./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.krebs.1.prop1-func-interl.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/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_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.krebs.1.prop1-func-interl.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/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_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/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 d7599fcf7e03749d82b28bd7d258c2b67bb77e4046198f3fa9cda552ff29f1ea --- 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 02:31:04,016 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:31:04,019 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:31:04,046 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:31:04,046 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:31:04,047 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:31:04,049 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:31:04,050 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:31:04,052 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:31:04,053 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:31:04,054 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:31:04,055 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:31:04,056 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:31:04,057 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:31:04,058 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:31:04,059 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:31:04,060 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:31:04,061 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:31:04,063 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:31:04,064 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:31:04,066 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:31:04,067 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:31:04,068 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:31:04,069 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:31:04,073 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:31:04,073 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:31:04,074 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:31:04,075 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:31:04,075 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:31:04,076 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:31:04,076 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:31:04,077 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:31:04,078 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:31:04,079 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:31:04,080 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:31:04,080 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:31:04,081 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:31:04,081 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:31:04,082 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:31:04,090 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:31:04,091 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:31:04,095 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 02:31:04,139 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:31:04,139 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:31:04,140 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:31:04,140 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:31:04,141 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:31:04,141 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:31:04,141 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:31:04,141 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:31:04,142 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:31:04,142 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:31:04,143 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:31:04,143 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:31:04,143 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:31:04,143 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:31:04,144 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:31:04,144 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:31:04,144 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:31:04,144 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:31:04,145 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:31:04,145 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:31:04,145 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:31:04,146 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:31:04,146 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:31:04,146 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:31:04,146 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:31:04,146 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:31:04,147 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:31:04,148 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:31:04,148 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:31:04,149 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:31:04,149 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:31:04,149 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:31:04,150 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:31:04,150 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:31:04,150 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:31:04,150 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:31:04,150 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:31:04,151 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:31:04,151 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_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d7599fcf7e03749d82b28bd7d258c2b67bb77e4046198f3fa9cda552ff29f1ea [2022-11-03 02:31:04,458 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:31:04,494 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:31:04,497 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:31:04,498 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:31:04,499 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:31:04,500 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.krebs.1.prop1-func-interl.c [2022-11-03 02:31:04,577 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/data/dc1b24fa6/7f3c1af09f6e439d963b0449f41bbd2f/FLAGbc9d99ef0 [2022-11-03 02:31:05,149 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:31:05,149 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.krebs.1.prop1-func-interl.c [2022-11-03 02:31:05,159 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/data/dc1b24fa6/7f3c1af09f6e439d963b0449f41bbd2f/FLAGbc9d99ef0 [2022-11-03 02:31:05,411 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/data/dc1b24fa6/7f3c1af09f6e439d963b0449f41bbd2f [2022-11-03 02:31:05,414 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:31:05,415 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:31:05,416 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:31:05,417 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:31:05,445 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:31:05,446 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:31:05" (1/1) ... [2022-11-03 02:31:05,449 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31110a4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:31:05, skipping insertion in model container [2022-11-03 02:31:05,449 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:31:05" (1/1) ... [2022-11-03 02:31:05,456 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:31:05,524 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:31:05,772 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_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.krebs.1.prop1-func-interl.c[1014,1027] [2022-11-03 02:31:06,023 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:31:06,041 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:31:06,052 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_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.krebs.1.prop1-func-interl.c[1014,1027] [2022-11-03 02:31:06,202 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:31:06,216 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:31:06,216 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:31:06 WrapperNode [2022-11-03 02:31:06,217 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:31:06,218 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:31:06,218 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:31:06,218 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:31:06,224 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:31:06" (1/1) ... [2022-11-03 02:31:06,275 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:31:06" (1/1) ... [2022-11-03 02:31:06,459 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1210 [2022-11-03 02:31:06,459 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:31:06,460 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:31:06,460 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:31:06,461 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:31:06,470 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:31:06" (1/1) ... [2022-11-03 02:31:06,471 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:31:06" (1/1) ... [2022-11-03 02:31:06,497 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:31:06" (1/1) ... [2022-11-03 02:31:06,498 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:31:06" (1/1) ... [2022-11-03 02:31:06,568 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:31:06" (1/1) ... [2022-11-03 02:31:06,588 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:31:06" (1/1) ... [2022-11-03 02:31:06,612 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:31:06" (1/1) ... [2022-11-03 02:31:06,622 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:31:06" (1/1) ... [2022-11-03 02:31:06,655 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:31:06,658 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:31:06,658 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:31:06,658 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:31:06,659 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:31:06" (1/1) ... [2022-11-03 02:31:06,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:31:06,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:31:06,707 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:31:06,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:31:06,746 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:31:06,747 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:31:07,049 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:31:07,051 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:31:29,110 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:31:36,701 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:31:36,701 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 02:31:36,704 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:31:36 BoogieIcfgContainer [2022-11-03 02:31:36,704 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:31:36,707 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:31:36,707 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:31:36,713 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:31:36,713 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:31:05" (1/3) ... [2022-11-03 02:31:36,714 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@83c2e45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:31:36, skipping insertion in model container [2022-11-03 02:31:36,714 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:31:06" (2/3) ... [2022-11-03 02:31:36,714 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@83c2e45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:31:36, skipping insertion in model container [2022-11-03 02:31:36,714 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:31:36" (3/3) ... [2022-11-03 02:31:36,716 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.krebs.1.prop1-func-interl.c [2022-11-03 02:31:36,735 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:31:36,735 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:31:36,794 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:31:36,804 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;@2aeaa8e6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:31:36,805 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:31:36,810 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 02:31:36,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-03 02:31:36,816 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:31:36,817 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-03 02:31:36,817 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:31:36,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:31:36,824 INFO L85 PathProgramCache]: Analyzing trace with hash 8887746, now seen corresponding path program 1 times [2022-11-03 02:31:36,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:31:36,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392415553] [2022-11-03 02:31:36,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:31:36,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:31:37,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 02:31:37,236 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-03 02:31:37,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 02:31:37,468 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-03 02:31:37,470 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-03 02:31:37,471 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-03 02:31:37,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:31:37,478 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-03 02:31:37,482 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-03 02:31:37,502 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2022-11-03 02:31:37,511 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 02:31:37 BoogieIcfgContainer [2022-11-03 02:31:37,511 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-03 02:31:37,512 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-03 02:31:37,512 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-03 02:31:37,512 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-03 02:31:37,516 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:31:36" (3/4) ... [2022-11-03 02:31:37,519 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-03 02:31:37,519 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-03 02:31:37,522 INFO L158 Benchmark]: Toolchain (without parser) took 32104.89ms. Allocated memory was 104.9MB in the beginning and 1.1GB in the end (delta: 983.6MB). Free memory was 74.1MB in the beginning and 728.7MB in the end (delta: -654.6MB). Peak memory consumption was 329.7MB. Max. memory is 16.1GB. [2022-11-03 02:31:37,522 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 104.9MB. Free memory is still 60.5MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:31:37,523 INFO L158 Benchmark]: CACSL2BoogieTranslator took 800.70ms. Allocated memory is still 104.9MB. Free memory was 73.9MB in the beginning and 50.8MB in the end (delta: 23.1MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. [2022-11-03 02:31:37,525 INFO L158 Benchmark]: Boogie Procedure Inliner took 241.51ms. Allocated memory was 104.9MB in the beginning and 138.4MB in the end (delta: 33.6MB). Free memory was 50.8MB in the beginning and 93.8MB in the end (delta: -43.0MB). Peak memory consumption was 21.2MB. Max. memory is 16.1GB. [2022-11-03 02:31:37,528 INFO L158 Benchmark]: Boogie Preprocessor took 196.62ms. Allocated memory is still 138.4MB. Free memory was 93.8MB in the beginning and 81.8MB in the end (delta: 12.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-03 02:31:37,530 INFO L158 Benchmark]: RCFGBuilder took 30046.56ms. Allocated memory was 138.4MB in the beginning and 1.1GB in the end (delta: 950.0MB). Free memory was 81.8MB in the beginning and 785.3MB in the end (delta: -703.5MB). Peak memory consumption was 645.0MB. Max. memory is 16.1GB. [2022-11-03 02:31:37,531 INFO L158 Benchmark]: TraceAbstraction took 804.94ms. Allocated memory is still 1.1GB. Free memory was 784.3MB in the beginning and 729.8MB in the end (delta: 54.5MB). Peak memory consumption was 54.5MB. Max. memory is 16.1GB. [2022-11-03 02:31:37,532 INFO L158 Benchmark]: Witness Printer took 7.31ms. Allocated memory is still 1.1GB. Free memory was 729.8MB in the beginning and 728.7MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 02:31:37,535 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 104.9MB. Free memory is still 60.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 800.70ms. Allocated memory is still 104.9MB. Free memory was 73.9MB in the beginning and 50.8MB in the end (delta: 23.1MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 241.51ms. Allocated memory was 104.9MB in the beginning and 138.4MB in the end (delta: 33.6MB). Free memory was 50.8MB in the beginning and 93.8MB in the end (delta: -43.0MB). Peak memory consumption was 21.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 196.62ms. Allocated memory is still 138.4MB. Free memory was 93.8MB in the beginning and 81.8MB in the end (delta: 12.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * RCFGBuilder took 30046.56ms. Allocated memory was 138.4MB in the beginning and 1.1GB in the end (delta: 950.0MB). Free memory was 81.8MB in the beginning and 785.3MB in the end (delta: -703.5MB). Peak memory consumption was 645.0MB. Max. memory is 16.1GB. * TraceAbstraction took 804.94ms. Allocated memory is still 1.1GB. Free memory was 784.3MB in the beginning and 729.8MB in the end (delta: 54.5MB). Peak memory consumption was 54.5MB. Max. memory is 16.1GB. * Witness Printer took 7.31ms. Allocated memory is still 1.1GB. Free memory was 729.8MB in the beginning and 728.7MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 20]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseComplement at line 169, overapproximation of bitwiseOr at line 164, overapproximation of bitwiseAnd at line 142. Possible FailurePath: [L25] const SORT_1 mask_SORT_1 = (SORT_1)-1 >> (sizeof(SORT_1) * 8 - 1); [L26] const SORT_1 msb_SORT_1 = (SORT_1)1 << (1 - 1); [L28] const SORT_2 mask_SORT_2 = (SORT_2)-1 >> (sizeof(SORT_2) * 8 - 8); [L29] const SORT_2 msb_SORT_2 = (SORT_2)1 << (8 - 1); [L31] const SORT_3 mask_SORT_3 = (SORT_3)-1 >> (sizeof(SORT_3) * 8 - 24); [L32] const SORT_3 msb_SORT_3 = (SORT_3)1 << (24 - 1); [L34] const SORT_4 mask_SORT_4 = (SORT_4)-1 >> (sizeof(SORT_4) * 8 - 32); [L35] const SORT_4 msb_SORT_4 = (SORT_4)1 << (32 - 1); [L37] const SORT_2 var_5 = 0; [L38] const SORT_1 var_30 = 0; [L39] const SORT_3 var_59 = 0; [L40] const SORT_4 var_61 = 5; [L41] const SORT_2 var_65 = 2; [L42] const SORT_4 var_69 = 1; [L43] const SORT_2 var_75 = 4; [L44] const SORT_4 var_77 = 2; [L45] const SORT_2 var_101 = 12; [L46] const SORT_2 var_154 = 15; [L47] const SORT_2 var_169 = 10; [L49] SORT_1 input_66; [L50] SORT_1 input_76; [L51] SORT_1 input_82; [L52] SORT_1 input_106; [L53] SORT_1 input_109; [L54] SORT_1 input_110; [L55] SORT_1 input_126; [L56] SORT_1 input_145; [L57] SORT_1 input_187; [L58] SORT_1 input_208; [L60] SORT_2 state_6 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L61] SORT_2 state_8 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L62] SORT_2 state_10 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L63] SORT_2 state_12 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L64] SORT_2 state_14 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L65] SORT_2 state_16 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L66] SORT_2 state_18 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L67] SORT_2 state_20 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L68] SORT_2 state_22 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L69] SORT_2 state_24 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L70] SORT_2 state_26 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L71] SORT_2 state_28 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L72] SORT_1 state_31 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L73] SORT_1 state_33 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L74] SORT_1 state_35 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L75] SORT_1 state_37 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L76] SORT_1 state_39 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L77] SORT_1 