 = init_31_arg_1 [L73] SORT_32 init_35_arg_1 = var_33; [L74] state_34 = init_35_arg_1 [L75] SORT_1 init_37_arg_1 = var_4; [L76] state_36 = init_37_arg_1 VAL [init_15_arg_1=1, init_17_arg_1=0, init_19_arg_1=0, init_21_arg_1=0, init_23_arg_1=0, init_25_arg_1=0, init_27_arg_1=0, init_29_arg_1=0, init_31_arg_1=1, init_35_arg_1=0, init_37_arg_1=0, init_6_arg_1=0, mask_SORT_1=1, mask_SORT_32=4294967295, msb_SORT_1=1, msb_SORT_32=2147483648, state_14=1, state_16=0, state_18=0, state_20=0, state_22=0, state_24=0, state_26=0, state_28=0, state_30=1, state_34=0, state_36=0, state_5=0, var_10=1, var_33=0, var_39=2, var_4=0, var_51=1] [L79] input_2 = __VERIFIER_nondet_uchar() [L80] input_3 = __VERIFIER_nondet_uchar() [L83] SORT_1 var_7_arg_0 = state_5; [L84] SORT_1 var_7 = ~var_7_arg_0; [L85] SORT_1 var_11_arg_0 = var_7; [L86] SORT_1 var_11 = ~var_11_arg_0; [L87] SORT_1 var_12_arg_0 = var_10; [L88] SORT_1 var_12_arg_1 = var_11; [L89] SORT_1 var_12 = var_12_arg_0 & var_12_arg_1; [L90] var_12 = var_12 & mask_SORT_1 [L91] SORT_1 bad_13_arg_0 = var_12; [L92] CALL __VERIFIER_assert(!(bad_13_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: 0.4s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=7occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 4 NumberOfCodeBlocks, 4 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-11-03 02:01:13,604 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/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_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.sw_state_machine.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/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_95882af2-7094-4b23-a926-ecf72ae0715a/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 1077ae0441cb571883fc0ff708e55c30eb3995f278f5fee5452eacbd87485486 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 02:01:16,229 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:01:16,231 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:01:16,267 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:01:16,268 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:01:16,271 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:01:16,274 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:01:16,278 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:01:16,283 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:01:16,294 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:01:16,295 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:01:16,296 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:01:16,297 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:01:16,299 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:01:16,301 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:01:16,304 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:01:16,305 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:01:16,307 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:01:16,309 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:01:16,313 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:01:16,321 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:01:16,324 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:01:16,325 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:01:16,327 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:01:16,332 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:01:16,338 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:01:16,339 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:01:16,340 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:01:16,342 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:01:16,343 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:01:16,345 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:01:16,346 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:01:16,347 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:01:16,349 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:01:16,351 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:01:16,351 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:01:16,352 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:01:16,365 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:01:16,366 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:01:16,368 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:01:16,369 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:01:16,370 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2022-11-03 02:01:16,414 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:01:16,414 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:01:16,416 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:01:16,416 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:01:16,417 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:01:16,417 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:01:16,417 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:01:16,418 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:01:16,418 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:01:16,418 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:01:16,419 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:01:16,419 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:01:16,421 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:01:16,421 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:01:16,422 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:01:16,422 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:01:16,422 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:01:16,422 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 02:01:16,422 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 02:01:16,423 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 02:01:16,423 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:01:16,423 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:01:16,423 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:01:16,424 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:01:16,424 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 02:01:16,424 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:01:16,424 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:01:16,425 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:01:16,425 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:01:16,425 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:01:16,425 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 02:01:16,426 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 02:01:16,426 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:01:16,426 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:01:16,427 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 02:01:16,427 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_95882af2-7094-4b23-a926-ecf72ae0715a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1077ae0441cb571883fc0ff708e55c30eb3995f278f5fee5452eacbd87485486 [2022-11-03 02:01:16,865 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:01:16,891 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:01:16,894 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:01:16,896 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:01:16,897 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:01:16,899 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.sw_state_machine.c [2022-11-03 02:01:16,997 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/data/38e3c18d2/0919fdd9fb334287a3a6017a969ee092/FLAG17ee30350 [2022-11-03 02:01:17,682 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:01:17,683 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.sw_state_machine.c [2022-11-03 02:01:17,696 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/data/38e3c18d2/0919fdd9fb334287a3a6017a969ee092/FLAG17ee30350 [2022-11-03 02:01:17,959 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/data/38e3c18d2/0919fdd9fb334287a3a6017a969ee092 [2022-11-03 02:01:17,962 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:01:17,963 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:01:17,965 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:01:17,965 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:01:17,981 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:01:17,982 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:01:17" (1/1) ... [2022-11-03 02:01:17,984 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@514d306b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:01:17, skipping insertion in model container [2022-11-03 02:01:17,986 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:01:17" (1/1) ... [2022-11-03 02:01:17,995 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:01:18,042 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:01:18,255 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_95882af2-7094-4b23-a926-ecf72ae0715a/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.sw_state_machine.c[1107,1120] [2022-11-03 02:01:18,528 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:01:18,544 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:01:18,559 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_95882af2-7094-4b23-a926-ecf72ae0715a/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.sw_state_machine.c[1107,1120] [2022-11-03 02:01:18,677 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:01:18,693 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:01:18,694 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:01:18 WrapperNode [2022-11-03 02:01:18,694 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:01:18,695 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:01:18,696 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:01:18,696 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:01:18,705 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:01:18" (1/1) ... [2022-11-03 02:01:18,731 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:01:18" (1/1) ... [2022-11-03 02:01:18,778 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 751 [2022-11-03 02:01:18,779 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:01:18,779 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:01:18,780 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:01:18,780 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:01:18,791 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:01:18" (1/1) ... [2022-11-03 02:01:18,791 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:01:18" (1/1) ... [2022-11-03 02:01:18,812 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:01:18" (1/1) ... [2022-11-03 02:01:18,812 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:01:18" (1/1) ... [2022-11-03 02:01:18,833 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:01:18" (1/1) ... [2022-11-03 02:01:18,858 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:01:18" (1/1) ... [2022-11-03 02:01:18,862 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:01:18" (1/1) ... [2022-11-03 02:01:18,896 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:01:18" (1/1) ... [2022-11-03 02:01:18,903 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:01:18,904 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:01:18,904 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:01:18,904 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:01:18,905 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:01:18" (1/1) ... [2022-11-03 02:01:18,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:01:18,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:01:18,968 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:01:18,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:01:19,026 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:01:19,027 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:01:19,357 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:01:19,360 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:01:20,432 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:01:20,440 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:01:20,448 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 02:01:20,451 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:01:20 BoogieIcfgContainer [2022-11-03 02:01:20,451 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:01:20,454 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:01:20,455 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:01:20,459 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:01:20,460 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:01:17" (1/3) ... [2022-11-03 02:01:20,461 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6298ac03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:01:20, skipping insertion in model container [2022-11-03 02:01:20,461 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:01:18" (2/3) ... [2022-11-03 02:01:20,462 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6298ac03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:01:20, skipping insertion in model container [2022-11-03 02:01:20,462 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:01:20" (3/3) ... [2022-11-03 02:01:20,464 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.sw_state_machine.c [2022-11-03 02:01:20,486 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:01:20,486 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:01:20,571 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:01:20,584 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;@3c9449be, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:01:20,585 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:01:20,590 INFO L276 IsEmpty]: Start isEmpty. Operand has 45 states, 43 states have (on average 1.4883720930232558) internal successors, (64), 44 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:20,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-03 02:01:20,598 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:01:20,599 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-03 02:01:20,600 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:01:20,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:01:20,608 INFO L85 PathProgramCache]: Analyzing trace with hash 28698761, now seen corresponding path program 1 times [2022-11-03 02:01:20,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:01:20,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2031922127] [2022-11-03 02:01:20,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:01:20,625 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:01:20,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:01:20,631 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:01:20,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 02:01:20,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:20,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:01:20,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:01:20,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:01:20,998 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:01:20,999 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:01:21,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2031922127] [2022-11-03 02:01:21,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2031922127] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:01:21,001 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:01:21,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:01:21,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568593102] [2022-11-03 02:01:21,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:01:21,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:01:21,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:01:21,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:01:21,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:01:21,055 INFO L87 Difference]: Start difference. First operand has 45 states, 43 states have (on average 1.4883720930232558) internal successors, (64), 44 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:21,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:01:21,272 INFO L93 Difference]: Finished difference Result 122 states and 183 transitions. [2022-11-03 02:01:21,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:01:21,277 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-03 02:01:21,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:01:21,292 INFO L225 Difference]: With dead ends: 122 [2022-11-03 02:01:21,292 INFO L226 Difference]: Without dead ends: 79 [2022-11-03 02:01:21,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:01:21,302 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 106 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:01:21,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 155 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:01:21,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-11-03 02:01:21,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 43. [2022-11-03 02:01:21,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.4285714285714286) internal successors, (60), 42 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:21,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 60 transitions. [2022-11-03 02:01:21,361 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 60 transitions. Word has length 5 [2022-11-03 02:01:21,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:01:21,361 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 60 transitions. [2022-11-03 02:01:21,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:21,362 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 60 transitions. [2022-11-03 02:01:21,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-03 02:01:21,364 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:01:21,365 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] [2022-11-03 02:01:21,389 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:01:21,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:01:21,590 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:01:21,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:01:21,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1917412477, now seen corresponding path program 1 times [2022-11-03 02:01:21,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:01:21,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1050266006] [2022-11-03 02:01:21,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:01:21,597 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:01:21,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:01:21,599 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:01:21,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 02:01:22,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:22,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 687 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:01:22,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:01:22,154 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:01:22,156 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:01:22,157 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:01:22,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1050266006] [2022-11-03 02:01:22,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1050266006] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:01:22,158 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:01:22,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:01:22,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570036859] [2022-11-03 02:01:22,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:01:22,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:01:22,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:01:22,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:01:22,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:01:22,167 INFO L87 Difference]: Start difference. First operand 43 states and 60 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:22,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:01:22,328 INFO L93 Difference]: Finished difference Result 124 states and 176 transitions. [2022-11-03 02:01:22,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:01:22,329 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-11-03 02:01:22,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:01:22,331 INFO L225 Difference]: With dead ends: 124 [2022-11-03 02:01:22,333 INFO L226 Difference]: Without dead ends: 85 [2022-11-03 02:01:22,335 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:01:22,337 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 102 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:01:22,338 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 150 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:01:22,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-11-03 02:01:22,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 47. [2022-11-03 02:01:22,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.4130434782608696) internal successors, (65), 46 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:22,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 65 transitions. [2022-11-03 02:01:22,355 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 65 transitions. Word has length 42 [2022-11-03 02:01:22,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:01:22,356 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 65 transitions. [2022-11-03 02:01:22,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:22,362 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 65 transitions. [2022-11-03 02:01:22,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-03 02:01:22,364 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:01:22,364 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] [2022-11-03 02:01:22,382 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-11-03 02:01:22,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:01:22,582 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:01:22,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:01:22,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1073406975, now seen corresponding path program 1 times [2022-11-03 02:01:22,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:01:22,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [750179288] [2022-11-03 02:01:22,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:01:22,585 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:01:22,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:01:22,587 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:01:22,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 02:01:23,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:23,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 687 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:01:23,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:01:23,108 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:01:23,108 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:01:23,108 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:01:23,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [750179288] [2022-11-03 02:01:23,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [750179288] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:01:23,109 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:01:23,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:01:23,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884139965] [2022-11-03 02:01:23,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:01:23,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:01:23,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:01:23,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:01:23,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:01:23,113 INFO L87 Difference]: Start difference. First operand 47 states and 65 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:23,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:01:23,222 INFO L93 Difference]: Finished difference Result 138 states and 196 transitions. [2022-11-03 02:01:23,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:01:23,223 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-11-03 02:01:23,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:01:23,224 INFO L225 Difference]: With dead ends: 138 [2022-11-03 02:01:23,225 INFO L226 Difference]: Without dead ends: 99 [2022-11-03 02:01:23,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:01:23,227 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 87 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:01:23,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 163 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:01:23,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-11-03 02:01:23,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 61. [2022-11-03 02:01:23,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.4166666666666667) internal successors, (85), 60 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:23,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 85 transitions. [2022-11-03 02:01:23,235 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 85 transitions. Word has length 42 [2022-11-03 02:01:23,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:01:23,236 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 85 transitions. [2022-11-03 02:01:23,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:23,237 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 85 transitions. [2022-11-03 02:01:23,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-03 02:01:23,238 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:01:23,238 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] [2022-11-03 02:01:23,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:01:23,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:01:23,460 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:01:23,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:01:23,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1496108801, now seen corresponding path program 1 times [2022-11-03 02:01:23,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:01:23,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1963852022] [2022-11-03 02:01:23,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:01:23,463 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:01:23,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:01:23,465 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:01:23,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-03 02:01:23,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:23,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 687 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:01:23,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:01:24,080 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:01:24,080 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:01:24,080 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:01:24,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1963852022] [2022-11-03 02:01:24,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1963852022] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:01:24,081 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:01:24,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:01:24,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619757779] [2022-11-03 02:01:24,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:01:24,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:01:24,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:01:24,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:01:24,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:01:24,083 INFO L87 Difference]: Start difference. First operand 61 states and 85 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:24,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:01:24,270 INFO L93 Difference]: Finished difference Result 155 states and 220 transitions. [2022-11-03 02:01:24,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:01:24,271 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-11-03 02:01:24,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:01:24,272 INFO L225 Difference]: With dead ends: 155 [2022-11-03 02:01:24,272 INFO L226 Difference]: Without dead ends: 116 [2022-11-03 02:01:24,272 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:01:24,273 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 106 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:01:24,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 178 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:01:24,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-11-03 02:01:24,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 63. [2022-11-03 02:01:24,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.403225806451613) internal successors, (87), 62 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:24,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 87 transitions. [2022-11-03 02:01:24,281 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 