state_41 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L78] SORT_1 state_43 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L79] SORT_1 state_45 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L80] SORT_1 state_47 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L81] SORT_1 state_49 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L82] SORT_1 state_51 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L83] SORT_1 state_53 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L84] SORT_1 state_55 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L85] SORT_1 state_57 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L87] SORT_2 init_7_arg_1 = var_5; [L88] state_6 = init_7_arg_1 [L89] SORT_2 init_9_arg_1 = var_5; [L90] state_8 = init_9_arg_1 [L91] SORT_2 init_11_arg_1 = var_5; [L92] state_10 = init_11_arg_1 [L93] SORT_2 init_13_arg_1 = var_5; [L94] state_12 = init_13_arg_1 [L95] SORT_2 init_15_arg_1 = var_5; [L96] state_14 = init_15_arg_1 [L97] SORT_2 init_17_arg_1 = var_5; [L98] state_16 = init_17_arg_1 [L99] SORT_2 init_19_arg_1 = var_5; [L100] state_18 = init_19_arg_1 [L101] SORT_2 init_21_arg_1 = var_5; [L102] state_20 = init_21_arg_1 [L103] SORT_2 init_23_arg_1 = var_5; [L104] state_22 = init_23_arg_1 [L105] SORT_2 init_25_arg_1 = var_5; [L106] state_24 = init_25_arg_1 [L107] SORT_2 init_27_arg_1 = var_5; [L108] state_26 = init_27_arg_1 [L109] SORT_2 init_29_arg_1 = var_5; [L110] state_28 = init_29_arg_1 [L111] SORT_1 init_32_arg_1 = var_30; [L112] state_31 = init_32_arg_1 [L113] SORT_1 init_34_arg_1 = var_30; [L114] state_33 = init_34_arg_1 [L115] SORT_1 init_36_arg_1 = var_30; [L116] state_35 = init_36_arg_1 [L117] SORT_1 init_38_arg_1 = var_30; [L118] state_37 = init_38_arg_1 [L119] SORT_1 init_40_arg_1 = var_30; [L120] state_39 = init_40_arg_1 [L121] SORT_1 init_42_arg_1 = var_30; [L122] state_41 = init_42_arg_1 [L123] SORT_1 init_44_arg_1 = var_30; [L124] state_43 = init_44_arg_1 [L125] SORT_1 init_46_arg_1 = var_30; [L126] state_45 = init_46_arg_1 [L127] SORT_1 init_48_arg_1 = var_30; [L128] state_47 = init_48_arg_1 [L129] SORT_1 init_50_arg_1 = var_30; [L130] state_49 = init_50_arg_1 [L131] SORT_1 init_52_arg_1 = var_30; [L132] state_51 = init_52_arg_1 [L133] SORT_1 init_54_arg_1 = var_30; [L134] state_53 = init_54_arg_1 [L135] SORT_1 init_56_arg_1 = var_30; [L136] state_55 = init_56_arg_1 [L137] SORT_1 init_58_arg_1 = var_30; [L138] state_57 = init_58_arg_1 VAL [init_11_arg_1=0, init_13_arg_1=0, init_15_arg_1=0, init_17_arg_1=0, init_19_arg_1=0, init_21_arg_1=0, init_23_arg_1=0, init_25_arg_1=0, init_27_arg_1=0, init_29_arg_1=0, init_32_arg_1=0, init_34_arg_1=0, init_36_arg_1=0, init_38_arg_1=0, init_40_arg_1=0, init_42_arg_1=0, init_44_arg_1=0, init_46_arg_1=0, init_48_arg_1=0, init_50_arg_1=0, init_52_arg_1=0, init_54_arg_1=0, init_56_arg_1=0, init_58_arg_1=0, init_7_arg_1=0, init_9_arg_1=0, mask_SORT_1=1, mask_SORT_2=255, mask_SORT_3=4294967295, mask_SORT_4=4294967295, msb_SORT_1=1, msb_SORT_2=128, msb_SORT_3=8388608, msb_SORT_4=2147483648, state_10=0, state_12=0, state_14=0, state_16=0, state_18=0, state_20=0, state_22=0, state_24=0, state_26=0, state_28=0, state_31=0, state_33=0, state_35=0, state_37=0, state_39=0, state_41=0, state_43=0, state_45=0, state_47=0, state_49=0, state_51=0, state_53=0, state_55=0, state_57=0, state_6=0, state_8=0, var_101=12, var_154=15, var_169=10, var_30=0, var_5=0, var_59=0, var_61=5, var_65=2, var_69=1, var_75=4, var_77=2] [L141] input_66 = __VERIFIER_nondet_uchar() [L142] input_66 = input_66 & mask_SORT_1 [L143] input_76 = __VERIFIER_nondet_uchar() [L144] input_76 = input_76 & mask_SORT_1 [L145] input_82 = __VERIFIER_nondet_uchar() [L146] input_82 = input_82 & mask_SORT_1 [L147] input_106 = __VERIFIER_nondet_uchar() [L148] input_106 = input_106 & mask_SORT_1 [L149] input_109 = __VERIFIER_nondet_uchar() [L150] input_109 = input_109 & mask_SORT_1 [L151] input_110 = __VERIFIER_nondet_uchar() [L152] input_110 = input_110 & mask_SORT_1 [L153] input_126 = __VERIFIER_nondet_uchar() [L154] input_126 = input_126 & mask_SORT_1 [L155] input_145 = __VERIFIER_nondet_uchar() [L156] input_145 = input_145 & mask_SORT_1 [L157] input_187 = __VERIFIER_nondet_uchar() [L158] input_187 = input_187 & mask_SORT_1 [L159] input_208 = __VERIFIER_nondet_uchar() [L162] SORT_3 var_60_arg_0 = var_59; [L163] SORT_2 var_60_arg_1 = state_28; [L164] SORT_4 var_60 = ((SORT_4)var_60_arg_0 << 8) | var_60_arg_1; [L165] var_60 = var_60 & mask_SORT_4 [L166] SORT_4 var_62_arg_0 = var_60; [L167] SORT_4 var_62_arg_1 = var_61; [L168] SORT_1 var_62 = var_62_arg_0 <= var_62_arg_1; [L169] SORT_1 var_63_arg_0 = ~state_57; [L170] var_63_arg_0 = var_63_arg_0 & mask_SORT_1 [L171] SORT_1 var_63_arg_1 = ~var_62; [L172] var_63_arg_1 = var_63_arg_1 & mask_SORT_1 [L173] SORT_1 var_63 = var_63_arg_0 & var_63_arg_1; [L174] var_63 = var_63 & mask_SORT_1 [L175] SORT_1 bad_64_arg_0 = var_63; [L176] CALL __VERIFIER_assert(!(bad_64_arg_0)) [L20] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L20] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.7s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=7occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 4 NumberOfCodeBlocks, 4 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-11-03 02:31:37,599 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/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_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.krebs.1.prop1-func-interl.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/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_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/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 d7599fcf7e03749d82b28bd7d258c2b67bb77e4046198f3fa9cda552ff29f1ea --- 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 02:31:39,834 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:31:39,836 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:31:39,863 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:31:39,863 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:31:39,864 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:31:39,866 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:31:39,867 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:31:39,869 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:31:39,870 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:31:39,871 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:31:39,872 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:31:39,873 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:31:39,874 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:31:39,875 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:31:39,876 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:31:39,877 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:31:39,878 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:31:39,880 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:31:39,882 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:31:39,883 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:31:39,885 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:31:39,886 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:31:39,887 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:31:39,891 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:31:39,891 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:31:39,892 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:31:39,893 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:31:39,893 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:31:39,894 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:31:39,895 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:31:39,895 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:31:39,896 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:31:39,897 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:31:39,898 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:31:39,899 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:31:39,899 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:31:39,900 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:31:39,906 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:31:39,907 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:31:39,908 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:31:39,909 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2022-11-03 02:31:39,932 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:31:39,933 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:31:39,933 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:31:39,933 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:31:39,934 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:31:39,934 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:31:39,935 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:31:39,935 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:31:39,935 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:31:39,935 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:31:39,936 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:31:39,936 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:31:39,937 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:31:39,937 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:31:39,937 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:31:39,937 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:31:39,937 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:31:39,938 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 02:31:39,938 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 02:31:39,938 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 02:31:39,938 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:31:39,938 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:31:39,939 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:31:39,939 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:31:39,939 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 02:31:39,939 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:31:39,939 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:31:39,940 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:31:39,940 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:31:39,940 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:31:39,940 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 02:31:39,940 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 02:31:39,941 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:31:39,941 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:31:39,941 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 02:31:39,941 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_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d7599fcf7e03749d82b28bd7d258c2b67bb77e4046198f3fa9cda552ff29f1ea [2022-11-03 02:31:40,296 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:31:40,326 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:31:40,328 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:31:40,330 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:31:40,331 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:31:40,332 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.krebs.1.prop1-func-interl.c [2022-11-03 02:31:40,409 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/data/e5f4afdab/893c449446d74e50b8b370e444ee5a71/FLAG199701af3 [2022-11-03 02:31:41,073 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:31:41,074 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.krebs.1.prop1-func-interl.c [2022-11-03 02:31:41,088 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/data/e5f4afdab/893c449446d74e50b8b370e444ee5a71/FLAG199701af3 [2022-11-03 02:31:41,311 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/data/e5f4afdab/893c449446d74e50b8b370e444ee5a71 [2022-11-03 02:31:41,314 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:31:41,315 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:31:41,317 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:31:41,317 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:31:41,321 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:31:41,322 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:31:41" (1/1) ... [2022-11-03 02:31:41,323 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a6cac1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:31:41, skipping insertion in model container [2022-11-03 02:31:41,323 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:31:41" (1/1) ... [2022-11-03 02:31:41,336 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:31:41,412 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:31:41,557 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_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.krebs.1.prop1-func-interl.c[1014,1027] [2022-11-03 02:31:41,819 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:31:41,838 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:31:41,849 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_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.krebs.1.prop1-func-interl.c[1014,1027] [2022-11-03 02:31:42,011 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:31:42,027 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:31:42,032 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:31:42 WrapperNode [2022-11-03 02:31:42,032 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:31:42,033 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:31:42,034 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:31:42,034 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:31:42,041 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:31:42" (1/1) ... [2022-11-03 02:31:42,079 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:31:42" (1/1) ... [2022-11-03 02:31:42,143 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1210 [2022-11-03 02:31:42,143 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:31:42,144 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:31:42,144 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:31:42,145 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:31:42,154 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:31:42" (1/1) ... [2022-11-03 02:31:42,154 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:31:42" (1/1) ... [2022-11-03 02:31:42,164 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:31:42" (1/1) ... [2022-11-03 02:31:42,164 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:31:42" (1/1) ... [2022-11-03 02:31:42,188 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:31:42" (1/1) ... [2022-11-03 02:31:42,195 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:31:42" (1/1) ... [2022-11-03 02:31:42,200 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:31:42" (1/1) ... [2022-11-03 02:31:42,204 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:31:42" (1/1) ... [2022-11-03 02:31:42,215 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:31:42,219 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:31:42,220 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:31:42,224 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:31:42,228 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:31:42" (1/1) ... [2022-11-03 02:31:42,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:31:42,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:31:42,286 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:31:42,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:31:42,337 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:31:42,337 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:31:42,712 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:31:42,714 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:31:43,975 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:31:43,988 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:31:43,988 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 02:31:43,991 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:31:43 BoogieIcfgContainer [2022-11-03 02:31:43,991 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:31:43,994 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:31:43,995 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:31:43,998 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:31:43,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:31:41" (1/3) ... [2022-11-03 02:31:43,999 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c4f494f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:31:43, skipping insertion in model container [2022-11-03 02:31:43,999 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:31:42" (2/3) ... [2022-11-03 02:31:44,000 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c4f494f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:31:43, skipping insertion in model container [2022-11-03 02:31:44,000 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:31:43" (3/3) ... [2022-11-03 02:31:44,001 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.krebs.1.prop1-func-interl.c [2022-11-03 02:31:44,021 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:31:44,021 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:31:44,099 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:31:44,107 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;@6247e6bd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:31:44,107 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:31:44,111 INFO L276 IsEmpty]: Start isEmpty. Operand has 79 states, 77 states have (on average 1.4935064935064934) internal successors, (115), 78 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:31:44,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-03 02:31:44,119 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:31:44,120 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-03 02:31:44,121 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:31:44,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:31:44,128 INFO L85 PathProgramCache]: Analyzing trace with hash 28698761, now seen corresponding path program 1 times [2022-11-03 02:31:44,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:31:44,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1308564470] [2022-11-03 02:31:44,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:31:44,143 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:31:44,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:31:44,150 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:31:44,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 02:31:44,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:31:44,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 02:31:44,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:31:44,641 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 02:31:44,642 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:31:44,643 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:31:44,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1308564470] [2022-11-03 02:31:44,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1308564470] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:31:44,644 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:31:44,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:31:44,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449302690] [2022-11-03 02:31:44,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:31:44,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:31:44,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:31:44,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:31:44,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:31:44,694 INFO L87 Difference]: Start difference. First operand has 79 states, 77 states have (on average 1.4935064935064934) internal successors, (115), 78 states have internal predecessors, (115), 0 states have call successors, (0), 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 02:31:45,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:31:45,003 INFO L93 Difference]: Finished difference Result 224 states and 336 transitions. [2022-11-03 02:31:45,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:31:45,006 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-03 02:31:45,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:31:45,015 INFO L225 Difference]: With dead ends: 224 [2022-11-03 02:31:45,016 INFO L226 Difference]: Without dead ends: 147 [2022-11-03 02:31:45,018 