87 transitions. Word has length 42 [2022-11-03 02:01:24,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:01:24,281 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 87 transitions. [2022-11-03 02:01:24,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:24,282 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 87 transitions. [2022-11-03 02:01:24,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-03 02:01:24,283 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:01:24,283 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] [2022-11-03 02:01:24,308 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:01:24,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:01:24,509 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:01:24,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:01:24,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1109914753, now seen corresponding path program 1 times [2022-11-03 02:01:24,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:01:24,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1524971753] [2022-11-03 02:01:24,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:01:24,511 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:01:24,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:01:24,512 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:01:24,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-03 02:01:24,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:24,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 687 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:01:24,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:01:25,173 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:01:25,174 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:01:25,174 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:01:25,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1524971753] [2022-11-03 02:01:25,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1524971753] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:01:25,174 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:01:25,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:01:25,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049575392] [2022-11-03 02:01:25,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:01:25,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:01:25,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:01:25,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:01:25,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:01:25,177 INFO L87 Difference]: Start difference. First operand 63 states and 87 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:25,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:01:25,372 INFO L93 Difference]: Finished difference Result 155 states and 219 transitions. [2022-11-03 02:01:25,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:01:25,373 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-11-03 02:01:25,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:01:25,374 INFO L225 Difference]: With dead ends: 155 [2022-11-03 02:01:25,374 INFO L226 Difference]: Without dead ends: 116 [2022-11-03 02:01:25,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:01:25,375 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 100 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:01:25,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 174 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:01:25,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-11-03 02:01:25,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 65. [2022-11-03 02:01:25,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.390625) internal successors, (89), 64 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:25,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 89 transitions. [2022-11-03 02:01:25,382 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 89 transitions. Word has length 42 [2022-11-03 02:01:25,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:01:25,383 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 89 transitions. [2022-11-03 02:01:25,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:25,383 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 89 transitions. [2022-11-03 02:01:25,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-03 02:01:25,384 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:01:25,384 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] [2022-11-03 02:01:25,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:01:25,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:01:25,600 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:01:25,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:01:25,600 INFO L85 PathProgramCache]: Analyzing trace with hash -478433149, now seen corresponding path program 1 times [2022-11-03 02:01:25,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:01:25,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1205829989] [2022-11-03 02:01:25,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:01:25,602 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:01:25,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:01:25,603 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:01:25,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-03 02:01:25,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:26,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 687 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:01:26,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:01:26,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:01:26,073 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:01:26,073 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:01:26,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1205829989] [2022-11-03 02:01:26,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1205829989] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:01:26,074 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:01:26,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:01:26,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868058875] [2022-11-03 02:01:26,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:01:26,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:01:26,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:01:26,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:01:26,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:01:26,076 INFO L87 Difference]: Start difference. First operand 65 states and 89 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:26,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:01:26,201 INFO L93 Difference]: Finished difference Result 155 states and 218 transitions. [2022-11-03 02:01:26,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:01:26,202 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-11-03 02:01:26,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:01:26,202 INFO L225 Difference]: With dead ends: 155 [2022-11-03 02:01:26,202 INFO L226 Difference]: Without dead ends: 116 [2022-11-03 02:01:26,203 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:01:26,204 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 94 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 200 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 02:01:26,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 200 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:01:26,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-11-03 02:01:26,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 67. [2022-11-03 02:01:26,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.378787878787879) internal successors, (91), 66 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:26,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 91 transitions. [2022-11-03 02:01:26,209 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 91 transitions. Word has length 42 [2022-11-03 02:01:26,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:01:26,210 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 91 transitions. [2022-11-03 02:01:26,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:26,211 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 91 transitions. [2022-11-03 02:01:26,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-03 02:01:26,212 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:01:26,212 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] [2022-11-03 02:01:26,233 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-03 02:01:26,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:01:26,428 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:01:26,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:01:26,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1758296827, now seen corresponding path program 1 times [2022-11-03 02:01:26,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:01:26,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1002640957] [2022-11-03 02:01:26,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:01:26,430 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:01:26,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:01:26,431 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:01:26,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-03 02:01:26,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:26,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 687 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:01:26,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:01:26,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:01:26,899 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:01:26,899 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:01:26,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1002640957] [2022-11-03 02:01:26,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1002640957] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:01:26,900 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:01:26,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:01:26,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279066110] [2022-11-03 02:01:26,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:01:26,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:01:26,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:01:26,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:01:26,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:01:26,902 INFO L87 Difference]: Start difference. First operand 67 states and 91 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:27,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:01:27,033 INFO L93 Difference]: Finished difference Result 155 states and 217 transitions. [2022-11-03 02:01:27,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:01:27,034 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-11-03 02:01:27,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:01:27,035 INFO L225 Difference]: With dead ends: 155 [2022-11-03 02:01:27,035 INFO L226 Difference]: Without dead ends: 116 [2022-11-03 02:01:27,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:01:27,036 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 88 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 199 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 02:01:27,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 199 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:01:27,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-11-03 02:01:27,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 69. [2022-11-03 02:01:27,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.3676470588235294) internal successors, (93), 68 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:27,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 93 transitions. [2022-11-03 02:01:27,041 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 93 transitions. Word has length 42 [2022-11-03 02:01:27,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:01:27,042 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 93 transitions. [2022-11-03 02:01:27,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:27,042 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 93 transitions. [2022-11-03 02:01:27,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-03 02:01:27,043 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:01:27,043 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] [2022-11-03 02:01:27,065 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-03 02:01:27,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:01:27,244 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:01:27,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:01:27,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1949864455, now seen corresponding path program 1 times [2022-11-03 02:01:27,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:01:27,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [696255542] [2022-11-03 02:01:27,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:01:27,245 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:01:27,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:01:27,246 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:01:27,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-03 02:01:27,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:27,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 687 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:01:27,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:01:27,711 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:01:27,711 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:01:27,712 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:01:27,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [696255542] [2022-11-03 02:01:27,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [696255542] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:01:27,712 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:01:27,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:01:27,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6768708] [2022-11-03 02:01:27,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:01:27,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:01:27,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:01:27,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:01:27,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:01:27,714 INFO L87 Difference]: Start difference. First operand 69 states and 93 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:27,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:01:27,839 INFO L93 Difference]: Finished difference Result 155 states and 216 transitions. [2022-11-03 02:01:27,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:01:27,839 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-11-03 02:01:27,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:01:27,840 INFO L225 Difference]: With dead ends: 155 [2022-11-03 02:01:27,840 INFO L226 Difference]: Without dead ends: 116 [2022-11-03 02:01:27,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:01:27,841 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 72 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 198 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 02:01:27,842 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 198 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:01:27,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-11-03 02:01:27,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 75. [2022-11-03 02:01:27,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.364864864864865) internal successors, (101), 74 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:27,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 101 transitions. [2022-11-03 02:01:27,847 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 101 transitions. Word has length 42 [2022-11-03 02:01:27,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:01:27,848 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 101 transitions. [2022-11-03 02:01:27,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:27,848 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 101 transitions. [2022-11-03 02:01:27,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-03 02:01:27,849 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:01:27,849 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] [2022-11-03 02:01:27,865 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-03 02:01:28,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:01:28,065 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:01:28,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:01:28,065 INFO L85 PathProgramCache]: Analyzing trace with hash -570095479, now seen corresponding path program 1 times [2022-11-03 02:01:28,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:01:28,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [530822455] [2022-11-03 02:01:28,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:01:28,066 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:01:28,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:01:28,067 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:01:28,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-03 02:01:28,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:28,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 687 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-03 02:01:28,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:01:28,696 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 02:01:28,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:01:29,172 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 02:01:29,172 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:01:29,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [530822455] [2022-11-03 02:01:29,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [530822455] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:01:29,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1536233894] [2022-11-03 02:01:29,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:01:29,174 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:01:29,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:01:29,178 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:01:29,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2022-11-03 02:01:29,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:29,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 687 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-03 02:01:29,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:01:30,220 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 02:01:30,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:01:30,503 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 02:01:30,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1536233894] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:01:30,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975430559] [2022-11-03 02:01:30,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:01:30,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:01:30,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:01:30,510 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:01:30,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-03 02:01:30,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:30,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 687 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-03 02:01:30,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:01:31,209 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 02:01:31,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:01:31,515 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 02:01:31,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975430559] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:01:31,516 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:01:31,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9, 8, 10, 9] total 20 [2022-11-03 02:01:31,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667373815] [2022-11-03 02:01:31,517 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:01:31,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-03 02:01:31,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:01:31,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-03 02:01:31,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-11-03 02:01:31,519 INFO L87 Difference]: Start difference. First operand 75 states and 101 transitions. Second operand has 20 states, 20 states have (on average 4.7) internal successors, (94), 20 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:32,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:01:32,139 INFO L93 Difference]: Finished difference Result 151 states and 204 transitions. [2022-11-03 02:01:32,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 02:01:32,140 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.7) internal successors, (94), 20 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-11-03 02:01:32,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:01:32,144 INFO L225 Difference]: With dead ends: 151 [2022-11-03 02:01:32,144 INFO L226 Difference]: Without dead ends: 149 [2022-11-03 02:01:32,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 224 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=145, Invalid=505, Unknown=0, NotChecked=0, Total=650 [2022-11-03 02:01:32,145 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 611 mSDsluCounter, 497 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 611 SdHoareTripleChecker+Valid, 540 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 142 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:01:32,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [611 Valid, 540 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 131 Invalid, 0 Unknown, 142 Unchecked, 0.4s Time] [2022-11-03 02:01:32,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-11-03 02:01:32,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 110. [2022-11-03 02:01:32,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.3302752293577982) internal successors, (145), 109 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:32,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 145 transitions. [2022-11-03 02:01:32,163 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 145 transitions. Word has length 42 [2022-11-03 02:01:32,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:01:32,163 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 145 transitions. [2022-11-03 02:01:32,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.7) internal successors, (94), 20 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:32,164 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 145 transitions. [2022-11-03 02:01:32,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-03 02:01:32,165 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:01:32,165 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] [2022-11-03 02:01:32,203 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-03 02:01:32,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-03 02:01:32,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2022-11-03 02:01:32,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:01:32,779 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:01:32,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:01:32,780 INFO L85 PathProgramCache]: Analyzing trace with hash 89436043, now seen corresponding path program 1 times [2022-11-03 02:01:32,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:01:32,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1896292794] [2022-11-03 02:01:32,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:01:32,780 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:01:32,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:01:32,781 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:01:32,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-03 02:01:33,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:33,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 687 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:01:33,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:01:33,167 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:01:33,167 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:01:33,167 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:01:33,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1896292794] [2022-11-03 02:01:33,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1896292794] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:01:33,168 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:01:33,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:01:33,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600339724] [2022-11-03 02:01:33,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:01:33,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:01:33,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:01:33,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:01:33,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:01:33,170 INFO L87 Difference]: Start difference. First operand 110 states and 145 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:33,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:01:33,275 INFO L93 Difference]: Finished difference Result 150 states and 202 transitions. [2022-11-03 02:01:33,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:01:33,276 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-11-03 02:01:33,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:01:33,277 INFO L225 Difference]: With dead ends: 150 [2022-11-03 02:01:33,277 INFO L226 Difference]: Without dead ends: 81 [2022-11-03 02:01:33,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:01:33,278 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 88 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:01:33,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 148 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:01:33,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-11-03 02:01:33,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2022-11-03 02:01:33,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.3417721518987342) internal successors, (106), 79 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:33,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 106 transitions. [2022-11-03 02:01:33,283 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 106 transitions. Word has length 42 [2022-11-03 02:01:33,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:01:33,283 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 106 transitions. [2022-11-03 02:01:33,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:33,284 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 106 transitions. [2022-11-03 02:01:33,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-03 02:01:33,285 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:01:33,285 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:01:33,307 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-03 02:01:33,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:01:33,499 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:01:33,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:01:33,499 INFO L85 PathProgramCache]: Analyzing trace with hash -631538813, now seen corresponding path program 1 times [2022-11-03 02:01:33,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:01:33,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1570301725] [2022-11-03 02:01:33,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:01:33,500 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:01:33,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:01:33,501 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:01:33,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-03 02:01:34,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:34,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 1324 conjuncts, 81 conjunts are in the unsatisfiable core [2022-11-03 02:01:34,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:01:35,160 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 35 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:01:35,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:01:35,675 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 35 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:01:35,675 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:01:35,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1570301725] [2022-11-03 02:01:35,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1570301725] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:01:35,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [421469250] [2022-11-03 02:01:35,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:01:35,676 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:01:35,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:01:35,679 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:01:35,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2022-11-03 02:01:36,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:36,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 1324 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:01:36,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:01:36,511 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:01:36,512 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:01:36,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [421469250] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:01:36,512 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:01:36,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6] total 11 [2022-11-03 02:01:36,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386243975] [2022-11-03 02:01:36,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:01:36,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:01:36,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:01:36,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:01:36,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:01:36,515 INFO L87 Difference]: Start difference. First operand 80 states and 106 transitions. Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:36,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:01:36,704 INFO L93 Difference]: Finished difference Result 191 states and 266 transitions. [2022-11-03 02:01:36,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:01:36,705 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2022-11-03 02:01:36,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:01:36,706 INFO L225 Difference]: With dead ends: 191 [2022-11-03 02:01:36,706 INFO L226 Difference]: Without dead ends: 152 [2022-11-03 02:01:36,707 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:01:36,708 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 250 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:01:36,708 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 175 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:01:36,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-11-03 02:01:36,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 82. [2022-11-03 02:01:36,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.3333333333333333) internal successors, (108), 81 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:36,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 108 transitions. [2022-11-03 02:01:36,714 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 108 transitions. Word has length 79 [2022-11-03 02:01:36,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:01:36,715 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 108 transitions. [2022-11-03 02:01:36,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:36,715 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 108 transitions. [2022-11-03 02:01:36,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-03 02:01:36,716 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:01:36,716 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:01:36,727 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (15)] Ended with exit code 0 [2022-11-03 02:01:36,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-03 02:01:37,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:01:37,122 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:01:37,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:01:37,123 INFO L85 PathProgramCache]: Analyzing trace with hash 212466689, now seen corresponding path program 1 times [2022-11-03 02:01:37,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:01:37,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [893001714] [2022-11-03 02:01:37,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:01:37,124 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:01:37,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:01:37,125 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:01:37,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-03 02:01:37,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:37,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 1324 conjuncts, 81 conjunts are in the unsatisfiable core [2022-11-03 02:01:37,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:01:38,675 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:01:38,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:01:39,205 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:01:39,206 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:01:39,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [893001714] [2022-11-03 02:01:39,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [893001714] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:01:39,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1824659729] [2022-11-03 02:01:39,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:01:39,207 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:01:39,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:01:39,208 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:01:39,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2022-11-03 02:01:39,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:39,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 1324 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:01:39,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:01:40,069 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:01:40,069 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:01:40,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1824659729] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:01:40,070 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:01:40,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6] total 11 [2022-11-03 02:01:40,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990596631] [2022-11-03 02:01:40,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:01:40,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:01:40,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:01:40,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:01:40,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:01:40,073 INFO L87 Difference]: Start difference. First operand 82 states and 108 transitions. Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:40,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:01:40,272 INFO L93 Difference]: Finished difference Result 207 states and 287 transitions. [2022-11-03 02:01:40,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:01:40,273 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2022-11-03 02:01:40,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:01:40,274 INFO L225 Difference]: With dead ends: 207 [2022-11-03 02:01:40,274 INFO L226 Difference]: Without dead ends: 166 [2022-11-03 02:01:40,275 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:01:40,275 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 254 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:01:40,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [254 Valid, 174 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:01:40,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-11-03 02:01:40,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 96. [2022-11-03 02:01:40,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.3473684210526315) internal successors, (128), 95 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:40,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 128 transitions. [2022-11-03 02:01:40,287 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 128 transitions. Word has length 79 [2022-11-03 02:01:40,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:01:40,287 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 128 transitions. [2022-11-03 02:01:40,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:40,288 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 128 transitions. [2022-11-03 02:01:40,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-03 02:01:40,297 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:01:40,297 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:01:40,313 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2022-11-03 02:01:40,517 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-03 02:01:40,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:01:40,703 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:01:40,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:01:40,704 INFO L85 PathProgramCache]: Analyzing trace with hash -210235137, now seen corresponding path program 1 times [2022-11-03 02:01:40,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:01:40,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [546717569] [2022-11-03 02:01:40,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:01:40,706 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:01:40,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:01:40,708 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:01:40,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-03 02:01:41,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:41,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 1324 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 02:01:41,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:01:41,533 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 02:01:41,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:01:41,858 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 02:01:41,858 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:01:41,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [546717569] [2022-11-03 02:01:41,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [546717569] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:01:41,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [289426216] [2022-11-03 02:01:41,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:01:41,859 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:01:41,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:01:41,860 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:01:41,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2022-11-03 02:01:42,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:42,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 1324 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 02:01:42,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:01:43,117 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 02:01:43,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:01:43,408 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 02:01:43,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [289426216] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:01:43,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223081049] [2022-11-03 02:01:43,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:01:43,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:01:43,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:01:43,411 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:01:43,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-03 02:01:43,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:43,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 1324 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 02:01:43,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:01:44,159 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 02:01:44,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:01:44,449 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 02:01:44,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223081049] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:01:44,450 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:01:44,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 13 [2022-11-03 02:01:44,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735400008] [2022-11-03 02:01:44,451 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:01:44,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-03 02:01:44,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:01:44,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-03 02:01:44,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:01:44,453 INFO L87 Difference]: Start difference. First operand 96 states and 128 transitions. Second operand has 13 states, 13 states have (on average 7.538461538461538) internal successors, (98), 13 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:45,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:01:45,063 INFO L93 Difference]: Finished difference Result 395 states and 550 transitions. [2022-11-03 02:01:45,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-03 02:01:45,072 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 7.538461538461538) internal successors, (98), 13 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2022-11-03 02:01:45,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:01:45,079 INFO L225 Difference]: With dead ends: 395 [2022-11-03 02:01:45,080 INFO L226 Difference]: Without dead ends: 340 [2022-11-03 02:01:45,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 478 GetRequests, 452 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=132, Invalid=374, Unknown=0, NotChecked=0, Total=506 [2022-11-03 02:01:45,083 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 475 mSDsluCounter, 749 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 475 SdHoareTripleChecker+Valid, 820 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 238 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:01:45,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [475 Valid, 820 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 144 Invalid, 0 Unknown, 238 Unchecked, 0.4s Time] [2022-11-03 02:01:45,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2022-11-03 02:01:45,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 152. [2022-11-03 02:01:45,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.3708609271523178) internal successors, (207), 151 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:45,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 207 transitions. [2022-11-03 02:01:45,099 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 207 transitions. Word has length 79 [2022-11-03 02:01:45,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:01:45,100 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 207 transitions. [2022-11-03 02:01:45,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.538461538461538) internal successors, (98), 13 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:45,100 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 207 transitions. [2022-11-03 02:01:45,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-03 02:01:45,102 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:01:45,102 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:01:45,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-03 02:01:45,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-03 02:01:45,526 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2022-11-03 02:01:45,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:01:45,720 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:01:45,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:01:45,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1899178879, now seen corresponding path program 1 times [2022-11-03 02:01:45,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:01:45,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [156507407] [2022-11-03 02:01:45,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:01:45,722 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:01:45,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:01:45,723 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:01:45,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-03 02:01:46,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:46,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 1324 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-03 02:01:46,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:01:46,843 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 02:01:46,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:01:47,814 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 17 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:01:47,814 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:01:47,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [156507407] [2022-11-03 02:01:47,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [156507407] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:01:47,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1979126375] [2022-11-03 02:01:47,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:01:47,815 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:01:47,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:01:47,816 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:01:47,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2022-11-03 02:01:48,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:48,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 1324 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 02:01:48,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:01:49,172 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:01:49,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:01:49,445 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:01:49,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1979126375] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:01:49,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898688786] [2022-11-03 02:01:49,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:01:49,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:01:49,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:01:49,447 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:01:49,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-03 02:01:49,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:49,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 1324 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 02:01:49,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:01:50,324 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:01:50,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:01:50,620 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:01:50,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898688786] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:01:50,620 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:01:50,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 8, 8, 8, 8] total 38 [2022-11-03 02:01:50,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187244600] [2022-11-03 02:01:50,621 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:01:50,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-03 02:01:50,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:01:50,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-03 02:01:50,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1317, Unknown=0, NotChecked=0, Total=1406 [2022-11-03 02:01:50,623 INFO L87 Difference]: Start difference. First operand 152 states and 207 transitions. Second operand has 38 states, 38 states have (on average 7.526315789473684) internal successors, (286), 38 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:01,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:02:01,274 INFO L93 Difference]: Finished difference Result 2227 states and 3125 transitions. [2022-11-03 02:02:01,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 156 states. [2022-11-03 02:02:01,275 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 7.526315789473684) internal successors, (286), 38 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2022-11-03 02:02:01,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:02:01,284 INFO L225 Difference]: With dead ends: 2227 [2022-11-03 02:02:01,284 INFO L226 Difference]: Without dead ends: 2119 [2022-11-03 02:02:01,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 630 GetRequests, 444 SyntacticMatches, 0 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12008 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=5049, Invalid=30107, Unknown=0, NotChecked=0, Total=35156 [2022-11-03 02:02:01,300 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 4465 mSDsluCounter, 2051 mSDsCounter, 0 mSdLazyCounter, 898 mSolverCounterSat, 467 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4465 SdHoareTripleChecker+Valid, 2121 SdHoareTripleChecker+Invalid, 2768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 467 IncrementalHoareTripleChecker+Valid, 898 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1403 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:02:01,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4465 Valid, 2121 Invalid, 2768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [467 Valid, 898 Invalid, 0 Unknown, 1403 Unchecked, 1.6s Time] [2022-11-03 02:02:01,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2119 states. [2022-11-03 02:02:01,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2119 to 898. [2022-11-03 02:02:01,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 898 states, 897 states have (on average 1.3678929765886287) internal successors, (1227), 897 states have internal predecessors, (1227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:01,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 1227 transitions. [2022-11-03 02:02:01,363 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 1227 transitions. Word has length 79 [2022-11-03 02:02:01,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:02:01,363 INFO L495 AbstractCegarLoop]: Abstraction has 898 states and 1227 transitions. [2022-11-03 02:02:01,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 7.526315789473684) internal successors, (286), 38 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:01,364 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 1227 transitions. [2022-11-03 02:02:01,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-03 02:02:01,366 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:02:01,366 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, 1, 1, 1, 1, 1, 1] [2022-11-03 02:02:01,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2022-11-03 02:02:01,598 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-03 02:02:01,789 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-03 02:02:01,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:02:01,975 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:02:01,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:02:01,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1302584199, now seen corresponding path program 1 times [2022-11-03 02:02:01,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:02:01,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [358602206] [2022-11-03 02:02:01,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:01,977 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:02:01,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:02:01,978 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:02:01,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-03 02:02:02,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:02,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 1324 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 02:02:02,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:02,660 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 13 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:02,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:02:02,867 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 13 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:02,868 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:02:02,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [358602206] [2022-11-03 02:02:02,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [358602206] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:02:02,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1370843434] [2022-11-03 02:02:02,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:02,868 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:02:02,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:02:02,871 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:02:02,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2022-11-03 02:02:03,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:03,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 1324 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 02:02:03,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:04,054 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 13 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:04,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:02:04,220 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 13 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:04,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1370843434] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:02:04,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761899254] [2022-11-03 02:02:04,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:04,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:02:04,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:02:04,223 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:02:04,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-03 02:02:04,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:04,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 1324 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 02:02:04,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:04,816 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 13 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:04,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:02:04,968 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 13 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:04,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761899254] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:02:04,969 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:02:04,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 11 [2022-11-03 02:02:04,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116714547] [2022-11-03 02:02:04,970 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:02:04,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-03 02:02:04,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:02:04,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-03 02:02:04,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:02:04,971 INFO L87 Difference]: Start difference. First operand 898 states and 1227 transitions. Second operand has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:05,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:02:05,570 INFO L93 Difference]: Finished difference Result 2084 states and 2863 transitions. [2022-11-03 02:02:05,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 02:02:05,571 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2022-11-03 02:02:05,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:02:05,578 INFO L225 Difference]: With dead ends: 2084 [2022-11-03 02:02:05,578 INFO L226 Difference]: Without dead ends: 1964 [2022-11-03 02:02:05,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 478 GetRequests, 457 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2022-11-03 02:02:05,582 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 468 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 468 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:02:05,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [468 Valid, 522 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 143 Invalid, 0 Unknown, 25 Unchecked, 0.4s Time] [2022-11-03 02:02:05,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1964 states. [2022-11-03 02:02:05,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1964 to 1706. [2022-11-03 02:02:05,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1706 states, 1705 states have (on average 1.3624633431085045) internal successors, (2323), 1705 states have internal predecessors, (2323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:05,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1706 states to 1706 states and 2323 transitions. [2022-11-03 02:02:05,676 INFO L78 Accepts]: Start accepts. Automaton has 1706 states and 2323 transitions. Word has length 79 [2022-11-03 02:02:05,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:02:05,678 INFO L495 AbstractCegarLoop]: Abstraction has 1706 states and 2323 transitions. [2022-11-03 02:02:05,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:05,678 INFO L276 IsEmpty]: Start isEmpty. Operand 1706 states and 2323 transitions. [2022-11-03 02:02:05,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-03 02:02:05,683 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:02:05,684 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, 1, 1, 1, 1] [2022-11-03 02:02:05,725 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-03 02:02:05,918 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-03 02:02:06,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2022-11-03 02:02:06,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:02:06,305 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:02:06,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:02:06,306 INFO L85 PathProgramCache]: Analyzing trace with hash 715778185, now seen corresponding path program 2 times [2022-11-03 02:02:06,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:02:06,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [753654152] [2022-11-03 02:02:06,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:02:06,307 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:02:06,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:02:06,308 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:02:06,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-03 02:02:06,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:02:06,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:02:06,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 1324 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-03 02:02:06,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:07,564 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:07,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:02:08,687 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:08,687 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:02:08,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [753654152] [2022-11-03 02:02:08,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [753654152] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:02:08,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [107409650] [2022-11-03 02:02:08,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:02:08,687 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:02:08,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:02:08,688 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:02:08,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2022-11-03 02:02:09,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:02:09,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:02:09,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 1324 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-03 02:02:09,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:10,171 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:10,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:02:10,753 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:10,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [107409650] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:02:10,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133447938] [2022-11-03 02:02:10,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:02:10,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:02:10,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:02:10,754 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:02:10,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-03 02:02:11,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:02:11,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:02:11,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 1324 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-03 02:02:11,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:11,723 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:11,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:02:12,336 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:12,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133447938] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:02:12,337 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:02:12,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16, 16, 16, 16] total 30 [2022-11-03 02:02:12,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816130254] [2022-11-03 02:02:12,337 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:02:12,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-03 02:02:12,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:02:12,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-03 02:02:12,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2022-11-03 02:02:12,343 INFO L87 Difference]: Start difference. First operand 1706 states and 2323 transitions. Second operand has 30 states, 30 states have (on average 5.2) internal successors, (156), 30 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:12,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:02:12,646 INFO L93 Difference]: Finished difference Result 1918 states and 2592 transitions. [2022-11-03 02:02:12,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-03 02:02:12,648 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.2) internal successors, (156), 30 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2022-11-03 02:02:12,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:02:12,654 INFO L225 Difference]: With dead ends: 1918 [2022-11-03 02:02:12,654 INFO L226 Difference]: Without dead ends: 1916 [2022-11-03 02:02:12,655 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 434 SyntacticMatches, 7 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=168, Invalid=1092, Unknown=0, NotChecked=0, Total=1260 [2022-11-03 02:02:12,656 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 124 mSDsluCounter, 672 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 716 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 158 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:02:12,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 716 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 158 Unchecked, 0.0s Time] [2022-11-03 02:02:12,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1916 states. [2022-11-03 02:02:12,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1916 to 1862. [2022-11-03 02:02:12,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1862 states, 1861 states have (on average 1.3551853842020418) internal successors, (2522), 1861 states have internal predecessors, (2522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:12,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1862 states to 1862 states and 2522 transitions. [2022-11-03 02:02:12,728 INFO L78 Accepts]: Start accepts. Automaton has 1862 states and 2522 transitions. Word has length 79 [2022-11-03 02:02:12,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:02:12,728 INFO L495 AbstractCegarLoop]: Abstraction has 1862 states and 2522 transitions. [2022-11-03 02:02:12,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 5.2) internal successors, (156), 30 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:12,729 INFO L276 IsEmpty]: Start isEmpty. Operand 1862 states and 2522 transitions. [2022-11-03 02:02:12,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-03 02:02:12,733 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:02:12,733 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:02:12,742 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2022-11-03 02:02:12,967 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-11-03 02:02:13,182 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-03 02:02:13,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:02:13,342 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:02:13,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:02:13,342 INFO L85 PathProgramCache]: Analyzing trace with hash 954006031, now seen corresponding path program 1 times [2022-11-03 02:02:13,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:02:13,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1478488085] [2022-11-03 02:02:13,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:13,344 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:02:13,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:02:13,346 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:02:13,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-11-03 02:02:13,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:13,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 1324 conjuncts, 81 conjunts are in the unsatisfiable core [2022-11-03 02:02:13,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:14,770 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 37 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:14,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:02:15,274 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 37 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:15,276 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:02:15,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1478488085] [2022-11-03 02:02:15,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1478488085] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:02:15,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [688152082] [2022-11-03 02:02:15,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:15,277 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:02:15,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:02:15,278 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:02:15,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2022-11-03 02:02:16,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:16,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 1324 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:02:16,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:16,112 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:02:16,112 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:02:16,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [688152082] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:02:16,112 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:02:16,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6] total 13 [2022-11-03 02:02:16,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369117125] [2022-11-03 02:02:16,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:02:16,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:02:16,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:02:16,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:02:16,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:02:16,114 INFO L87 Difference]: Start difference. First operand 1862 states and 2522 transitions. Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:16,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:02:16,409 INFO L93 Difference]: Finished difference Result 4098 states and 5512 transitions. [2022-11-03 02:02:16,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:02:16,410 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2022-11-03 02:02:16,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:02:16,420 INFO L225 Difference]: With dead ends: 4098 [2022-11-03 02:02:16,421 INFO L226 Difference]: Without dead ends: 3332 [2022-11-03 02:02:16,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:02:16,424 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 148 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:02:16,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 248 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:02:16,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3332 states. [2022-11-03 02:02:16,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3332 to 1862. [2022-11-03 02:02:16,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1862 states, 1861 states have (on average 1.337990327780763) internal successors, (2490), 1861 states have internal predecessors, (2490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:16,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1862 states to 1862 states and 2490 transitions. [2022-11-03 02:02:16,515 INFO L78 Accepts]: Start accepts. Automaton has 1862 states and 2490 transitions. Word has length 79 [2022-11-03 02:02:16,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:02:16,515 INFO L495 AbstractCegarLoop]: Abstraction has 1862 states and 2490 transitions. [2022-11-03 02:02:16,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:16,516 INFO L276 IsEmpty]: Start isEmpty. Operand 1862 states and 2490 transitions. [2022-11-03 02:02:16,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-03 02:02:16,522 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:02:16,522 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:02:16,552 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-11-03 02:02:16,742 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2022-11-03 02:02:16,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:02:16,939 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:02:16,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:02:16,939 INFO L85 PathProgramCache]: Analyzing trace with hash 881619473, now seen corresponding path program 1 times [2022-11-03 02:02:16,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:02:16,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [830766761] [2022-11-03 02:02:16,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:16,941 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:02:16,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:02:16,942 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:02:16,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-11-03 02:02:17,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:17,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 1324 conjuncts, 81 conjunts are in the unsatisfiable core [2022-11-03 02:02:17,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:18,244 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 37 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:18,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:02:18,668 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 37 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:18,669 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:02:18,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [830766761] [2022-11-03 02:02:18,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [830766761] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:02:18,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [434728615] [2022-11-03 02:02:18,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:18,669 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:02:18,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:02:18,672 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:02:18,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2022-11-03 02:02:19,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:19,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 1324 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:02:19,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:19,490 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:02:19,490 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:02:19,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [434728615] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:02:19,490 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:02:19,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6] total 13 [2022-11-03 02:02:19,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939811566] [2022-11-03 02:02:19,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:02:19,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:02:19,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:02:19,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:02:19,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:02:19,492 INFO L87 Difference]: Start difference. First operand 1862 states and 2490 transitions. Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:19,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:02:19,808 INFO L93 Difference]: Finished difference Result 3492 states and 4710 transitions. [2022-11-03 02:02:19,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:02:19,809 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2022-11-03 02:02:19,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:02:19,818 INFO L225 Difference]: With dead ends: 3492 [2022-11-03 02:02:19,819 INFO L226 Difference]: Without dead ends: 2782 [2022-11-03 02:02:19,821 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:02:19,821 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 145 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:02:19,822 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 249 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:02:19,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2782 states. [2022-11-03 02:02:19,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2782 to 1862. [2022-11-03 02:02:19,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1862 states, 1861 states have (on average 1.3207952713594842) internal successors, (2458), 1861 states have internal predecessors, (2458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:19,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1862 states to 1862 states and 2458 transitions. [2022-11-03 02:02:19,909 INFO L78 Accepts]: Start accepts. Automaton has 1862 states and 2458 transitions. Word has length 79 [2022-11-03 02:02:19,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:02:19,909 INFO L495 AbstractCegarLoop]: Abstraction has 1862 states and 2458 transitions. [2022-11-03 02:02:19,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:19,910 INFO L276 IsEmpty]: Start isEmpty. Operand 1862 states and 2458 transitions. [2022-11-03 02:02:19,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-03 02:02:19,914 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:02:19,914 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:02:19,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2022-11-03 02:02:20,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-11-03 02:02:20,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:02:20,319 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:02:20,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:02:20,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1583219347, now seen corresponding path program 1 times [2022-11-03 02:02:20,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:02:20,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [267955096] [2022-11-03 02:02:20,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:20,321 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:02:20,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:02:20,323 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:02:20,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-11-03 02:02:20,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:20,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 1324 conjuncts, 81 conjunts are in the unsatisfiable core [2022-11-03 02:02:20,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:21,939 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 37 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:21,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:02:22,377 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 37 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:22,377 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:02:22,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [267955096] [2022-11-03 02:02:22,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [267955096] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:02:22,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1625322822] [2022-11-03 02:02:22,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:22,378 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:02:22,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:02:22,380 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:02:22,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2022-11-03 02:02:23,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:23,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 1324 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:02:23,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:23,212 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:02:23,213 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:02:23,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1625322822] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:02:23,213 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:02:23,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6] total 13 [2022-11-03 02:02:23,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824955436] [2022-11-03 02:02:23,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:02:23,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:02:23,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:02:23,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:02:23,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:02:23,215 INFO L87 Difference]: Start difference. First operand 1862 states and 2458 transitions. Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:23,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:02:23,467 INFO L93 Difference]: Finished difference Result 4108 states and 5391 transitions. [2022-11-03 02:02:23,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:02:23,468 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2022-11-03 02:02:23,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:02:23,477 INFO L225 Difference]: With dead ends: 4108 [2022-11-03 02:02:23,477 INFO L226 Difference]: Without dead ends: 3454 [2022-11-03 02:02:23,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:02:23,480 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 142 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:02:23,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 250 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:02:23,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3454 states. [2022-11-03 02:02:23,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3454 to 1862. [2022-11-03 02:02:23,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1862 states, 1861 states have (on average 1.3036002149382053) internal successors, (2426), 1861 states have internal predecessors, (2426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:23,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1862 states to 1862 states and 2426 transitions. [2022-11-03 02:02:23,562 INFO L78 Accepts]: Start accepts. Automaton has 1862 states and 2426 transitions. Word has length 79 [2022-11-03 02:02:23,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:02:23,563 INFO L495 AbstractCegarLoop]: Abstraction has 1862 states and 2426 transitions. [2022-11-03 02:02:23,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:23,563 INFO L276 IsEmpty]: Start isEmpty. Operand 1862 states and 2426 transitions. [2022-11-03 02:02:23,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-03 02:02:23,568 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:02:23,568 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:02:23,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (35)] Forceful destruction successful, exit code 0 [2022-11-03 02:02:23,792 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-11-03 02:02:23,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:02:23,978 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:02:23,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:02:23,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1325544555, now seen corresponding path program 1 times [2022-11-03 02:02:23,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:02:23,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [922520092] [2022-11-03 02:02:23,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:23,980 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:02:23,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:02:23,981 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:02:23,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-11-03 02:02:24,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:24,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 1324 conjuncts, 81 conjunts are in the unsatisfiable core [2022-11-03 02:02:24,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:25,380 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 37 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:25,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:02:25,886 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 37 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:25,887 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:02:25,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [922520092] [2022-11-03 02:02:25,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [922520092] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:02:25,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [258845273] [2022-11-03 02:02:25,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:25,888 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:02:25,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:02:25,889 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:02:25,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2022-11-03 02:02:26,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:26,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 1324 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:02:26,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:26,708 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:02:26,709 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:02:26,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [258845273] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:02:26,709 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:02:26,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6] total 13 [2022-11-03 02:02:26,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163378250] [2022-11-03 02:02:26,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:02:26,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:02:26,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:02:26,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:02:26,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:02:26,711 INFO L87 Difference]: Start difference. First operand 1862 states and 2426 transitions. Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:26,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:02:26,967 INFO L93 Difference]: Finished difference Result 3284 states and 4318 transitions. [2022-11-03 02:02:26,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:02:26,968 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2022-11-03 02:02:26,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:02:26,976 INFO L225 Difference]: With dead ends: 3284 [2022-11-03 02:02:26,976 INFO L226 Difference]: Without dead ends: 2686 [2022-11-03 02:02:26,978 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:02:26,979 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 139 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:02:26,979 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 251 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:02:26,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2686 states. [2022-11-03 02:02:27,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2686 to 1862. [2022-11-03 02:02:27,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1862 states, 1861 states have (on average 1.2864051585169265) internal successors, (2394), 1861 states have internal predecessors, (2394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:27,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1862 states to 1862 states and 2394 transitions. [2022-11-03 02:02:27,061 INFO L78 Accepts]: Start accepts. Automaton has 1862 states and 2394 transitions. Word has length 79 [2022-11-03 02:02:27,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:02:27,062 INFO L495 AbstractCegarLoop]: Abstraction has 1862 states and 2394 transitions. [2022-11-03 02:02:27,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:27,062 INFO L276 IsEmpty]: Start isEmpty. Operand 1862 states and 2394 transitions. [2022-11-03 02:02:27,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-03 02:02:27,067 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:02:27,067 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:02:27,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-11-03 02:02:27,286 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (37)] Forceful destruction successful, exit code 0 [2022-11-03 02:02:27,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:02:27,483 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:02:27,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:02:27,483 INFO L85 PathProgramCache]: Analyzing trace with hash 597683479, now seen corresponding path program 1 times [2022-11-03 02:02:27,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:02:27,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2136561796] [2022-11-03 02:02:27,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:27,485 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:02:27,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:02:27,485 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:02:27,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-11-03 02:02:27,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:27,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 1324 conjuncts, 81 conjunts are in the unsatisfiable core [2022-11-03 02:02:27,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:28,850 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 37 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:28,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:02:29,286 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 37 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:29,286 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:02:29,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2136561796] [2022-11-03 02:02:29,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2136561796] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:02:29,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [894871806] [2022-11-03 02:02:29,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:29,287 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:02:29,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:02:29,289 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:02:29,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2022-11-03 02:02:29,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:29,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 1324 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:02:30,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:30,084 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:02:30,084 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:02:30,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [894871806] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:02:30,085 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:02:30,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6] total 13 [2022-11-03 02:02:30,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029459539] [2022-11-03 02:02:30,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:02:30,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:02:30,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:02:30,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:02:30,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:02:30,086 INFO L87 Difference]: Start difference. First operand 1862 states and 2394 transitions. Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:30,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:02:30,338 INFO L93 Difference]: Finished difference Result 4112 states and 5261 transitions. [2022-11-03 02:02:30,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:02:30,339 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2022-11-03 02:02:30,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:02:30,346 INFO L225 Difference]: With dead ends: 4112 [2022-11-03 02:02:30,346 INFO L226 Difference]: Without dead ends: 3570 [2022-11-03 02:02:30,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:02:30,348 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 136 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 252 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 02:02:30,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 252 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:02:30,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3570 states. [2022-11-03 02:02:30,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3570 to 1862. [2022-11-03 02:02:30,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1862 states, 1861 states have (on average 1.2692101020956474) internal successors, (2362), 1861 states have internal predecessors, (2362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:30,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1862 states to 1862 states and 2362 transitions. [2022-11-03 02:02:30,430 INFO L78 Accepts]: Start accepts. Automaton has 1862 states and 2362 transitions. Word has length 79 [2022-11-03 02:02:30,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:02:30,431 INFO L495 AbstractCegarLoop]: Abstraction has 1862 states and 2362 transitions. [2022-11-03 02:02:30,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:30,431 INFO L276 IsEmpty]: Start isEmpty. Operand 1862 states and 2362 transitions. [2022-11-03 02:02:30,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-03 02:02:30,435 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:02:30,435 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:02:30,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2022-11-03 02:02:30,658 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (39)] Forceful destruction successful, exit code 0 [2022-11-03 02:02:30,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:02:30,855 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:02:30,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:02:30,855 INFO L85 PathProgramCache]: Analyzing trace with hash 738232089, now seen corresponding path program 1 times [2022-11-03 02:02:30,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:02:30,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1769641907] [2022-11-03 02:02:30,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:30,857 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:02:30,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:02:30,858 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:02:30,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-11-03 02:02:31,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:31,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 1324 conjuncts, 81 conjunts are in the unsatisfiable core [2022-11-03 02:02:31,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:32,173 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 37 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:32,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:02:32,665 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 37 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:32,666 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:02:32,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1769641907] [2022-11-03 02:02:32,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1769641907] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:02:32,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1553881373] [2022-11-03 02:02:32,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:32,666 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:02:32,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:02:32,671 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:02:32,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2022-11-03 02:02:33,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:33,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 1324 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:02:33,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:33,552 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:02:33,553 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:02:33,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1553881373] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:02:33,553 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:02:33,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6] total 13 [2022-11-03 02:02:33,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465245190] [2022-11-03 02:02:33,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:02:33,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:02:33,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:02:33,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:02:33,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:02:33,556 INFO L87 Difference]: Start difference. First operand 1862 states and 2362 transitions. Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:33,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:02:33,840 INFO L93 Difference]: Finished difference Result 3076 states and 3926 transitions. [2022-11-03 02:02:33,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:02:33,841 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2022-11-03 02:02:33,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:02:33,850 INFO L225 Difference]: With dead ends: 3076 [2022-11-03 02:02:33,850 INFO L226 Difference]: Without dead ends: 2590 [2022-11-03 02:02:33,852 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:02:33,853 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 133 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:02:33,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 253 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:02:33,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2590 states. [2022-11-03 02:02:33,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2590 to 1862. [2022-11-03 02:02:33,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1862 states, 1861 states have (on average 1.2520150456743686) internal successors, (2330), 1861 states have internal predecessors, (2330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:33,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1862 states to 1862 states and 2330 transitions. [2022-11-03 02:02:33,929 INFO L78 Accepts]: Start accepts. Automaton has 1862 states and 2330 transitions. Word has length 79 [2022-11-03 02:02:33,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:02:33,929 INFO L495 AbstractCegarLoop]: Abstraction has 1862 states and 2330 transitions. [2022-11-03 02:02:33,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:33,929 INFO L276 IsEmpty]: Start isEmpty. Operand 1862 states and 2330 transitions. [2022-11-03 02:02:33,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-03 02:02:33,933 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:02:33,934 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:02:33,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2022-11-03 02:02:34,154 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (41)] Forceful destruction successful, exit code 0 [2022-11-03 02:02:34,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:02:34,351 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:02:34,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:02:34,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1067206245, now seen corresponding path program 1 times [2022-11-03 02:02:34,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:02:34,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [673817929] [2022-11-03 02:02:34,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:34,352 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:02:34,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:02:34,353 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:02:34,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-11-03 02:02:34,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:34,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 1324 conjuncts, 81 conjunts are in the unsatisfiable core [2022-11-03 02:02:34,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:35,656 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 37 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:35,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:02:36,028 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 37 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:36,029 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:02:36,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [673817929] [2022-11-03 02:02:36,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [673817929] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:02:36,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [302759319] [2022-11-03 02:02:36,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:36,029 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:02:36,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:02:36,030 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:02:36,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (43)] Waiting until timeout for monitored process [2022-11-03 02:02:36,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:36,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 1324 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:02:36,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:36,915 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:02:36,915 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:02:36,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [302759319] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:02:36,915 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:02:36,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6] total 13 [2022-11-03 02:02:36,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456092591] [2022-11-03 02:02:36,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:02:36,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:02:36,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:02:36,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:02:36,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:02:36,918 INFO L87 Difference]: Start difference. First operand 1862 states and 2330 transitions. Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:37,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:02:37,154 INFO L93 Difference]: Finished difference Result 2410 states and 3047 transitions. [2022-11-03 02:02:37,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:02:37,154 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2022-11-03 02:02:37,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:02:37,161 INFO L225 Difference]: With dead ends: 2410 [2022-11-03 02:02:37,161 INFO L226 Difference]: Without dead ends: 2180 [2022-11-03 02:02:37,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:02:37,163 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 122 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:02:37,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 279 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:02:37,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2180 states. [2022-11-03 02:02:37,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2180 to 1905. [2022-11-03 02:02:37,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1905 states, 1904 states have (on average 1.252626050420168) internal successors, (2385), 1904 states have internal predecessors, (2385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:37,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1905 states to 1905 states and 2385 transitions. [2022-11-03 02:02:37,238 INFO L78 Accepts]: Start accepts. Automaton has 1905 states and 2385 transitions. Word has length 79 [2022-11-03 02:02:37,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:02:37,239 INFO L495 AbstractCegarLoop]: Abstraction has 1905 states and 2385 transitions. [2022-11-03 02:02:37,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:37,239 INFO L276 IsEmpty]: Start isEmpty. Operand 1905 states and 2385 transitions. [2022-11-03 02:02:37,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-03 02:02:37,243 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:02:37,243 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:02:37,248 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (43)] Ended with exit code 0 [2022-11-03 02:02:37,462 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (42)] Ended with exit code 0 [2022-11-03 02:02:37,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:02:37,648 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:02:37,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:02:37,649 INFO L85 PathProgramCache]: Analyzing trace with hash -366141667, now seen corresponding path program 1 times [2022-11-03 02:02:37,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:02:37,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1053340950] [2022-11-03 02:02:37,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:37,650 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:02:37,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:02:37,651 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:02:37,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-11-03 02:02:38,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:38,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 1324 conjuncts, 81 conjunts are in the unsatisfiable core [2022-11-03 02:02:38,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:38,955 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 37 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:38,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:02:39,346 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 37 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:39,347 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:02:39,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1053340950] [2022-11-03 02:02:39,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1053340950] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:02:39,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [526462099] [2022-11-03 02:02:39,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:39,347 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:02:39,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:02:39,349 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:02:39,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (45)] Waiting until timeout for monitored process [2022-11-03 02:02:40,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:40,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 1324 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:02:40,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:40,183 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:02:40,184 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:02:40,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [526462099] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:02:40,184 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:02:40,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6] total 13 [2022-11-03 02:02:40,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641931131] [2022-11-03 02:02:40,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:02:40,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:02:40,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:02:40,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:02:40,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:02:40,185 INFO L87 Difference]: Start difference. First operand 1905 states and 2385 transitions. Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:40,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:02:40,414 INFO L93 Difference]: Finished difference Result 2144 states and 2696 transitions. [2022-11-03 02:02:40,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:02:40,419 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2022-11-03 02:02:40,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:02:40,423 INFO L225 Difference]: With dead ends: 2144 [2022-11-03 02:02:40,423 INFO L226 Difference]: Without dead ends: 2016 [2022-11-03 02:02:40,424 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:02:40,425 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 115 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 292 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 02:02:40,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 292 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:02:40,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2016 states. [2022-11-03 02:02:40,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2016 to 1814. [2022-11-03 02:02:40,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1814 states, 1813 states have (on average 1.2504136789851075) internal successors, (2267), 1813 states have internal predecessors, (2267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:40,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1814 states to 1814 states and 2267 transitions. [2022-11-03 02:02:40,491 INFO L78 Accepts]: Start accepts. Automaton has 1814 states and 2267 transitions. Word has length 79 [2022-11-03 02:02:40,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:02:40,491 INFO L495 AbstractCegarLoop]: Abstraction has 1814 states and 2267 transitions. [2022-11-03 02:02:40,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:40,491 INFO L276 IsEmpty]: Start isEmpty. Operand 1814 states and 2267 transitions. [2022-11-03 02:02:40,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-03 02:02:40,495 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:02:40,495 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:02:40,518 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2022-11-03 02:02:40,719 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (45)] Ended with exit code 0 [2022-11-03 02:02:40,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:02:40,916 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:02:40,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:02:40,916 INFO L85 PathProgramCache]: Analyzing trace with hash -364294625, now seen corresponding path program 1 times [2022-11-03 02:02:40,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:02:40,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [579666290] [2022-11-03 02:02:40,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:40,918 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:02:40,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:02:40,919 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:02:40,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-11-03 02:02:41,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:41,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 1324 conjuncts, 81 conjunts are in the unsatisfiable core [2022-11-03 02:02:41,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:42,299 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 37 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:42,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:02:42,679 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 37 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:42,679 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:02:42,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [579666290] [2022-11-03 02:02:42,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [579666290] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:02:42,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1113165624] [2022-11-03 02:02:42,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:42,680 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:02:42,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:02:42,681 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:02:42,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (47)] Waiting until timeout for monitored process [2022-11-03 02:02:43,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:43,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 1324 conjuncts, 81 conjunts are in the unsatisfiable core [2022-11-03 02:02:43,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:44,448 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 37 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:44,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:02:44,779 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 37 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:44,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1113165624] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:02:44,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659735716] [2022-11-03 02:02:44,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:44,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:02:44,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:02:44,781 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:02:44,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-11-03 02:02:45,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:45,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 1324 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-03 02:02:45,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:45,860 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-03 02:02:45,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:02:46,583 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-03 02:02:46,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659735716] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:02:46,584 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:02:46,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 12, 10] total 28 [2022-11-03 02:02:46,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650975663] [2022-11-03 02:02:46,584 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:02:46,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-03 02:02:46,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:02:46,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-03 02:02:46,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2022-11-03 02:02:46,586 INFO L87 Difference]: Start difference. First operand 1814 states and 2267 transitions. Second operand has 28 states, 28 states have (on average 8.25) internal successors, (231), 28 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 02:02:47,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:02:47,840 INFO L93 Difference]: Finished difference Result 2061 states and 2579 transitions. [2022-11-03 02:02:47,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 02:02:47,843 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 8.25) internal successors, (231), 28 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 79 [2022-11-03 02:02:47,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:02:47,845 INFO L225 Difference]: With dead ends: 2061 [2022-11-03 02:02:47,846 INFO L226 Difference]: Without dead ends: 1376 [2022-11-03 02:02:47,847 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 480 GetRequests, 440 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=237, Invalid=1245, Unknown=0, NotChecked=0, Total=1482 [2022-11-03 02:02:47,848 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 322 mSDsluCounter, 952 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 996 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 170 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:02:47,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [322 Valid, 996 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 119 Invalid, 0 Unknown, 170 Unchecked, 0.3s Time] [2022-11-03 02:02:47,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1376 states. [2022-11-03 02:02:47,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1376 to 1300. [2022-11-03 02:02:47,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1300 states, 1299 states have (on average 1.268668206312548) internal successors, (1648), 1299 states have internal predecessors, (1648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:47,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1300 states to 1300 states and 1648 transitions. [2022-11-03 02:02:47,922 INFO L78 Accepts]: Start accepts. Automaton has 1300 states and 1648 transitions. Word has length 79 [2022-11-03 02:02:47,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:02:47,923 INFO L495 AbstractCegarLoop]: Abstraction has 1300 states and 1648 transitions. [2022-11-03 02:02:47,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 8.25) internal successors, (231), 28 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 02:02:47,923 INFO L276 IsEmpty]: Start isEmpty. Operand 1300 states and 1648 transitions. [2022-11-03 02:02:47,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-03 02:02:47,926 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:02:47,926 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:02:47,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2022-11-03 02:02:48,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-11-03 02:02:48,354 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (47)] Ended with exit code 0 [2022-11-03 02:02:48,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:02:48,549 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:02:48,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:02:48,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1642098875, now seen corresponding path program 1 times [2022-11-03 02:02:48,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:02:48,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1160698729] [2022-11-03 