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 02:31:45,021 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 207 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:31:45,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 295 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:31:45,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-11-03 02:31:45,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 77. [2022-11-03 02:31:45,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.4605263157894737) internal successors, (111), 76 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:31:45,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 111 transitions. [2022-11-03 02:31:45,060 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 111 transitions. Word has length 5 [2022-11-03 02:31:45,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:31:45,061 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 111 transitions. [2022-11-03 02:31:45,061 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 02:31:45,061 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 111 transitions. [2022-11-03 02:31:45,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-03 02:31:45,063 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:31:45,064 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:31:45,077 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:31:45,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:31:45,277 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:31:45,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:31:45,277 INFO L85 PathProgramCache]: Analyzing trace with hash -64281915, now seen corresponding path program 1 times [2022-11-03 02:31:45,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:31:45,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1748198537] [2022-11-03 02:31:45,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:31:45,280 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:31:45,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:31:45,282 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:31:45,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 02:31:45,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:31:45,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 1010 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:31:45,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:31:46,109 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 02:31:46,109 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:31:46,110 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:31:46,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1748198537] [2022-11-03 02:31:46,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1748198537] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:31:46,111 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:31:46,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:31:46,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648794871] [2022-11-03 02:31:46,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:31:46,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:31:46,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:31:46,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:31:46,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:31:46,118 INFO L87 Difference]: Start difference. First operand 77 states and 111 transitions. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:31:46,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:31:46,232 INFO L93 Difference]: Finished difference Result 154 states and 224 transitions. [2022-11-03 02:31:46,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:31:46,234 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2022-11-03 02:31:46,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:31:46,234 INFO L225 Difference]: With dead ends: 154 [2022-11-03 02:31:46,235 INFO L226 Difference]: Without dead ends: 81 [2022-11-03 02:31:46,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:31:46,236 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 2 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:31:46,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 496 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 27 Unchecked, 0.1s Time] [2022-11-03 02:31:46,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-11-03 02:31:46,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2022-11-03 02:31:46,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.45) internal successors, (116), 80 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:31:46,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 116 transitions. [2022-11-03 02:31:46,244 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 116 transitions. Word has length 76 [2022-11-03 02:31:46,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:31:46,244 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 116 transitions. [2022-11-03 02:31:46,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:31:46,245 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 116 transitions. [2022-11-03 02:31:46,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-03 02:31:46,247 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:31:46,247 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:31:46,276 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:31:46,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:31:46,467 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:31:46,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:31:46,468 INFO L85 PathProgramCache]: Analyzing trace with hash 428344259, now seen corresponding path program 1 times [2022-11-03 02:31:46,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:31:46,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1540633963] [2022-11-03 02:31:46,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:31:46,470 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:31:46,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:31:46,471 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:31:46,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 02:31:47,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:31:47,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 1010 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:31:47,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:31:47,366 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 02:31:47,367 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:31:47,367 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:31:47,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1540633963] [2022-11-03 02:31:47,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1540633963] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:31:47,371 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:31:47,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:31:47,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386552074] [2022-11-03 02:31:47,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:31:47,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:31:47,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:31:47,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:31:47,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:31:47,374 INFO L87 Difference]: Start difference. First operand 81 states and 116 transitions. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:31:47,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:31:47,600 INFO L93 Difference]: Finished difference Result 294 states and 429 transitions. [2022-11-03 02:31:47,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:31:47,601 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2022-11-03 02:31:47,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:31:47,602 INFO L225 Difference]: With dead ends: 294 [2022-11-03 02:31:47,602 INFO L226 Difference]: Without dead ends: 221 [2022-11-03 02:31:47,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:31:47,604 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 276 mSDsluCounter, 719 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 860 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:31:47,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [276 Valid, 860 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 42 Unchecked, 0.2s Time] [2022-11-03 02:31:47,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-11-03 02:31:47,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 107. [2022-11-03 02:31:47,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.4528301886792452) internal successors, (154), 106 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:31:47,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 154 transitions. [2022-11-03 02:31:47,617 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 154 transitions. Word has length 76 [2022-11-03 02:31:47,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:31:47,618 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 154 transitions. [2022-11-03 02:31:47,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:31:47,618 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 154 transitions. [2022-11-03 02:31:47,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-03 02:31:47,620 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:31:47,620 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:31:47,645 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:31:47,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:31:47,840 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:31:47,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:31:47,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1321830597, now seen corresponding path program 1 times [2022-11-03 02:31:47,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:31:47,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1669897857] [2022-11-03 02:31:47,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:31:47,843 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:31:47,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:31:47,844 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:31:47,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-03 02:31:48,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:31:48,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 1010 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:31:48,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:31:48,704 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 02:31:48,705 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:31:48,705 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:31:48,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1669897857] [2022-11-03 02:31:48,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1669897857] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:31:48,705 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:31:48,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:31:48,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019732352] [2022-11-03 02:31:48,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:31:48,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:31:48,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:31:48,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:31:48,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:31:48,708 INFO L87 Difference]: Start difference. First operand 107 states and 154 transitions. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:31:48,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:31:48,809 INFO L93 Difference]: Finished difference Result 218 states and 317 transitions. [2022-11-03 02:31:48,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:31:48,814 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2022-11-03 02:31:48,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:31:48,815 INFO L225 Difference]: With dead ends: 218 [2022-11-03 02:31:48,815 INFO L226 Difference]: Without dead ends: 145 [2022-11-03 02:31:48,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:31:48,816 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 51 mSDsluCounter, 487 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 588 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:31:48,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 588 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 24 Unchecked, 0.1s Time] [2022-11-03 02:31:48,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-11-03 02:31:48,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2022-11-03 02:31:48,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.4513888888888888) internal successors, (209), 144 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:31:48,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 209 transitions. [2022-11-03 02:31:48,825 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 209 transitions. Word has length 76 [2022-11-03 02:31:48,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:31:48,830 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 209 transitions. [2022-11-03 02:31:48,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:31:48,831 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 209 transitions. [2022-11-03 02:31:48,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-03 02:31:48,833 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:31:48,833 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:31:48,854 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-11-03 02:31:49,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:31:49,052 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:31:49,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:31:49,052 INFO L85 PathProgramCache]: Analyzing trace with hash 662299075, now seen corresponding path program 1 times [2022-11-03 02:31:49,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:31:49,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [24203617] [2022-11-03 02:31:49,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:31:49,055 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:31:49,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:31:49,056 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:31:49,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-03 02:31:49,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:31:49,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 1010 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:31:49,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:31:49,829 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:31:49,829 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:31:49,830 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:31:49,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [24203617] [2022-11-03 02:31:49,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [24203617] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:31:49,830 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:31:49,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:31:49,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766816492] [2022-11-03 02:31:49,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:31:49,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:31:49,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:31:49,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:31:49,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:31:49,833 INFO L87 Difference]: Start difference. First operand 145 states and 209 transitions. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:31:50,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:31:50,089 INFO L93 Difference]: Finished difference Result 340 states and 494 transitions. [2022-11-03 02:31:50,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:31:50,090 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2022-11-03 02:31:50,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:31:50,091 INFO L225 Difference]: With dead ends: 340 [2022-11-03 02:31:50,091 INFO L226 Difference]: Without dead ends: 267 [2022-11-03 02:31:50,092 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:31:50,092 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 256 mSDsluCounter, 748 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 907 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:31:50,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [256 Valid, 907 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 20 Unchecked, 0.2s Time] [2022-11-03 02:31:50,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-11-03 02:31:50,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 165. [2022-11-03 02:31:50,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.4451219512195121) internal successors, (237), 164 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:31:50,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 237 transitions. [2022-11-03 02:31:50,102 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 237 transitions. Word has length 76 [2022-11-03 02:31:50,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:31:50,102 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 237 transitions. [2022-11-03 02:31:50,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:31:50,103 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 237 transitions. [2022-11-03 02:31:50,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-03 02:31:50,104 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:31:50,104 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:31:50,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:31:50,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:31:50,325 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:31:50,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:31:50,325 INFO L85 PathProgramCache]: Analyzing trace with hash 589912517, now seen corresponding path program 1 times [2022-11-03 02:31:50,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:31:50,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [765859784] [2022-11-03 02:31:50,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:31:50,326 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:31:50,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:31:50,327 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:31:50,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-03 02:31:50,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:31:50,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 1010 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:31:50,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:31:51,137 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 02:31:51,137 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:31:51,137 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:31:51,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [765859784] [2022-11-03 02:31:51,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [765859784] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:31:51,138 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:31:51,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:31:51,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399408298] [2022-11-03 02:31:51,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:31:51,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:31:51,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:31:51,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:31:51,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:31:51,140 INFO L87 Difference]: Start difference. First operand 165 states and 237 transitions. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:31:51,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:31:51,374 INFO L93 Difference]: Finished difference Result 340 states and 493 transitions. [2022-11-03 02:31:51,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:31:51,375 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2022-11-03 02:31:51,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:31:51,376 INFO L225 Difference]: With dead ends: 340 [2022-11-03 02:31:51,376 INFO L226 Difference]: Without dead ends: 267 [2022-11-03 02:31:51,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:31:51,377 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 253 mSDsluCounter, 694 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 856 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:31:51,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 856 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 24 Unchecked, 0.2s Time] [2022-11-03 02:31:51,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-11-03 02:31:51,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 167. [2022-11-03 02:31:51,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.4397590361445782) internal successors, (239), 166 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:31:51,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 239 transitions. [2022-11-03 02:31:51,384 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 239 transitions. Word has length 76 [2022-11-03 02:31:51,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:31:51,385 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 239 transitions. [2022-11-03 02:31:51,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:31:51,385 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 239 transitions. [2022-11-03 02:31:51,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-03 02:31:51,387 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:31:51,387 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:31:51,413 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-03 02:31:51,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:31:51,606 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:31:51,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:31:51,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1291512391, now seen corresponding path program 1 times [2022-11-03 02:31:51,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:31:51,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2118758226] [2022-11-03 02:31:51,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:31:51,608 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:31:51,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:31:51,611 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:31:51,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-03 02:31:52,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:31:52,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 1010 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:31:52,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:31:52,388 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:31:52,389 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:31:52,389 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:31:52,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2118758226] [2022-11-03 02:31:52,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2118758226] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:31:52,389 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:31:52,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:31:52,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228786573] [2022-11-03 02:31:52,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:31:52,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:31:52,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:31:52,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:31:52,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:31:52,391 INFO L87 Difference]: Start difference. First operand 167 states and 239 transitions. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:31:52,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:31:52,596 INFO L93 Difference]: Finished difference Result 340 states and 492 transitions. [2022-11-03 02:31:52,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:31:52,597 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2022-11-03 02:31:52,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:31:52,598 INFO L225 Difference]: With dead ends: 340 [2022-11-03 02:31:52,598 INFO L226 Difference]: Without dead ends: 267 [2022-11-03 02:31:52,599 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:31:52,599 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 243 mSDsluCounter, 698 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 869 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:31:52,600 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 869 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 19 Unchecked, 0.2s Time] [2022-11-03 02:31:52,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-11-03 02:31:52,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 173. [2022-11-03 02:31:52,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.436046511627907) internal successors, (247), 172 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:31:52,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 247 transitions. [2022-11-03 02:31:52,606 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 247 transitions. Word has length 76 [2022-11-03 02:31:52,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:31:52,606 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 247 transitions. [2022-11-03 02:31:52,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:31:52,607 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 247 transitions. [2022-11-03 02:31:52,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-03 02:31:52,608 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:31:52,608 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:31:52,635 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2022-11-03 02:31:52,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:31:52,823 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:31:52,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:31:52,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1432061001, now seen corresponding path program 1 times [2022-11-03 02:31:52,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:31:52,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [847406431] [2022-11-03 02:31:52,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:31:52,824 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:31:52,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:31:52,825 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:31:52,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-03 02:31:53,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:31:53,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 1010 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:31:53,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:31:53,695 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 02:31:53,696 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:31:53,696 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:31:53,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [847406431] [2022-11-03 02:31:53,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [847406431] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:31:53,696 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:31:53,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:31:53,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83942934] [2022-11-03 02:31:53,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:31:53,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:31:53,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:31:53,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:31:53,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:31:53,699 INFO L87 Difference]: Start difference. First operand 173 states and 247 transitions. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:31:53,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:31:53,794 INFO L93 Difference]: Finished difference Result 338 states and 485 transitions. [2022-11-03 02:31:53,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:31:53,804 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2022-11-03 02:31:53,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:31:53,806 INFO L225 Difference]: With dead ends: 338 [2022-11-03 02:31:53,806 INFO L226 Difference]: Without dead ends: 265 [2022-11-03 02:31:53,807 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:31:53,808 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 79 mSDsluCounter, 497 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 599 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:31:53,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 599 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 17 Unchecked, 0.1s Time] [2022-11-03 02:31:53,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2022-11-03 02:31:53,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 265. [2022-11-03 02:31:53,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 1.428030303030303) internal successors, (377), 264 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:31:53,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 377 transitions. [2022-11-03 02:31:53,822 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 377 transitions. Word has length 76 [2022-11-03 02:31:53,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:31:53,822 INFO L495 AbstractCegarLoop]: Abstraction has 265 states and 377 transitions. [2022-11-03 02:31:53,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:31:53,822 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 377 transitions. [2022-11-03 02:31:53,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-03 02:31:53,823 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:31:53,824 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:31:53,852 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-03 02:31:54,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:31:54,052 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:31:54,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:31:54,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1057467961, now seen corresponding path program 1 times [2022-11-03 02:31:54,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:31:54,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1940167143] [2022-11-03 02:31:54,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:31:54,054 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:31:54,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:31:54,055 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:31:54,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-03 02:31:54,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:31:54,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 1010 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:31:54,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:31:55,019 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 02:31:55,019 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:31:55,020 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:31:55,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1940167143] [2022-11-03 02:31:55,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1940167143] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:31:55,020 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:31:55,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:31:55,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469927926] [2022-11-03 02:31:55,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:31:55,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:31:55,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:31:55,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:31:55,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:31:55,022 INFO L87 Difference]: Start difference. First operand 265 states and 377 transitions. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:31:55,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:31:55,140 INFO L93 Difference]: Finished difference Result 566 states and 811 transitions. [2022-11-03 02:31:55,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:31:55,141 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2022-11-03 02:31:55,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:31:55,143 INFO L225 Difference]: With dead ends: 566 [2022-11-03 02:31:55,143 INFO L226 Difference]: Without dead ends: 493 [2022-11-03 02:31:55,143 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:31:55,144 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 129 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:31:55,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 510 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 17 Unchecked, 0.1s Time] [2022-11-03 02:31:55,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2022-11-03 02:31:55,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 493. [2022-11-03 02:31:55,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 492 states have (on average 1.4288617886178863) internal successors, (703), 492 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:31:55,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 703 transitions. [2022-11-03 02:31:55,154 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 703 transitions. Word has length 76 [2022-11-03 02:31:55,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:31:55,154 INFO L495 AbstractCegarLoop]: Abstraction has 493 states and 703 transitions. [2022-11-03 02:31:55,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:31:55,155 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 703 transitions. [2022-11-03 02:31:55,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-03 02:31:55,156 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:31:55,156 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:31:55,175 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-03 02:31:55,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:31:55,370 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:31:55,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:31:55,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1059315003, now seen corresponding path program 1 times [2022-11-03 02:31:55,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:31:55,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [534833800] [2022-11-03 02:31:55,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:31:55,372 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:31:55,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:31:55,373 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:31:55,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-03 02:31:55,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:31:55,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 1010 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-03 02:31:55,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:31:57,107 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:31:57,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:32:01,784 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 02:32:01,784 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:32:01,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [534833800] [2022-11-03 02:32:01,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [534833800] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:32:01,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [918749449] [2022-11-03 02:32:01,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:32:01,785 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:32:01,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:32:01,790 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:32:01,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2022-11-03 02:32:02,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:32:02,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 1010 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-03 02:32:02,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:32:03,896 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:32:03,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:33:08,249 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 02:33:08,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [918749449] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:33:08,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354394280] [2022-11-03 02:33:08,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:33:08,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:33:08,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:33:08,256 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:33:08,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-03 02:33:08,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:33:08,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 1010 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-03 02:33:08,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:33:10,534 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 02:33:10,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:33:13,874 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 02:33:13,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354394280] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:33:13,874 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:33:13,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 9, 9] total 36 [2022-11-03 02:33:13,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077991073] [2022-11-03 02:33:13,875 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:33:13,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-03 02:33:13,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:33:13,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-03 02:33:13,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1051, Unknown=30, NotChecked=0, Total=1260 [2022-11-03 02:33:13,878 INFO L87 Difference]: Start difference. First operand 493 states and 703 transitions. Second operand has 36 states, 36 states have (on average 10.222222222222221) internal successors, (368), 36 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:33:14,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:33:14,957 INFO L93 Difference]: Finished difference Result 638 states and 909 transitions. [2022-11-03 02:33:14,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-03 02:33:14,961 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 10.222222222222221) internal successors, (368), 36 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2022-11-03 02:33:14,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:33:14,964 INFO L225 Difference]: With dead ends: 638 [2022-11-03 02:33:14,964 INFO L226 Difference]: Without dead ends: 636 [2022-11-03 02:33:14,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 416 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 71.4s TimeCoverageRelationStatistics Valid=345, Invalid=1695, Unknown=30, NotChecked=0, Total=2070 [2022-11-03 02:33:14,968 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 1108 mSDsluCounter, 1896 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1108 SdHoareTripleChecker+Valid, 1979 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:33:14,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1108 Valid, 1979 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 67 Unchecked, 0.0s Time] [2022-11-03 02:33:14,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2022-11-03 02:33:14,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 634. [2022-11-03 02:33:14,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 634 states, 633 states have (on average 1.429699842022117) internal successors, (905), 633 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:33:14,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 905 transitions. [2022-11-03 02:33:14,987 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 905 transitions. Word has length 76 [2022-11-03 02:33:14,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:33:14,987 INFO L495 AbstractCegarLoop]: Abstraction has 634 states and 905 transitions. [2022-11-03 02:33:14,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 10.222222222222221) internal successors, (368), 36 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:33:14,988 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 905 transitions. [2022-11-03 02:33:14,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-03 02:33:14,990 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:33:14,990 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:33:15,010 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-03 02:33:15,216 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2022-11-03 02:33:15,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-03 02:33:15,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:33:15,610 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:33:15,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:33:15,611 INFO L85 PathProgramCache]: Analyzing trace with hash -2085963319, now seen corresponding path program 1 times [2022-11-03 02:33:15,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:33:15,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1435042350] [2022-11-03 02:33:15,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:33:15,612 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:33:15,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:33:15,613 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:33:15,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-03 02:33:16,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:33:16,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 1010 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:33:16,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:33:16,166 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:33:16,166 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:33:16,166 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:33:16,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1435042350] [2022-11-03 02:33:16,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1435042350] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:33:16,167 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:33:16,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:33:16,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604655625] [2022-11-03 02:33:16,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:33:16,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:33:16,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:33:16,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:33:16,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:33:16,169 INFO L87 Difference]: Start difference. First operand 634 states and 905 transitions. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:33:16,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:33:16,386 INFO L93 Difference]: Finished difference Result 1413 states and 2012 transitions. [2022-11-03 02:33:16,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:33:16,388 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2022-11-03 02:33:16,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:33:16,391 INFO L225 Difference]: With dead ends: 1413 [2022-11-03 02:33:16,391 INFO L226 Difference]: Without dead ends: 1104 [2022-11-03 02:33:16,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:33:16,393 INFO L413 NwaCegarLoop]: 279 mSDtfsCounter, 286 mSDsluCounter, 666 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 945 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:33:16,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [286 Valid, 945 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 29 Unchecked, 0.2s Time] [2022-11-03 02:33:16,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1104 states. [2022-11-03 02:33:16,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1104 to 634. [2022-11-03 02:33:16,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 634 states, 633 states have (on average 1.4265402843601895) internal successors, (903), 633 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:33:16,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 903 transitions. [2022-11-03 02:33:16,411 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 903 transitions. Word has length 76 [2022-11-03 02:33:16,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:33:16,412 INFO L495 AbstractCegarLoop]: Abstraction has 634 states and 903 transitions. [2022-11-03 02:33:16,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:33:16,412 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 903 transitions. [2022-11-03 02:33:16,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-03 02:33:16,414 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:33:16,414 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:33:16,438 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2022-11-03 02:33:16,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:33:16,633 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:33:16,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:33:16,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1525263541, now seen corresponding path program 1 times [2022-11-03 02:33:16,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:33:16,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [703640452] [2022-11-03 02:33:16,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:33:16,635 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:33:16,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:33:16,636 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:33:16,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-03 02:33:17,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:33:17,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 1010 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:33:17,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:33:17,254 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 02:33:17,254 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:33:17,254 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:33:17,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [703640452] [2022-11-03 02:33:17,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [703640452] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:33:17,254 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:33:17,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:33:17,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736510331] [2022-11-03 02:33:17,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:33:17,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:33:17,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:33:17,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:33:17,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:33:17,256 INFO L87 Difference]: Start difference. First operand 634 states and 903 transitions. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:33:17,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:33:17,411 INFO L93 Difference]: Finished difference Result 1228 states and 1740 transitions. [2022-11-03 02:33:17,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:33:17,413 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2022-11-03 02:33:17,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:33:17,416 INFO L225 Difference]: With dead ends: 1228 [2022-11-03 02:33:17,416 INFO L226 Difference]: Without dead ends: 963 [2022-11-03 02:33:17,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:33:17,418 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 154 mSDsluCounter, 554 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 770 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:33:17,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 770 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 16 Unchecked, 0.1s Time] [2022-11-03 02:33:17,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2022-11-03 02:33:17,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 638. [2022-11-03 02:33:17,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 638 states, 637 states have (on average 1.414442700156986) internal successors, (901), 637 states have internal predecessors, (901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:33:17,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 901 transitions. [2022-11-03 02:33:17,434 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 901 transitions. Word has length 76 [2022-11-03 02:33:17,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:33:17,435 INFO L495 AbstractCegarLoop]: Abstraction has 638 states and 901 transitions. [2022-11-03 02:33:17,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:33:17,435 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 901 transitions. [2022-11-03 02:33:17,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-03 02:33:17,437 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:33:17,437 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:33:17,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-03 02:33:17,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:33:17,653 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:33:17,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:33:17,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1540782259, now seen corresponding path program 1 times [2022-11-03 02:33:17,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:33:17,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [842325006] [2022-11-03 02:33:17,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:33:17,654 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:33:17,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:33:17,655 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:33:17,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-03 02:33:18,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:33:18,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 1010 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:33:18,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:33:18,348 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 02:33:18,349 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:33:18,349 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:33:18,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [842325006] [2022-11-03 02:33:18,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [842325006] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:33:18,349 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:33:18,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:33:18,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153922764] [2022-11-03 02:33:18,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:33:18,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:33:18,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:33:18,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:33:18,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:33:18,351 INFO L87 Difference]: Start difference. First operand 638 states and 901 transitions. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:33:18,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:33:18,517 INFO L93 Difference]: Finished difference Result 924 states and 1301 transitions. [2022-11-03 02:33:18,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:33:18,518 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2022-11-03 02:33:18,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:33:18,522 INFO L225 Difference]: With dead ends: 924 [2022-11-03 02:33:18,522 INFO L226 Difference]: Without dead ends: 813 [2022-11-03 02:33:18,523 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:33:18,524 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 163 mSDsluCounter, 707 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 920 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:33:18,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 920 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 35 Unchecked, 0.1s Time] [2022-11-03 02:33:18,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 813 states. [2022-11-03 02:33:18,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 813 to 690. [2022-11-03 02:33:18,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 690 states, 689 states have (on average 1.4034833091436865) internal successors, (967), 689 states have internal predecessors, (967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:33:18,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 967 transitions. [2022-11-03 02:33:18,542 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 967 transitions. Word has length 76 [2022-11-03 02:33:18,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:33:18,542 INFO L495 AbstractCegarLoop]: Abstraction has 690 states and 967 transitions. [2022-11-03 02:33:18,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:33:18,543 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 967 transitions. [2022-11-03 02:33:18,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-03 02:33:18,545 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:33:18,545 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:33:18,564 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2022-11-03 02:33:18,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:33:18,758 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:33:18,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:33:18,759 INFO L85 PathProgramCache]: Analyzing trace with hash 382445775, now seen corresponding path program 1 times [2022-11-03 02:33:18,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:33:18,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [526458764] [2022-11-03 02:33:18,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:33:18,760 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:33:18,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:33:18,762 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:33:18,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-03 02:33:19,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:33:19,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 1010 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:33:19,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:33:19,422 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 02:33:19,422 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:33:19,423 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:33:19,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [526458764] [2022-11-03 02:33:19,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [526458764] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:33:19,423 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:33:19,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:33:19,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153103636] [2022-11-03 02:33:19,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:33:19,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:33:19,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:33:19,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:33:19,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:33:19,424 INFO L87 Difference]: Start difference. First operand 690 states and 967 transitions. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:33:19,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:33:19,672 INFO L93 Difference]: Finished difference Result 857 states and 1204 transitions. [2022-11-03 02:33:19,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:33:19,675 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2022-11-03 02:33:19,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:33:19,678 INFO L225 Difference]: With dead ends: 857 [2022-11-03 02:33:19,678 INFO L226 Difference]: Without dead ends: 774 [2022-11-03 02:33:19,679 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:33:19,680 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 130 mSDsluCounter, 702 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 913 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:33:19,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 913 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 25 Unchecked, 0.2s Time] [2022-11-03 02:33:19,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2022-11-03 02:33:19,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 710. [2022-11-03 02:33:19,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 710 states, 709 states have (on average 1.3991537376586742) internal successors, (992), 709 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:33:19,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 710 states to 710 states and 992 transitions. [2022-11-03 02:33:19,698 INFO L78 Accepts]: Start accepts. Automaton has 710 states and 992 transitions. Word has length 76 [2022-11-03 02:33:19,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:33:19,698 INFO L495 AbstractCegarLoop]: Abstraction has 710 states and 992 transitions. [2022-11-03 02:33:19,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:33:19,699 INFO L276 IsEmpty]: Start isEmpty. Operand 710 states and 992 transitions. [2022-11-03 02:33:19,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-03 02:33:19,701 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:33:19,701 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:33:19,724 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-03 02:33:19,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:33:19,914 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:33:19,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:33:19,915 INFO L85 PathProgramCache]: Analyzing trace with hash -897417903, now seen corresponding path program 1 times [2022-11-03 02:33:19,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:33:19,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1510339551] [2022-11-03 02:33:19,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:33:19,916 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:33:19,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:33:19,917 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:33:19,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-03 02:33:20,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:33:20,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 1010 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:33:20,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:33:20,590 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 02:33:20,590 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:33:20,590 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:33:20,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1510339551] [2022-11-03 02:33:20,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1510339551] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:33:20,590 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:33:20,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:33:20,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613292287] [2022-11-03 02:33:20,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:33:20,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:33:20,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:33:20,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:33:20,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:33:20,595 INFO L87 Difference]: Start difference. First operand 710 states and 992 transitions. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:33:20,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:33:20,837 INFO L93 Difference]: Finished difference Result 824 states and 1153 transitions. [2022-11-03 02:33:20,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:33:20,838 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2022-11-03 02:33:20,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:33:20,841 INFO L225 Difference]: With dead ends: 824 [2022-11-03 02:33:20,841 INFO L226 Difference]: Without dead ends: 749 [2022-11-03 02:33:20,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:33:20,845 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 145 mSDsluCounter, 576 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 773 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:33:20,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 773 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 21 Unchecked, 0.2s Time] [2022-11-03 02:33:20,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2022-11-03 02:33:20,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 718. [2022-11-03 02:33:20,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 718 states, 717 states have (on average 1.397489539748954) internal successors, (1002), 717 states have internal predecessors, (1002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:33:20,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 1002 transitions. [2022-11-03 02:33:20,862 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 1002 transitions. Word has length 76 [2022-11-03 02:33:20,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:33:20,862 INFO L495 AbstractCegarLoop]: Abstraction has 718 states and 1002 transitions. [2022-11-03 02:33:20,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:33:20,863 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 1002 transitions. [2022-11-03 02:33:20,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-03 02:33:20,864 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:33:20,865 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:33:20,886 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2022-11-03 02:33:21,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:33:21,085 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:33:21,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:33:21,085 INFO L85 PathProgramCache]: Analyzing trace with hash 877589459, now seen corresponding path program 1 times [2022-11-03 02:33:21,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:33:21,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [389740724] [2022-11-03 02:33:21,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:33:21,086 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:33:21,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:33:21,087 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:33:21,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-03 02:33:21,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:33:21,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 1010 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-03 02:33:21,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:33:22,642 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:33:22,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:33:26,588 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 02:33:26,589 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:33:26,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [389740724] [2022-11-03 02:33:26,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [389740724] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:33:26,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1993417589] [2022-11-03 02:33:26,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:33:26,590 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:33:26,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:33:26,591 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:33:26,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2022-11-03 02:33:27,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:33:27,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 1010 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-03 02:33:27,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:33:28,403 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:33:28,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:34:23,180 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 02:34:23,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1993417589] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:34:23,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891652481] [2022-11-03 02:34:23,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:34:23,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:34:23,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:34:23,186 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:34:23,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-03 02:34:23,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:34:23,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 1010 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-03 02:34:23,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:34:25,643 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 02:34:25,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:34:28,773 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 02:34:28,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891652481] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:34:28,773 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:34:28,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 9, 9] total 36 [2022-11-03 02:34:28,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661268746] [2022-11-03 02:34:28,774 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:34:28,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-03 02:34:28,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:34:28,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-03 02:34:28,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1055, Unknown=26, NotChecked=0, Total=1260 [2022-11-03 02:34:28,777 INFO L87 Difference]: Start difference. First operand 718 states and 1002 transitions. Second operand has 36 states, 36 states have (on average 10.222222222222221) internal successors, (368), 36 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:34:29,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:34:29,985 INFO L93 Difference]: Finished difference Result 1369 states and 1906 transitions. [2022-11-03 02:34:29,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-03 02:34:29,987 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 10.222222222222221) internal successors, (368), 36 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2022-11-03 02:34:29,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:34:29,993 INFO L225 Difference]: With dead ends: 1369 [2022-11-03 02:34:29,993 INFO L226 Difference]: Without dead ends: 1367 [2022-11-03 02:34:29,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 464 GetRequests, 418 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 60.7s TimeCoverageRelationStatistics Valid=345, Invalid=1699, Unknown=26, NotChecked=0, Total=2070 [2022-11-03 02:34:29,995 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 628 mSDsluCounter, 2181 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 628 SdHoareTripleChecker+Valid, 2267 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:34:29,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [628 Valid, 2267 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 43 Unchecked, 0.0s Time] [2022-11-03 02:34:29,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1367 states. [2022-11-03 02:34:30,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1367 to 1330. [2022-11-03 02:34:30,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1330 states, 1329 states have (on average 1.3927765237020315) internal successors, (1851), 1329 states have internal predecessors, (1851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:34:30,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1330 states to 1330 states and 1851 transitions. [2022-11-03 02:34:30,028 INFO L78 Accepts]: Start accepts. Automaton has 1330 states and 1851 transitions. Word has length 76 [2022-11-03 02:34:30,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:34:30,029 INFO L495 AbstractCegarLoop]: Abstraction has 1330 states and 1851 transitions. [2022-11-03 02:34:30,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 10.222222222222221) internal successors, (368), 36 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:34:30,029 INFO L276 IsEmpty]: Start isEmpty. Operand 1330 states and 1851 transitions. [2022-11-03 02:34:30,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-03 02:34:30,032 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:34:30,032 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:34:30,058 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-03 02:34:30,259 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2022-11-03 02:34:30,480 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-03 02:34:30,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:34:30,653 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:34:30,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:34:30,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1557647829, now seen corresponding path program 1 times [2022-11-03 02:34:30,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:34:30,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1940948425] [2022-11-03 02:34:30,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:34:30,655 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:34:30,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:34:30,656 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:34:30,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-03 02:34:31,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:34:31,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 1010 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-03 02:34:31,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:34:32,390 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:34:32,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:34:37,447 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 02:34:37,447 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:34:37,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1940948425] [2022-11-03 02:34:37,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1940948425] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:34:37,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [159695175] [2022-11-03 02:34:37,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:34:37,448 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:34:37,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:34:37,448 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:34:37,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2022-11-03 02:34:38,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:34:38,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 1010 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-03 02:34:38,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:34:39,270 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:34:39,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:35:43,642 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 02:35:43,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [159695175] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:35:43,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408626053] [2022-11-03 02:35:43,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:43,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:35:43,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:35:43,645 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:35:43,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-03 02:35:44,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:44,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 1010 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-03 02:35:44,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:45,836 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 02:35:45,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:35:49,161 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 02:35:49,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408626053] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:35:49,161 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:35:49,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 9, 9] total 36 [2022-11-03 02:35:49,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359661315] [2022-11-03 02:35:49,162 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:35:49,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-03 02:35:49,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:35:49,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-03 02:35:49,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1051, Unknown=30, NotChecked=0, Total=1260 [2022-11-03 02:35:49,164 INFO L87 Difference]: Start difference. First operand 1330 states and 1851 transitions. Second operand has 36 states, 36 states have (on average 10.222222222222221) internal successors, (368), 36 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:50,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:50,310 INFO L93 Difference]: Finished difference Result 2038 states and 2841 transitions. [2022-11-03 02:35:50,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-03 02:35:50,311 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 10.222222222222221) internal successors, (368), 36 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2022-11-03 02:35:50,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:50,317 INFO L225 Difference]: With dead ends: 2038 [2022-11-03 02:35:50,318 INFO L226 Difference]: Without dead ends: 2036 [2022-11-03 02:35:50,319 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 464 GetRequests, 418 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 71.6s TimeCoverageRelationStatistics Valid=345, Invalid=1695, Unknown=30, NotChecked=0, Total=2070 [2022-11-03 02:35:50,320 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 1245 mSDsluCounter, 1779 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1245 SdHoareTripleChecker+Valid, 1863 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:50,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1245 Valid, 1863 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 60 Unchecked, 0.0s Time] [2022-11-03 02:35:50,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2036 states. [2022-11-03 02:35:50,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2036 to 1990. [2022-11-03 02:35:50,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1990 states, 1989 states have (on average 1.3951734539969833) internal successors, (2775), 1989 states have internal predecessors, (2775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:50,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1990 states to 1990 states and 2775 transitions. [2022-11-03 02:35:50,363 INFO L78 Accepts]: Start accepts. Automaton has 1990 states and 2775 transitions. Word has length 76 [2022-11-03 02:35:50,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:50,363 INFO L495 AbstractCegarLoop]: Abstraction has 1990 states and 2775 transitions. [2022-11-03 02:35:50,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 10.222222222222221) internal successors, (368), 36 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:50,364 INFO L276 IsEmpty]: Start isEmpty. Operand 1990 states and 2775 transitions. [2022-11-03 02:35:50,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-03 02:35:50,367 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:50,368 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:35:50,392 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-03 02:35:50,588 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2022-11-03 02:35:50,807 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-03 02:35:50,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:35:50,983 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:50,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:50,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1981294551, now seen corresponding path program 1 times [2022-11-03 02:35:50,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:35:50,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [187640717] [2022-11-03 02:35:50,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:50,984 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:35:50,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:35:50,985 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:35:50,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-03 02:35:51,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:51,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 1010 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:35:51,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:51,612 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 02:35:51,612 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:35:51,612 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:35:51,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [187640717] [2022-11-03 02:35:51,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [187640717] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:51,613 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:35:51,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:35:51,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949223712] [2022-11-03 02:35:51,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:51,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:35:51,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:35:51,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:35:51,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:35:51,615 INFO L87 Difference]: Start difference. First operand 1990 states and 2775 transitions. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:51,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:51,837 INFO L93 Difference]: Finished difference Result 3374 states and 4735 transitions. [2022-11-03 02:35:51,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:35:51,839 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2022-11-03 02:35:51,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:51,847 INFO L225 Difference]: With dead ends: 3374 [2022-11-03 02:35:51,847 INFO L226 Difference]: Without dead ends: 2996 [2022-11-03 02:35:51,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:35:51,849 INFO L413 NwaCegarLoop]: 229 mSDtfsCounter, 190 mSDsluCounter, 919 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 1148 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:51,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 1148 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 20 Unchecked, 0.2s Time] [2022-11-03 02:35:51,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2996 states. [2022-11-03 02:35:51,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2996 to 2278. [2022-11-03 02:35:51,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2278 states, 2277 states have (on average 1.3873517786561265) internal successors, (3159), 2277 states have internal predecessors, (3159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:51,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2278 states to 2278 states and 3159 transitions. [2022-11-03 02:35:51,900 INFO L78 Accepts]: Start accepts. Automaton has 2278 states and 3159 transitions. Word has length 76 [2022-11-03 02:35:51,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:51,901 INFO L495 AbstractCegarLoop]: Abstraction has 2278 states and 3159 transitions. [2022-11-03 02:35:51,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:51,901 INFO L276 IsEmpty]: Start isEmpty. Operand 2278 states and 3159 transitions. [2022-11-03 02:35:51,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-03 02:35:51,905 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:51,905 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:35:51,934 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-11-03 02:35:52,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:35:52,118 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:52,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:52,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1890970919, now seen corresponding path program 1 times [2022-11-03 02:35:52,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:35:52,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1809999921] [2022-11-03 02:35:52,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:52,120 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:35:52,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:35:52,121 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:35:52,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-03 02:35:52,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:52,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 1010 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-03 02:35:52,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:53,851 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:35:53,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:36:01,896 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 02:36:01,897 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:36:01,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1809999921] [2022-11-03 02:36:01,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1809999921] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:36:01,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1000707490] [2022-11-03 02:36:01,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:01,897 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:36:01,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:36:01,898 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:36:01,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2022-11-03 02:36:02,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:02,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 1010 