02:02:48,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:48,551 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:02:48,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:02:48,552 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:02:48,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2022-11-03 02:02:48,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:49,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 1324 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:02:49,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:49,075 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:02:49,075 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:02:49,075 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:02:49,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1160698729] [2022-11-03 02:02:49,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1160698729] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:02:49,076 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:02:49,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:02:49,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728133199] [2022-11-03 02:02:49,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:02:49,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:02:49,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:02:49,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:02:49,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:02:49,077 INFO L87 Difference]: Start difference. First operand 1300 states and 1648 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:49,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:02:49,173 INFO L93 Difference]: Finished difference Result 1492 states and 1904 transitions. [2022-11-03 02:02:49,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:02:49,175 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2022-11-03 02:02:49,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:02:49,177 INFO L225 Difference]: With dead ends: 1492 [2022-11-03 02:02:49,177 INFO L226 Difference]: Without dead ends: 952 [2022-11-03 02:02:49,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:02:49,179 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 58 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:02:49,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 178 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:02:49,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 952 states. [2022-11-03 02:02:49,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 952 to 888. [2022-11-03 02:02:49,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 887 states have (on average 1.2435174746335964) internal successors, (1103), 887 states have internal predecessors, (1103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:49,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 1103 transitions. [2022-11-03 02:02:49,212 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 1103 transitions. Word has length 79 [2022-11-03 02:02:49,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:02:49,213 INFO L495 AbstractCegarLoop]: Abstraction has 888 states and 1103 transitions. [2022-11-03 02:02:49,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:49,213 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 1103 transitions. [2022-11-03 02:02:49,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-03 02:02:49,216 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:02:49,216 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-03 02:02:49,238 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (49)] Ended with exit code 0 [2022-11-03 02:02:49,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:02:49,431 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:02:49,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:02:49,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1029237223, now seen corresponding path program 1 times [2022-11-03 02:02:49,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:02:49,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1134643933] [2022-11-03 02:02:49,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:49,432 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:02:49,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:02:49,433 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:02:49,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2022-11-03 02:02:50,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:50,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 1961 conjuncts, 148 conjunts are in the unsatisfiable core [2022-11-03 02:02:50,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:54,083 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 72 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:54,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:04:03,251 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 72 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:04:03,251 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:04:03,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1134643933] [2022-11-03 02:04:03,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1134643933] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:04:03,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1954378404] [2022-11-03 02:04:03,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:04:03,252 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:04:03,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:04:03,258 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:04:03,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (51)] Waiting until timeout for monitored process [2022-11-03 02:04:04,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:04:04,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 1961 conjuncts, 148 conjunts are in the unsatisfiable core [2022-11-03 02:04:04,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:04:06,679 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 72 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:04:06,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:06:18,272 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 72 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:06:18,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1954378404] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:06:18,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946187831] [2022-11-03 02:06:18,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:06:18,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:06:18,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:06:18,274 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:06:18,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-11-03 02:06:18,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:06:18,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 1961 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:06:18,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:06:21,646 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 30 proven. 70 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 02:06:21,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:06:22,914 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 91 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 02:06:22,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946187831] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:06:22,915 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:06:22,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26, 26, 10, 9] total 67 [2022-11-03 02:06:22,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582990295] [2022-11-03 02:06:22,916 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:06:22,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-11-03 02:06:22,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:06:22,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-11-03 02:06:22,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=4120, Unknown=72, NotChecked=0, Total=4422 [2022-11-03 02:06:22,919 INFO L87 Difference]: Start difference. First operand 888 states and 1103 transitions. Second operand has 67 states, 67 states have (on average 5.074626865671642) internal successors, (340), 67 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:06:33,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:06:33,409 INFO L93 Difference]: Finished difference Result 1934 states and 2430 transitions. [2022-11-03 02:06:33,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-11-03 02:06:33,410 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 5.074626865671642) internal successors, (340), 67 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2022-11-03 02:06:33,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:06:33,412 INFO L225 Difference]: With dead ends: 1934 [2022-11-03 02:06:33,412 INFO L226 Difference]: Without dead ends: 1807 [2022-11-03 02:06:33,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 751 GetRequests, 642 SyntacticMatches, 8 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1608 ImplicationChecksByTransitivity, 215.2s TimeCoverageRelationStatistics Valid=561, Invalid=9873, Unknown=72, NotChecked=0, Total=10506 [2022-11-03 02:06:33,414 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 386 mSDsluCounter, 5542 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 5679 SdHoareTripleChecker+Invalid, 1241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1107 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:06:33,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [386 Valid, 5679 Invalid, 1241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 127 Invalid, 0 Unknown, 1107 Unchecked, 0.3s Time] [2022-11-03 02:06:33,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1807 states. [2022-11-03 02:06:33,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1807 to 1322. [2022-11-03 02:06:33,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1322 states, 1321 states have (on average 1.2339137017411053) internal successors, (1630), 1321 states have internal predecessors, (1630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:06:33,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1322 states to 1322 states and 1630 transitions. [2022-11-03 02:06:33,466 INFO L78 Accepts]: Start accepts. Automaton has 1322 states and 1630 transitions. Word has length 116 [2022-11-03 02:06:33,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:06:33,467 INFO L495 AbstractCegarLoop]: Abstraction has 1322 states and 1630 transitions. [2022-11-03 02:06:33,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 5.074626865671642) internal successors, (340), 67 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:06:33,467 INFO L276 IsEmpty]: Start isEmpty. Operand 1322 states and 1630 transitions. [2022-11-03 02:06:33,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-03 02:06:33,469 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:06:33,470 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:06:33,495 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (50)] Ended with exit code 0 [2022-11-03 02:06:33,689 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (51)] Ended with exit code 0 [2022-11-03 02:06:33,907 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-11-03 02:06:34,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:06:34,083 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:06:34,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:06:34,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1987925823, now seen corresponding path program 1 times [2022-11-03 02:06:34,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:06:34,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1081939541] [2022-11-03 02:06:34,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:06:34,085 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:06:34,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:06:34,085 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:06:34,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2022-11-03 02:06:34,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:06:34,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 1961 conjuncts, 81 conjunts are in the unsatisfiable core [2022-11-03 02:06:34,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:06:35,639 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 78 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:06:35,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:06:36,025 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 78 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:06:36,026 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:06:36,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1081939541] [2022-11-03 02:06:36,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1081939541] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:06:36,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [393094404] [2022-11-03 02:06:36,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:06:36,026 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:06:36,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:06:36,027 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:06:36,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (54)] Waiting until timeout for monitored process [2022-11-03 02:06:36,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:06:36,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 1961 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:06:36,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:06:37,012 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 02:06:37,012 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:06:37,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [393094404] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:06:37,012 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:06:37,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6] total 11 [2022-11-03 02:06:37,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758156920] [2022-11-03 02:06:37,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:06:37,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:06:37,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:06:37,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:06:37,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:06:37,014 INFO L87 Difference]: Start difference. First operand 1322 states and 1630 transitions. Second operand has 5 states, 5 states have (on average 22.4) internal successors, (112), 5 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:06:37,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:06:37,202 INFO L93 Difference]: Finished difference Result 1636 states and 2040 transitions. [2022-11-03 02:06:37,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:06:37,203 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.4) internal successors, (112), 5 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2022-11-03 02:06:37,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:06:37,205 INFO L225 Difference]: With dead ends: 1636 [2022-11-03 02:06:37,205 INFO L226 Difference]: Without dead ends: 1398 [2022-11-03 02:06:37,206 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 339 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:06:37,206 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 246 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:06:37,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 166 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:06:37,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1398 states. [2022-11-03 02:06:37,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1398 to 1288. [2022-11-03 02:06:37,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1288 states, 1287 states have (on average 1.2268842268842268) internal successors, (1579), 1287 states have internal predecessors, (1579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:06:37,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1288 states to 1288 states and 1579 transitions. [2022-11-03 02:06:37,240 INFO L78 Accepts]: Start accepts. Automaton has 1288 states and 1579 transitions. Word has length 116 [2022-11-03 02:06:37,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:06:37,240 INFO L495 AbstractCegarLoop]: Abstraction has 1288 states and 1579 transitions. [2022-11-03 02:06:37,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.4) internal successors, (112), 5 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:06:37,241 INFO L276 IsEmpty]: Start isEmpty. Operand 1288 states and 1579 transitions. [2022-11-03 02:06:37,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-03 02:06:37,243 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:06:37,243 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-03 02:06:37,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (53)] Forceful destruction successful, exit code 0 [2022-11-03 02:06:37,472 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (54)] Ended with exit code 0 [2022-11-03 02:06:37,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:06:37,668 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:06:37,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:06:37,668 INFO L85 PathProgramCache]: Analyzing trace with hash -658021923, now seen corresponding path program 1 times [2022-11-03 02:06:37,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:06:37,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [517246722] [2022-11-03 02:06:37,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:06:37,670 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:06:37,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:06:37,670 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:06:37,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2022-11-03 02:06:38,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:06:38,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 1961 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:06:38,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:06:38,321 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-11-03 02:06:38,321 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:06:38,321 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:06:38,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [517246722] [2022-11-03 02:06:38,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [517246722] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:06:38,322 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:06:38,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:06:38,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165179176] [2022-11-03 02:06:38,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:06:38,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:06:38,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:06:38,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:06:38,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:06:38,323 INFO L87 Difference]: Start difference. First operand 1288 states and 1579 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:06:38,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:06:38,420 INFO L93 Difference]: Finished difference Result 1798 states and 2213 transitions. [2022-11-03 02:06:38,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:06:38,421 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2022-11-03 02:06:38,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:06:38,422 INFO L225 Difference]: With dead ends: 1798 [2022-11-03 02:06:38,422 INFO L226 Difference]: Without dead ends: 1006 [2022-11-03 02:06:38,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:06:38,424 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 70 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:06:38,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 160 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:06:38,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1006 states. [2022-11-03 02:06:38,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1006 to 1006. [2022-11-03 02:06:38,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1006 states, 1005 states have (on average 1.2228855721393035) internal successors, (1229), 1005 states have internal predecessors, (1229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:06:38,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1006 states to 1006 states and 1229 transitions. [2022-11-03 02:06:38,466 INFO L78 Accepts]: Start accepts. Automaton has 1006 states and 1229 transitions. Word has length 116 [2022-11-03 02:06:38,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:06:38,467 INFO L495 AbstractCegarLoop]: Abstraction has 1006 states and 1229 transitions. [2022-11-03 02:06:38,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:06:38,467 INFO L276 IsEmpty]: Start isEmpty. Operand 1006 states and 1229 transitions. [2022-11-03 02:06:38,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-03 02:06:38,469 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:06:38,469 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-03 02:06:38,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (55)] Forceful destruction successful, exit code 0 [2022-11-03 02:06:38,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:06:38,683 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:06:38,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:06:38,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1278060003, now seen corresponding path program 1 times [2022-11-03 02:06:38,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:06:38,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [738872807] [2022-11-03 02:06:38,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:06:38,684 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:06:38,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:06:38,685 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:06:38,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2022-11-03 02:06:39,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:06:39,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 1961 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:06:39,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:06:39,326 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-11-03 02:06:39,326 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:06:39,326 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:06:39,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [738872807] [2022-11-03 02:06:39,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [738872807] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:06:39,327 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:06:39,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:06:39,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164161886] [2022-11-03 02:06:39,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:06:39,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:06:39,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:06:39,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:06:39,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:06:39,329 INFO L87 Difference]: Start difference. First operand 1006 states and 1229 transitions. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:06:39,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:06:39,429 INFO L93 Difference]: Finished difference Result 1866 states and 2278 transitions. [2022-11-03 02:06:39,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:06:39,430 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2022-11-03 02:06:39,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:06:39,431 INFO L225 Difference]: With dead ends: 1866 [2022-11-03 02:06:39,431 INFO L226 Difference]: Without dead ends: 1006 [2022-11-03 02:06:39,432 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:06:39,432 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 70 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:06:39,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 158 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:06:39,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1006 states. [2022-11-03 02:06:39,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1006 to 1006. [2022-11-03 02:06:39,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1006 states, 1005 states have (on average 1.217910447761194) internal successors, (1224), 1005 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:06:39,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1006 states to 1006 states and 1224 transitions. [2022-11-03 02:06:39,474 INFO L78 Accepts]: Start accepts. Automaton has 1006 states and 1224 transitions. Word has length 116 [2022-11-03 02:06:39,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:06:39,475 INFO L495 AbstractCegarLoop]: Abstraction has 1006 states and 1224 transitions. [2022-11-03 02:06:39,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:06:39,475 INFO L276 IsEmpty]: Start isEmpty. Operand 1006 states and 1224 transitions. [2022-11-03 02:06:39,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-03 02:06:39,477 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:06:39,477 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-03 02:06:39,501 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (56)] Ended with exit code 0 [2022-11-03 02:06:39,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:06:39,699 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:06:39,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:06:39,699 INFO L85 PathProgramCache]: Analyzing trace with hash -266951461, now seen corresponding path program 2 times [2022-11-03 02:06:39,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:06:39,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [478095403] [2022-11-03 02:06:39,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:06:39,701 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:06:39,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:06:39,702 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:06:39,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2022-11-03 02:06:40,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:06:40,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:06:40,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 1961 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:06:40,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:06:40,351 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-11-03 02:06:40,351 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:06:40,352 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:06:40,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [478095403] [2022-11-03 02:06:40,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [478095403] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:06:40,352 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:06:40,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:06:40,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302629914] [2022-11-03 02:06:40,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:06:40,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:06:40,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:06:40,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:06:40,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:06:40,353 INFO L87 Difference]: Start difference. First operand 1006 states and 1224 transitions. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:06:40,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:06:40,468 INFO L93 Difference]: Finished difference Result 1458 states and 1793 transitions. [2022-11-03 02:06:40,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:06:40,469 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2022-11-03 02:06:40,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:06:40,470 INFO L225 Difference]: With dead ends: 1458 [2022-11-03 02:06:40,470 INFO L226 Difference]: Without dead ends: 802 [2022-11-03 02:06:40,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:06:40,471 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 70 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:06:40,471 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 156 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:06:40,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 802 states. [2022-11-03 02:06:40,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 802 to 802. [2022-11-03 02:06:40,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 802 states, 801 states have (on average 1.2222222222222223) internal successors, (979), 801 states have internal predecessors, (979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:06:40,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 802 states to 802 states and 979 transitions. [2022-11-03 02:06:40,501 INFO L78 Accepts]: Start accepts. Automaton has 802 states and 979 transitions. Word has length 116 [2022-11-03 02:06:40,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:06:40,501 INFO L495 AbstractCegarLoop]: Abstraction has 802 states and 979 transitions. [2022-11-03 02:06:40,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:06:40,502 INFO L276 IsEmpty]: Start isEmpty. Operand 802 states and 979 transitions. [2022-11-03 02:06:40,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-03 02:06:40,503 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:06:40,503 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-03 02:06:40,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (57)] Forceful destruction successful, exit code 0 [2022-11-03 02:06:40,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:06:40,716 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:06:40,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:06:40,716 INFO L85 PathProgramCache]: Analyzing trace with hash -47527651, now seen corresponding path program 2 times [2022-11-03 02:06:40,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:06:40,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [538414659] [2022-11-03 02:06:40,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:06:40,718 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:06:40,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:06:40,719 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:06:40,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2022-11-03 02:06:41,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:06:41,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:06:41,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 1961 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:06:41,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:06:41,347 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-11-03 02:06:41,347 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:06:41,347 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:06:41,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [538414659] [2022-11-03 02:06:41,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [538414659] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:06:41,348 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:06:41,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:06:41,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076947655] [2022-11-03 02:06:41,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:06:41,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:06:41,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:06:41,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:06:41,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:06:41,351 INFO L87 Difference]: Start difference. First operand 802 states and 979 transitions. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:06:41,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:06:41,461 INFO L93 Difference]: Finished difference Result 1470 states and 1798 transitions. [2022-11-03 02:06:41,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:06:41,462 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2022-11-03 02:06:41,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:06:41,463 INFO L225 Difference]: With dead ends: 1470 [2022-11-03 02:06:41,463 INFO L226 Difference]: Without dead ends: 802 [2022-11-03 02:06:41,465 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:06:41,466 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 70 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:06:41,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 154 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:06:41,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 802 states. [2022-11-03 02:06:41,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 802 to 802. [2022-11-03 02:06:41,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 802 states, 801 states have (on average 1.2184769038701624) internal successors, (976), 801 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:06:41,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 802 states to 802 states and 976 transitions. [2022-11-03 02:06:41,504 INFO L78 Accepts]: Start accepts. Automaton has 802 states and 976 transitions. Word has length 116 [2022-11-03 02:06:41,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:06:41,505 INFO L495 AbstractCegarLoop]: Abstraction has 802 states and 976 transitions. [2022-11-03 02:06:41,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:06:41,505 INFO L276 IsEmpty]: Start isEmpty. Operand 802 states and 976 transitions. [2022-11-03 02:06:41,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-03 02:06:41,506 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:06:41,507 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:06:41,538 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (58)] Forceful destruction successful, exit code 0 [2022-11-03 02:06:41,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:06:41,722 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:06:41,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:06:41,722 INFO L85 PathProgramCache]: Analyzing trace with hash -387358651, now seen corresponding path program 1 times [2022-11-03 02:06:41,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:06:41,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2022498862] [2022-11-03 02:06:41,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:06:41,724 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:06:41,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:06:41,725 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:06:41,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (59)] Waiting until timeout for monitored process [2022-11-03 02:06:42,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:06:42,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 1961 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:06:42,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:06:42,349 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-11-03 02:06:42,350 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:06:42,350 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:06:42,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2022498862] [2022-11-03 02:06:42,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2022498862] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:06:42,350 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:06:42,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:06:42,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500601730] [2022-11-03 02:06:42,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:06:42,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:06:42,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:06:42,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:06:42,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:06:42,352 INFO L87 Difference]: Start difference. First operand 802 states and 976 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:06:42,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:06:42,446 INFO L93 Difference]: Finished difference Result 1230 states and 1513 transitions. [2022-11-03 02:06:42,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:06:42,446 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2022-11-03 02:06:42,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:06:42,447 INFO L225 Difference]: With dead ends: 1230 [2022-11-03 02:06:42,447 INFO L226 Difference]: Without dead ends: 692 [2022-11-03 02:06:42,448 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:06:42,448 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 70 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:06:42,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 152 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:06:42,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2022-11-03 02:06:42,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 692. [2022-11-03 02:06:42,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 692 states, 691 states have (on average 1.2257597684515196) internal successors, (847), 691 states have internal predecessors, (847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:06:42,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 847 transitions. [2022-11-03 02:06:42,473 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 847 transitions. Word has length 116 [2022-11-03 02:06:42,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:06:42,473 INFO L495 AbstractCegarLoop]: Abstraction has 692 states and 847 transitions. [2022-11-03 02:06:42,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:06:42,473 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 847 transitions. [2022-11-03 02:06:42,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-03 02:06:42,474 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:06:42,475 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-03 02:06:42,496 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (59)] Ended with exit code 0 [2022-11-03 02:06:42,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:06:42,675 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:06:42,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:06:42,675 INFO L85 PathProgramCache]: Analyzing trace with hash -155994083, now seen corresponding path program 3 times [2022-11-03 02:06:42,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:06:42,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [50489441] [2022-11-03 02:06:42,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:06:42,677 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:06:42,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:06:42,677 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:06:42,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (60)] Waiting until timeout for monitored process [2022-11-03 02:06:43,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 02:06:43,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:06:43,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 1324 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-03 02:06:43,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:06:43,972 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-03 02:06:43,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:06:44,993 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-03 02:06:44,993 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:06:44,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [50489441] [2022-11-03 02:06:44,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [50489441] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:06:44,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [423936984] [2022-11-03 02:06:44,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:06:44,994 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:06:44,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:06:44,999 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:06:45,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (61)] Waiting until timeout for monitored process [2022-11-03 02:06:45,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 02:06:45,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:06:45,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 1324 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-03 02:06:45,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:06:46,595 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-03 02:06:46,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:06:47,411 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-03 02:06:47,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [423936984] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:06:47,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664990654] [2022-11-03 02:06:47,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:06:47,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:06:47,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:06:47,412 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:06:47,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-11-03 02:06:47,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 02:06:47,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:06:47,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 1324 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-03 02:06:47,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:06:48,446 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-03 02:06:48,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:06:49,206 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-03 02:06:49,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664990654] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:06:49,206 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:06:49,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 16 [2022-11-03 02:06:49,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723796263] [2022-11-03 02:06:49,207 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:06:49,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-03 02:06:49,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:06:49,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-03 02:06:49,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:06:49,208 INFO L87 Difference]: Start difference. First operand 692 states and 847 transitions. Second operand has 16 states, 16 states have (on average 9.875) internal successors, (158), 16 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:06:49,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:06:49,575 INFO L93 Difference]: Finished difference Result 697 states and 852 transitions. [2022-11-03 02:06:49,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:06:49,575 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 9.875) internal successors, (158), 16 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2022-11-03 02:06:49,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:06:49,577 INFO L225 Difference]: With dead ends: 697 [2022-11-03 02:06:49,577 INFO L226 Difference]: Without dead ends: 695 [2022-11-03 02:06:49,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 698 GetRequests, 669 SyntacticMatches, 9 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2022-11-03 02:06:49,578 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 361 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:06:49,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [361 Valid, 210 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 47 Unchecked, 0.1s Time] [2022-11-03 02:06:49,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 695 states. [2022-11-03 02:06:49,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 695 to 692. [2022-11-03 02:06:49,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 692 states, 691 states have (on average 1.2257597684515196) internal successors, (847), 691 states have internal predecessors, (847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:06:49,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 847 transitions. [2022-11-03 02:06:49,600 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 847 transitions. Word has length 116 [2022-11-03 02:06:49,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:06:49,601 INFO L495 AbstractCegarLoop]: Abstraction has 692 states and 847 transitions. [2022-11-03 02:06:49,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 9.875) internal successors, (158), 16 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:06:49,601 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 847 transitions. [2022-11-03 02:06:49,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-11-03 02:06:49,602 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:06:49,602 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-03 02:06:49,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (60)] Forceful destruction successful, exit code 0 [2022-11-03 02:06:49,808 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (61)] Forceful destruction successful, exit code 0 [2022-11-03 02:06:50,028 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-11-03 02:06:50,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:06:50,203 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:06:50,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:06:50,203 INFO L85 PathProgramCache]: Analyzing trace with hash 378453317, now seen corresponding path program 2 times [2022-11-03 02:06:50,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:06:50,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1671814404] [2022-11-03 02:06:50,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:06:50,205 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:06:50,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:06:50,206 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:06:50,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (63)] Waiting until timeout for monitored process [2022-11-03 02:06:50,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:06:50,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:06:50,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 2598 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-03 02:06:50,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:06:51,412 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 128 proven. 89 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 02:06:51,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:06:51,876 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 128 proven. 89 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 02:06:51,877 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:06:51,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1671814404] [2022-11-03 02:06:51,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1671814404] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:06:51,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2121794375] [2022-11-03 02:06:51,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:06:51,877 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:06:51,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:06:51,879 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:06:51,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (64)] Waiting until timeout for monitored process [2022-11-03 02:06:53,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:06:53,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:06:53,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 2598 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-03 02:06:53,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:06:53,809 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 128 proven. 89 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 02:06:53,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:06:54,156 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 128 proven. 89 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 02:06:54,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2121794375] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:06:54,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019977746] [2022-11-03 02:06:54,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:06:54,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:06:54,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:06:54,160 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:06:54,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-11-03 02:06:54,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:06:54,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:06:54,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 2598 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:06:54,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:06:55,140 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 130 proven. 70 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 02:06:55,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:06:55,354 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 191 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 02:06:55,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019977746] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:06:55,354 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:06:55,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 10, 9] total 28 [2022-11-03 02:06:55,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551267360] [2022-11-03 02:06:55,355 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:06:55,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-03 02:06:55,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:06:55,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-03 02:06:55,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2022-11-03 02:06:55,357 INFO L87 Difference]: Start difference. First operand 692 states and 847 transitions. Second operand has 28 states, 28 states have (on average 10.642857142857142) internal successors, (298), 28 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:06:57,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:06:57,460 INFO L93 Difference]: Finished difference Result 2306 states and 2837 transitions. [2022-11-03 02:06:57,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-11-03 02:06:57,460 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 10.642857142857142) internal successors, (298), 28 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 153 [2022-11-03 02:06:57,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:06:57,463 INFO L225 Difference]: With dead ends: 2306 [2022-11-03 02:06:57,464 INFO L226 Difference]: Without dead ends: 2084 [2022-11-03 02:06:57,465 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 993 GetRequests, 918 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1239 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=745, Invalid=4805, Unknown=0, NotChecked=0, Total=5550 [2022-11-03 02:06:57,466 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 1080 mSDsluCounter, 1530 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1080 SdHoareTripleChecker+Valid, 1622 SdHoareTripleChecker+Invalid, 789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 426 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:06:57,466 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1080 Valid, 1622 Invalid, 789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 347 Invalid, 0 Unknown, 426 Unchecked, 0.6s Time] [2022-11-03 02:06:57,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2084 states. [2022-11-03 02:06:57,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2084 to 858. [2022-11-03 02:06:57,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 858 states, 857 states have (on average 1.2252042007001167) internal successors, (1050), 857 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:06:57,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 1050 transitions. [2022-11-03 02:06:57,511 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 1050 transitions. Word has length 153 [2022-11-03 02:06:57,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:06:57,512 INFO L495 AbstractCegarLoop]: Abstraction has 858 states and 1050 transitions. [2022-11-03 02:06:57,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 10.642857142857142) internal successors, (298), 28 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:06:57,512 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 1050 transitions. [2022-11-03 02:06:57,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-11-03 02:06:57,514 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:06:57,514 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:06:57,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-11-03 02:06:57,753 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (63)] Ended with exit code 0 [2022-11-03 02:06:57,942 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (64)] Ended with exit code 0 [2022-11-03 02:06:58,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:06:58,134 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:06:58,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:06:58,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1916793347, now seen corresponding path program 3 times [2022-11-03 02:06:58,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:06:58,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1641115950] [2022-11-03 02:06:58,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:06:58,136 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:06:58,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:06:58,137 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:06:58,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (66)] Waiting until timeout for monitored process [2022-11-03 02:06:58,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 02:06:58,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:06:58,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 687 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 02:06:58,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:06:59,416 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 47 proven. 9 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2022-11-03 02:06:59,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:07:00,228 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 47 proven. 9 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2022-11-03 02:07:00,228 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:07:00,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1641115950] [2022-11-03 02:07:00,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1641115950] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:07:00,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1650615107] [2022-11-03 02:07:00,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:07:00,229 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:07:00,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:07:00,230 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:07:00,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (67)] Waiting until timeout for monitored process [2022-11-03 02:07:00,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 02:07:00,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:07:00,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 687 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:07:00,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:07:01,240 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 53 proven. 3 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2022-11-03 02:07:01,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:07:02,215 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 47 proven. 9 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2022-11-03 02:07:02,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1650615107] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:07:02,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800623276] [2022-11-03 02:07:02,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:07:02,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:07:02,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:07:02,216 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:07:02,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-11-03 02:07:02,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 02:07:02,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:07:02,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 687 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:07:02,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:07:02,805 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 53 proven. 3 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2022-11-03 02:07:02,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:07:03,838 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 47 proven. 9 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2022-11-03 02:07:03,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800623276] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:07:03,838 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:07:03,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 15 [2022-11-03 02:07:03,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382594053] [2022-11-03 02:07:03,839 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:07:03,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-03 02:07:03,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:07:03,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-03 02:07:03,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-11-03 02:07:03,841 INFO L87 Difference]: Start difference. First operand 858 states and 1050 transitions. Second operand has 15 states, 15 states have (on average 12.666666666666666) internal successors, (190), 15 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:07:04,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:07:04,182 INFO L93 Difference]: Finished difference Result 1775 states and 2213 transitions. [2022-11-03 02:07:04,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 02:07:04,183 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 12.666666666666666) internal successors, (190), 15 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 153 [2022-11-03 02:07:04,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:07:04,186 INFO L225 Difference]: With dead ends: 1775 [2022-11-03 02:07:04,186 INFO L226 Difference]: Without dead ends: 1626 [2022-11-03 02:07:04,187 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 918 GetRequests, 895 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2022-11-03 02:07:04,187 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 216 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 187 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:07:04,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 385 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 187 Unchecked, 0.1s Time] [2022-11-03 02:07:04,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1626 states. [2022-11-03 02:07:04,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1626 to 866. [2022-11-03 02:07:04,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 865 states have (on average 1.223121387283237) internal successors, (1058), 865 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:07:04,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 1058 transitions. [2022-11-03 02:07:04,232 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 1058 transitions. Word has length 153 [2022-11-03 02:07:04,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:07:04,233 INFO L495 AbstractCegarLoop]: Abstraction has 866 states and 1058 transitions. [2022-11-03 02:07:04,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 12.666666666666666) internal successors, (190), 15 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:07:04,233 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 1058 transitions. [2022-11-03 02:07:04,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-11-03 02:07:04,235 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:04,235 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-03 02:07:04,276 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-11-03 02:07:04,465 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (66)] Forceful destruction successful, exit code 0 [2022-11-03 02:07:04,659 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (67)] Ended with exit code 0 [2022-11-03 02:07:04,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:07:04,855 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:07:04,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:04,855 INFO L85 PathProgramCache]: Analyzing trace with hash 328445445, now seen corresponding path program 1 times [2022-11-03 02:07:04,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:07:04,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1136065815] [2022-11-03 02:07:04,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:04,857 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:07:04,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:07:04,858 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:07:04,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (69)] Waiting until timeout for monitored process [2022-11-03 02:07:05,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:05,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 2598 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-03 02:07:05,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:07:06,083 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 126 proven. 93 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:07:06,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:07:06,631 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 126 proven. 93 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:07:06,631 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:07:06,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1136065815] [2022-11-03 02:07:06,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1136065815] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:07:06,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1227647683] [2022-11-03 02:07:06,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:06,631 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:07:06,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:07:06,632 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:07:06,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (70)] Waiting until timeout for monitored process [2022-11-03 02:07:08,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:08,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 2598 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-03 02:07:08,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:07:08,503 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 126 proven. 93 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:07:08,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:07:08,868 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 126 proven. 93 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:07:08,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1227647683] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:07:08,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958607496] [2022-11-03 02:07:08,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:08,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:07:08,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:07:08,870 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:07:08,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-11-03 02:07:09,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:09,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 2598 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-03 02:07:09,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:07:10,146 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 126 proven. 93 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:07:10,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:07:10,774 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 126 proven. 93 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:07:10,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958607496] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:07:10,774 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:07:10,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14, 14, 14, 14] total 41 [2022-11-03 02:07:10,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279762210] [2022-11-03 02:07:10,775 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:07:10,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-03 02:07:10,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:07:10,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-03 02:07:10,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1509, Unknown=0, NotChecked=0, Total=1640 [2022-11-03 02:07:10,776 INFO L87 Difference]: Start difference. First operand 866 states and 1058 transitions. Second operand has 41 states, 41 states have (on average 8.292682926829269) internal successors, (340), 41 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:07:13,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:07:13,320 INFO L93 Difference]: Finished difference Result 3251 states and 3954 transitions. [2022-11-03 02:07:13,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-03 02:07:13,320 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 8.292682926829269) internal successors, (340), 41 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 153 [2022-11-03 02:07:13,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:07:13,324 INFO L225 Difference]: With dead ends: 3251 [2022-11-03 02:07:13,324 INFO L226 Difference]: Without dead ends: 2957 [2022-11-03 02:07:13,326 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 962 GetRequests, 879 SyntacticMatches, 3 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1174 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=674, Invalid=5968, Unknown=0, NotChecked=0, Total=6642 [2022-11-03 02:07:13,327 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 1254 mSDsluCounter, 2138 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1254 SdHoareTripleChecker+Valid, 2240 SdHoareTripleChecker+Invalid, 757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 324 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:07:13,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1254 Valid, 2240 Invalid, 757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 386 Invalid, 0 Unknown, 324 Unchecked, 0.7s Time] [2022-11-03 02:07:13,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2957 states. [2022-11-03 02:07:13,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2957 to 1968. [2022-11-03 02:07:13,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1968 states, 1967 states have (on average 1.2114895780376207) internal successors, (2383), 1967 states have internal predecessors, (2383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:07:13,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1968 states to 1968 states and 2383 transitions. [2022-11-03 02:07:13,423 INFO L78 Accepts]: Start accepts. Automaton has 1968 states and 2383 transitions. Word has length 153 [2022-11-03 02:07:13,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:07:13,423 INFO L495 AbstractCegarLoop]: Abstraction has 1968 states and 2383 transitions. [2022-11-03 02:07:13,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 8.292682926829269) internal successors, (340), 41 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:07:13,424 INFO L276 IsEmpty]: Start isEmpty. Operand 1968 states and 2383 transitions. [2022-11-03 02:07:13,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-11-03 02:07:13,426 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:13,427 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-03 02:07:13,472 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-11-03 02:07:13,674 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (69)] Ended with exit code 0 [2022-11-03 02:07:13,863 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (70)] Ended with exit code 0 [2022-11-03 02:07:14,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:07:14,055 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:07:14,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:14,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1432498491, now seen corresponding path program 1 times [2022-11-03 02:07:14,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:07:14,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [952477009] [2022-11-03 02:07:14,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:14,058 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:07:14,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:07:14,061 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:07:14,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (72)] Waiting until timeout for monitored process [2022-11-03 02:07:14,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:14,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 2598 conjuncts, 61 conjunts are in the unsatisfiable core [2022-11-03 02:07:14,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:07:16,577 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 35 proven. 195 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:07:16,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:07:22,778 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 35 proven. 195 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:07:22,778 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:07:22,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [952477009] [2022-11-03 02:07:22,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [952477009] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:07:22,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [458955453] [2022-11-03 02:07:22,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:22,779 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:07:22,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:07:22,780 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:07:22,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (73)] Waiting until timeout for monitored process [2022-11-03 02:07:24,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:24,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 2598 conjuncts, 57 conjunts are in the unsatisfiable core [2022-11-03 02:07:24,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:07:27,353 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 17 proven. 213 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:07:27,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:07:38,006 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 17 proven. 213 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:07:38,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [458955453] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:07:38,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252434739] [2022-11-03 02:07:38,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:38,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:07:38,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:07:38,008 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:07:38,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-11-03 02:07:38,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:38,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 2598 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-03 02:07:38,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:07:41,682 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 87 proven. 132 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:07:41,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:07:44,895 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 62 proven. 157 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:07:44,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252434739] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:07:44,895 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:07:44,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 23, 23, 16, 16] total 119 [2022-11-03 02:07:44,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423189933] [2022-11-03 02:07:44,896 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:07:44,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2022-11-03 02:07:44,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:07:44,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2022-11-03 02:07:44,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=13506, Unknown=3, NotChecked=0, Total=14042 [2022-11-03 02:07:44,899 INFO L87 Difference]: Start difference. First operand 1968 states and 2383 transitions. Second operand has 119 states, 119 states have (on average 6.042016806722689) internal successors, (719), 119 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:08:30,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:08:30,192 INFO L93 Difference]: Finished difference Result 9391 states and 11509 transitions. [2022-11-03 02:08:30,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 251 states. [2022-11-03 02:08:30,193 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 6.042016806722689) internal successors, (719), 119 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 153 [2022-11-03 02:08:30,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:08:30,200 INFO L225 Difference]: With dead ends: 9391 [2022-11-03 02:08:30,200 INFO L226 Difference]: Without dead ends: 9228 [2022-11-03 02:08:30,211 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1206 GetRequests, 850 SyntacticMatches, 16 SemanticMatches, 340 ConstructedPredicates, 0 IntricatePredicates, 7 DeprecatedPredicates, 33042 ImplicationChecksByTransitivity, 66.8s TimeCoverageRelationStatistics Valid=5605, Invalid=111014, Unknown=3, NotChecked=0, Total=116622 [2022-11-03 02:08:30,212 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 1523 mSDsluCounter, 7512 mSDsCounter, 0 mSdLazyCounter, 1106 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1523 SdHoareTripleChecker+Valid, 7607 SdHoareTripleChecker+Invalid, 4573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3406 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:08:30,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1523 Valid, 7607 Invalid, 4573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1106 Invalid, 0 Unknown, 3406 Unchecked, 1.1s Time] [2022-11-03 02:08:30,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9228 states. [2022-11-03 02:08:30,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9228 to 7409. [2022-11-03 02:08:30,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7409 states, 7408 states have (on average 1.2277267818574513) internal successors, (9095), 7408 states have internal predecessors, (9095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:08:30,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7409 states to 7409 states and 9095 transitions. [2022-11-03 02:08:30,525 INFO L78 Accepts]: Start accepts. Automaton has 7409 states and 9095 transitions. Word has length 153 [2022-11-03 02:08:30,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:08:30,525 INFO L495 AbstractCegarLoop]: Abstraction has 7409 states and 9095 transitions. [2022-11-03 02:08:30,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 6.042016806722689) internal successors, (719), 119 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:08:30,526 INFO L276 IsEmpty]: Start isEmpty. Operand 7409 states and 9095 transitions. [2022-11-03 02:08:30,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-11-03 02:08:30,534 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:08:30,535 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1] [2022-11-03 02:08:30,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (73)] Forceful destruction successful, exit code 0 [2022-11-03 02:08:30,786 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-11-03 02:08:30,965 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (72)] Ended with exit code 0 [2022-11-03 02:08:31,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:08:31,146 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:08:31,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:08:31,147 INFO L85 PathProgramCache]: Analyzing trace with hash -2019304505, now seen corresponding path program 1 times [2022-11-03 02:08:31,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:08:31,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [982143578] [2022-11-03 02:08:31,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:31,148 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:08:31,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:08:31,149 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:08:31,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (75)] Waiting until timeout for monitored process [2022-11-03 02:08:31,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:31,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 2598 conjuncts, 57 conjunts are in the unsatisfiable core [2022-11-03 02:08:31,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:08:32,923 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 17 proven. 213 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:08:32,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:08:38,924 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 17 proven. 213 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:08:38,924 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:08:38,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [982143578] [2022-11-03 02:08:38,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [982143578] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:08:38,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [12321731] [2022-11-03 02:08:38,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:38,924 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:08:38,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:08:38,925 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:08:38,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (76)] Waiting until timeout for monitored process [2022-11-03 02:08:40,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:40,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 2598 conjuncts, 57 conjunts are in the unsatisfiable core [2022-11-03 02:08:40,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:08:41,041 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 17 proven. 213 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:08:41,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:08:41,884 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 17 proven. 213 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:08:41,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [12321731] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:08:41,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021300801] [2022-11-03 02:08:41,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:41,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:08:41,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:08:41,885 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:08:41,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-11-03 02:08:42,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:42,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 2598 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-03 02:08:42,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:08:43,966 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 17 proven. 213 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:08:43,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:08:45,872 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 17 proven. 213 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:08:45,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021300801] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:08:45,872 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:08:45,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23, 23, 24, 24] total 63 [2022-11-03 02:08:45,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339047694] [2022-11-03 02:08:45,873 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:08:45,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-11-03 02:08:45,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:08:45,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-11-03 02:08:45,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=3710, Unknown=2, NotChecked=0, Total=3906 [2022-11-03 02:08:45,875 INFO L87 Difference]: Start difference. First operand 7409 states and 9095 transitions. Second operand has 63 states, 63 states have (on average 5.349206349206349) internal successors, (337), 63 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:08:49,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:08:49,454 INFO L93 Difference]: Finished difference Result 14710 states and 18089 transitions. [2022-11-03 02:08:49,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-03 02:08:49,455 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 5.349206349206349) internal successors, (337), 63 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 153 [2022-11-03 02:08:49,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:08:49,466 INFO L225 Difference]: With dead ends: 14710 [2022-11-03 02:08:49,467 INFO L226 Difference]: Without dead ends: 14156 [2022-11-03 02:08:49,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 950 GetRequests, 849 SyntacticMatches, 8 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1572 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=569, Invalid=8359, Unknown=2, NotChecked=0, Total=8930 [2022-11-03 02:08:49,472 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 766 mSDsluCounter, 4183 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 766 SdHoareTripleChecker+Valid, 4313 SdHoareTripleChecker+Invalid, 2252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1651 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:08:49,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [766 Valid, 4313 Invalid, 2252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 565 Invalid, 0 Unknown, 1651 Unchecked, 0.8s Time] [2022-11-03 02:08:49,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14156 states. [2022-11-03 02:08:49,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14156 to 9573. [2022-11-03 02:08:49,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9573 states, 9572 states have (on average 1.225344755536983) internal successors, (11729), 9572 states have internal predecessors, (11729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:08:49,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9573 states to 9573 states and 11729 transitions. [2022-11-03 02:08:49,850 INFO L78 Accepts]: Start accepts. Automaton has 9573 states and 11729 transitions. Word has length 153 [2022-11-03 02:08:49,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:08:49,851 INFO L495 AbstractCegarLoop]: Abstraction has 9573 states and 11729 transitions. [2022-11-03 02:08:49,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 5.349206349206349) internal successors, (337), 63 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:08:49,851 INFO L276 IsEmpty]: Start isEmpty. Operand 9573 states and 11729 transitions. [2022-11-03 02:08:49,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-11-03 02:08:49,863 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:08:49,863 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2022-11-03 02:08:49,911 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-11-03 02:08:50,099 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (76)] Ended with exit code 0 [2022-11-03 02:08:50,310 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (75)] Ended with exit code 0 [2022-11-03 02:08:50,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:08:50,491 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:08:50,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:08:50,491 INFO L85 PathProgramCache]: Analyzing trace with hash -244297143, now seen corresponding path program 2 times [2022-11-03 02:08:50,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:08:50,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [39927248] [2022-11-03 02:08:50,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:08:50,493 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:08:50,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:08:50,494 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:08:50,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (78)] Waiting until timeout for monitored process [2022-11-03 02:08:51,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:08:51,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:08:51,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 2598 conjuncts, 174 conjunts are in the unsatisfiable core [2022-11-03 02:08:51,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:08:57,592 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 0 proven. 230 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:08:57,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:13:25,715 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 0 proven. 230 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:13:25,715 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:13:25,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [39927248] [2022-11-03 02:13:25,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [39927248] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:13:25,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1927248210] [2022-11-03 02:13:25,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:13:25,716 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:13:25,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:13:25,718 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:13:25,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95882af2-7094-4b23-a926-ecf72ae0715a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (79)] Waiting until timeout for monitored process [2022-11-03 02:13:27,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:13:27,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:13:27,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 2598 conjuncts, 174 conjunts are in the unsatisfiable core [2022-11-03 02:13:27,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:13:29,557 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 0 proven. 230 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:13:29,557 INFO L328 TraceCheckSpWp]: Computing backward predicates...