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-03 02:36:02,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:03,753 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:36:03,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:37:13,398 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 02:37:13,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1000707490] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:37:13,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299612487] [2022-11-03 02:37:13,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:37:13,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:37:13,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:37:13,401 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:37:13,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-03 02:37:13,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:37:13,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 1010 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-03 02:37:13,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:37:15,643 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 02:37:15,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:37:18,991 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 02:37:18,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299612487] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:37:18,992 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:37:18,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 9, 9] total 42 [2022-11-03 02:37:18,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296296654] [2022-11-03 02:37:18,992 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:37:18,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-03 02:37:18,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:37:18,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-03 02:37:18,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=1438, Unknown=32, NotChecked=0, Total=1722 [2022-11-03 02:37:18,995 INFO L87 Difference]: Start difference. First operand 2278 states and 3159 transitions. Second operand has 42 states, 42 states have (on average 8.761904761904763) internal successors, (368), 42 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:37:20,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:37:20,569 INFO L93 Difference]: Finished difference Result 2658 states and 3703 transitions. [2022-11-03 02:37:20,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-03 02:37:20,570 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 8.761904761904763) internal successors, (368), 42 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2022-11-03 02:37:20,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:37:20,573 INFO L225 Difference]: With dead ends: 2658 [2022-11-03 02:37:20,574 INFO L226 Difference]: Without dead ends: 2656 [2022-11-03 02:37:20,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 466 GetRequests, 412 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 80.5s TimeCoverageRelationStatistics Valid=484, Invalid=2346, Unknown=32, NotChecked=0, Total=2862 [2022-11-03 02:37:20,575 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 743 mSDsluCounter, 2300 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 743 SdHoareTripleChecker+Valid, 2435 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:37:20,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [743 Valid, 2435 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 132 Unchecked, 0.0s Time] [2022-11-03 02:37:20,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2656 states. [2022-11-03 02:37:20,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2656 to 2626. [2022-11-03 02:37:20,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2626 states, 2625 states have (on average 1.3946666666666667) internal successors, (3661), 2625 states have internal predecessors, (3661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:37:20,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2626 states to 2626 states and 3661 transitions. [2022-11-03 02:37:20,632 INFO L78 Accepts]: Start accepts. Automaton has 2626 states and 3661 transitions. Word has length 76 [2022-11-03 02:37:20,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:37:20,633 INFO L495 AbstractCegarLoop]: Abstraction has 2626 states and 3661 transitions. [2022-11-03 02:37:20,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 8.761904761904763) internal successors, (368), 42 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:37:20,633 INFO L276 IsEmpty]: Start isEmpty. Operand 2626 states and 3661 transitions. [2022-11-03 02:37:20,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-03 02:37:20,637 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:37:20,637 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:37:20,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2022-11-03 02:37:20,857 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2022-11-03 02:37:21,069 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-03 02:37:21,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:37:21,246 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:37:21,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:37:21,246 INFO L85 PathProgramCache]: Analyzing trace with hash -304648103, now seen corresponding path program 1 times [2022-11-03 02:37:21,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:37:21,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [872406124] [2022-11-03 02:37:21,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:37:21,247 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:37:21,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:37:21,248 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:37:21,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-03 02:37:21,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:37:21,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 1010 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:37:21,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:37:21,868 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 02:37:21,869 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:37:21,869 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:37:21,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [872406124] [2022-11-03 02:37:21,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [872406124] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:37:21,869 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:37:21,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:37:21,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530636089] [2022-11-03 02:37:21,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:37:21,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:37:21,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:37:21,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:37:21,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:37:21,871 INFO L87 Difference]: Start difference. First operand 2626 states and 3661 transitions. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:37:22,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:37:22,050 INFO L93 Difference]: Finished difference Result 4928 states and 6840 transitions. [2022-11-03 02:37:22,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:37:22,055 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2022-11-03 02:37:22,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:37:22,065 INFO L225 Difference]: With dead ends: 4928 [2022-11-03 02:37:22,066 INFO L226 Difference]: Without dead ends: 4064 [2022-11-03 02:37:22,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:37:22,068 INFO L413 NwaCegarLoop]: 256 mSDtfsCounter, 256 mSDsluCounter, 679 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 935 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:37:22,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [256 Valid, 935 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 14 Unchecked, 0.1s Time] [2022-11-03 02:37:22,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4064 states. [2022-11-03 02:37:22,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4064 to 2626. [2022-11-03 02:37:22,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2626 states, 2625 states have (on average 1.3824761904761904) internal successors, (3629), 2625 states have internal predecessors, (3629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:37:22,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2626 states to 2626 states and 3629 transitions. [2022-11-03 02:37:22,134 INFO L78 Accepts]: Start accepts. Automaton has 2626 states and 3629 transitions. Word has length 76 [2022-11-03 02:37:22,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:37:22,134 INFO L495 AbstractCegarLoop]: Abstraction has 2626 states and 3629 transitions. [2022-11-03 02:37:22,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:37:22,134 INFO L276 IsEmpty]: Start isEmpty. Operand 2626 states and 3629 transitions. [2022-11-03 02:37:22,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-03 02:37:22,138 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:37:22,138 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:37:22,158 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2022-11-03 02:37:22,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:37:22,358 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:37:22,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:37:22,358 INFO L85 PathProgramCache]: Analyzing trace with hash 2144952027, now seen corresponding path program 1 times [2022-11-03 02:37:22,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:37:22,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [914233622] [2022-11-03 02:37:22,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:37:22,359 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:37:22,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:37:22,360 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:37:22,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-11-03 02:37:22,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:37:22,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 1010 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-03 02:37:22,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:37:24,135 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:37:24,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:37:41,344 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 02:37:41,344 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:37:41,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [914233622] [2022-11-03 02:37:41,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [914233622] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:37:41,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1505848927] [2022-11-03 02:37:41,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:37:41,345 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:37:41,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:37:41,347 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:37:41,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2022-11-03 02:37:42,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:37:42,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 1010 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-03 02:37:42,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:37:43,175 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:37:43,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:38:49,658 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 02:38:49,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1505848927] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:38:49,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713246428] [2022-11-03 02:38:49,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:38:49,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:38:49,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:38:49,660 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:38:49,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-03 02:38:50,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:38:50,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 1010 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-03 02:38:50,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:38:51,958 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 02:38:51,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:38:55,194 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 02:38:55,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713246428] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:38:55,194 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:38:55,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14, 14, 9, 9] total 46 [2022-11-03 02:38:55,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297113048] [2022-11-03 02:38:55,195 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:38:55,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-03 02:38:55,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:38:55,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-03 02:38:55,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=1732, Unknown=34, NotChecked=0, Total=2070 [2022-11-03 02:38:55,197 INFO L87 Difference]: Start difference. First operand 2626 states and 3629 transitions. Second operand has 46 states, 46 states have (on average 7.543478260869565) internal successors, (347), 46 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:38:57,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:38:57,575 INFO L93 Difference]: Finished difference Result 2973 states and 4118 transitions. [2022-11-03 02:38:57,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-03 02:38:57,576 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 7.543478260869565) internal successors, (347), 46 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2022-11-03 02:38:57,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:38:57,583 INFO L225 Difference]: With dead ends: 2973 [2022-11-03 02:38:57,584 INFO L226 Difference]: Without dead ends: 2971 [2022-11-03 02:38:57,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 410 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1117 ImplicationChecksByTransitivity, 87.2s TimeCoverageRelationStatistics Valid=660, Invalid=3212, Unknown=34, NotChecked=0, Total=3906 [2022-11-03 02:38:57,586 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 794 mSDsluCounter, 3675 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 794 SdHoareTripleChecker+Valid, 3874 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 518 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:38:57,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [794 Valid, 3874 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 518 Unchecked, 0.0s Time] [2022-11-03 02:38:57,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2971 states. [2022-11-03 02:38:57,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2971 to 2938. [2022-11-03 02:38:57,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2938 states, 2937 states have (on average 1.3878106911814776) internal successors, (4076), 2937 states have internal predecessors, (4076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:38:57,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 4076 transitions. [2022-11-03 02:38:57,654 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 4076 transitions. Word has length 76 [2022-11-03 02:38:57,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:38:57,654 INFO L495 AbstractCegarLoop]: Abstraction has 2938 states and 4076 transitions. [2022-11-03 02:38:57,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 7.543478260869565) internal successors, (347), 46 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:38:57,655 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 4076 transitions. [2022-11-03 02:38:57,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-03 02:38:57,659 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:38:57,659 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:38:57,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-11-03 02:38:57,905 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2022-11-03 02:38:58,117 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-11-03 02:38:58,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:38:58,293 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:38:58,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:38:58,294 INFO L85 PathProgramCache]: Analyzing trace with hash 196110169, now seen corresponding path program 1 times [2022-11-03 02:38:58,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:38:58,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [811926800] [2022-11-03 02:38:58,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:38:58,295 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:38:58,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:38:58,296 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:38:58,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-11-03 02:38:58,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:38:58,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 1010 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:38:58,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:38:58,855 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:38:58,855 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:38:58,855 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:38:58,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [811926800] [2022-11-03 02:38:58,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [811926800] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:38:58,855 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:38:58,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:38:58,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474587089] [2022-11-03 02:38:58,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:38:58,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:38:58,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:38:58,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:38:58,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:38:58,857 INFO L87 Difference]: Start difference. First operand 2938 states and 4076 transitions. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:38:58,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:38:58,995 INFO L93 Difference]: Finished difference Result 5626 states and 7799 transitions. [2022-11-03 02:38:58,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:38:58,997 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2022-11-03 02:38:58,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:38:59,009 INFO L225 Difference]: With dead ends: 5626 [2022-11-03 02:38:59,009 INFO L226 Difference]: Without dead ends: 4672 [2022-11-03 02:38:59,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:38:59,012 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 143 mSDsluCounter, 562 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 765 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:38:59,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 765 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 11 Unchecked, 0.1s Time] [2022-11-03 02:38:59,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4672 states. [2022-11-03 02:38:59,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4672 to 2938. [2022-11-03 02:38:59,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2938 states, 2937 states have (on average 1.3823629553966632) internal successors, (4060), 2937 states have internal predecessors, (4060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:38:59,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 4060 transitions. [2022-11-03 02:38:59,085 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 4060 transitions. Word has length 76 [2022-11-03 02:38:59,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:38:59,086 INFO L495 AbstractCegarLoop]: Abstraction has 2938 states and 4060 transitions. [2022-11-03 02:38:59,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:38:59,086 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 4060 transitions. [2022-11-03 02:38:59,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-03 02:38:59,090 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:38:59,090 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:38:59,115 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-11-03 02:38:59,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:38:59,306 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:38:59,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:38:59,307 INFO L85 PathProgramCache]: Analyzing trace with hash -701283109, now seen corresponding path program 1 times [2022-11-03 02:38:59,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:38:59,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [478886186] [2022-11-03 02:38:59,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:38:59,308 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:38:59,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:38:59,309 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:38:59,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-11-03 02:38:59,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:38:59,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 1010 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:38:59,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:38:59,972 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 02:38:59,972 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:38:59,972 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:38:59,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [478886186] [2022-11-03 02:38:59,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [478886186] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:38:59,973 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:38:59,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:38:59,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979927105] [2022-11-03 02:38:59,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:38:59,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:38:59,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:38:59,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:38:59,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:38:59,974 INFO L87 Difference]: Start difference. First operand 2938 states and 4060 transitions. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:00,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:39:00,174 INFO L93 Difference]: Finished difference Result 4068 states and 5666 transitions. [2022-11-03 02:39:00,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:39:00,175 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2022-11-03 02:39:00,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:39:00,184 INFO L225 Difference]: With dead ends: 4068 [2022-11-03 02:39:00,184 INFO L226 Difference]: Without dead ends: 3714 [2022-11-03 02:39:00,185 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:39:00,186 INFO L413 NwaCegarLoop]: 219 mSDtfsCounter, 196 mSDsluCounter, 747 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 966 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:39:00,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 966 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 27 Unchecked, 0.1s Time] [2022-11-03 02:39:00,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3714 states. [2022-11-03 02:39:00,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3714 to 2978. [2022-11-03 02:39:00,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2978 states, 2977 states have (on average 1.381256298286866) internal successors, (4112), 2977 states have internal predecessors, (4112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:00,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2978 states to 2978 states and 4112 transitions. [2022-11-03 02:39:00,277 INFO L78 Accepts]: Start accepts. Automaton has 2978 states and 4112 transitions. Word has length 76 [2022-11-03 02:39:00,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:39:00,277 INFO L495 AbstractCegarLoop]: Abstraction has 2978 states and 4112 transitions. [2022-11-03 02:39:00,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:00,278 INFO L276 IsEmpty]: Start isEmpty. Operand 2978 states and 4112 transitions. [2022-11-03 02:39:00,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-03 02:39:00,282 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:39:00,283 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:39:00,307 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-11-03 02:39:00,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:39:00,498 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:39:00,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:39:00,499 INFO L85 PathProgramCache]: Analyzing trace with hash 2005336285, now seen corresponding path program 1 times [2022-11-03 02:39:00,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:39:00,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [260093854] [2022-11-03 02:39:00,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:00,500 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:39:00,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:39:00,500 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:39:00,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-11-03 02:39:00,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:00,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 1010 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-03 02:39:00,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:39:01,884 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:39:01,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:39:14,916 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 02:39:14,916 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:39:14,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [260093854] [2022-11-03 02:39:14,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [260093854] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:39:14,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [102559635] [2022-11-03 02:39:14,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:14,917 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:39:14,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:39:14,918 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:39:14,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2022-11-03 02:39:15,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:15,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 1010 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-03 02:39:15,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:39:16,864 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:39:16,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:40:19,217 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 02:40:19,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [102559635] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:40:19,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202781889] [2022-11-03 02:40:19,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:40:19,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:40:19,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:40:19,228 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:40:19,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-11-03 02:40:19,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:40:19,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 1010 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-03 02:40:19,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:40:22,066 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 02:40:22,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:40:26,293 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 02:40:26,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202781889] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:40:26,294 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:40:26,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 9, 9] total 36 [2022-11-03 02:40:26,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747699664] [2022-11-03 02:40:26,294 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:40:26,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-03 02:40:26,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:40:26,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-03 02:40:26,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1053, Unknown=28, NotChecked=0, Total=1260 [2022-11-03 02:40:26,296 INFO L87 Difference]: Start difference. First operand 2978 states and 4112 transitions. Second operand has 36 states, 36 states have (on average 10.222222222222221) internal successors, (368), 36 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:40:27,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:40:27,743 INFO L93 Difference]: Finished difference Result 4092 states and 5681 transitions. [2022-11-03 02:40:27,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-03 02:40:27,743 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 10.222222222222221) internal successors, (368), 36 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2022-11-03 02:40:27,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:40:27,750 INFO L225 Difference]: With dead ends: 4092 [2022-11-03 02:40:27,750 INFO L226 Difference]: Without dead ends: 4090 [2022-11-03 02:40:27,751 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 464 GetRequests, 418 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 78.5s TimeCoverageRelationStatistics Valid=345, Invalid=1697, Unknown=28, NotChecked=0, Total=2070 [2022-11-03 02:40:27,752 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 487 mSDsluCounter, 2260 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 487 SdHoareTripleChecker+Valid, 2345 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:40:27,752 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [487 Valid, 2345 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 70 Unchecked, 0.0s Time] [2022-11-03 02:40:27,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4090 states. [2022-11-03 02:40:27,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4090 to 4024. [2022-11-03 02:40:27,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4024 states, 4023 states have (on average 1.3895103156848123) internal successors, (5590), 4023 states have internal predecessors, (5590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:40:27,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4024 states to 4024 states and 5590 transitions. [2022-11-03 02:40:27,845 INFO L78 Accepts]: Start accepts. Automaton has 4024 states and 5590 transitions. Word has length 76 [2022-11-03 02:40:27,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:40:27,845 INFO L495 AbstractCegarLoop]: Abstraction has 4024 states and 5590 transitions. [2022-11-03 02:40:27,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 10.222222222222221) internal successors, (368), 36 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:40:27,846 INFO L276 IsEmpty]: Start isEmpty. Operand 4024 states and 5590 transitions. [2022-11-03 02:40:27,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-03 02:40:27,850 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:40:27,850 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:40:27,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-11-03 02:40:28,079 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (36)] Forceful destruction successful, exit code 0 [2022-11-03 02:40:28,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2022-11-03 02:40:28,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:40:28,475 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:40:28,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:40:28,475 INFO L85 PathProgramCache]: Analyzing trace with hash -903427617, now seen corresponding path program 1 times [2022-11-03 02:40:28,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:40:28,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [53260108] [2022-11-03 02:40:28,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:40:28,476 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:40:28,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:40:28,477 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:40:28,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-11-03 02:40:28,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:40:28,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 1010 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:40:28,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:40:29,211 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 02:40:29,211 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:40:29,212 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:40:29,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [53260108] [2022-11-03 02:40:29,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [53260108] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:40:29,212 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:40:29,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:40:29,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472803795] [2022-11-03 02:40:29,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:40:29,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:40:29,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:40:29,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:40:29,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:40:29,213 INFO L87 Difference]: Start difference. First operand 4024 states and 5590 transitions. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:40:29,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:40:29,517 INFO L93 Difference]: Finished difference Result 7108 states and 9962 transitions. [2022-11-03 02:40:29,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:40:29,519 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2022-11-03 02:40:29,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:40:29,526 INFO L225 Difference]: With dead ends: 7108 [2022-11-03 02:40:29,526 INFO L226 Difference]: Without dead ends: 5912 [2022-11-03 02:40:29,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:40:29,529 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 199 mSDsluCounter, 892 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 1106 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:40:29,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 1106 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 20 Unchecked, 0.2s Time] [2022-11-03 02:40:29,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5912 states. [2022-11-03 02:40:29,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5912 to 4388. [2022-11-03 02:40:29,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4388 states, 4387 states have (on average 1.3767950763619785) internal successors, (6040), 4387 states have internal predecessors, (6040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:40:29,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4388 states to 4388 states and 6040 transitions. [2022-11-03 02:40:29,630 INFO L78 Accepts]: Start accepts. Automaton has 4388 states and 6040 transitions. Word has length 76 [2022-11-03 02:40:29,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:40:29,630 INFO L495 AbstractCegarLoop]: Abstraction has 4388 states and 6040 transitions. [2022-11-03 02:40:29,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:40:29,630 INFO L276 IsEmpty]: Start isEmpty. Operand 4388 states and 6040 transitions. [2022-11-03 02:40:29,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-03 02:40:29,635 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:40:29,635 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:40:29,664 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (38)] Ended with exit code 0 [2022-11-03 02:40:29,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:40:29,855 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:40:29,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:40:29,855 INFO L85 PathProgramCache]: Analyzing trace with hash -202363039, now seen corresponding path program 1 times [2022-11-03 02:40:29,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:40:29,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2103229362] [2022-11-03 02:40:29,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:40:29,856 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:40:29,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:40:29,857 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:40:29,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-11-03 02:40:30,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:40:30,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 1010 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-03 02:40:30,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:40:31,836 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:40:31,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:40:38,068 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 02:40:38,068 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:40:38,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2103229362] [2022-11-03 02:40:38,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2103229362] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:40:38,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1165517584] [2022-11-03 02:40:38,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:40:38,069 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:40:38,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:40:38,069 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:40:38,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2022-11-03 02:40:38,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:40:38,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 1010 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-03 02:40:38,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:40:40,201 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:40:40,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:41:36,628 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 02:41:36,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1165517584] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:41:36,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795298842] [2022-11-03 02:41:36,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:36,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:41:36,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:41:36,630 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:41:36,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-11-03 02:41:37,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:37,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 1010 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-03 02:41:37,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:39,703 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:41:39,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:41:43,814 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 02:41:43,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795298842] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:41:43,814 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:41:43,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 9, 9] total 36 [2022-11-03 02:41:43,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429731837] [2022-11-03 02:41:43,815 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:41:43,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-03 02:41:43,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:41:43,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-03 02:41:43,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1055, Unknown=26, NotChecked=0, Total=1260 [2022-11-03 02:41:43,817 INFO L87 Difference]: Start difference. First operand 4388 states and 6040 transitions. Second operand has 36 states, 36 states have (on average 10.222222222222221) internal successors, (368), 36 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:41:45,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:41:45,336 INFO L93 Difference]: Finished difference Result 7412 states and 10243 transitions. [2022-11-03 02:41:45,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-03 02:41:45,337 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 10.222222222222221) internal successors, (368), 36 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2022-11-03 02:41:45,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:41:45,347 INFO L225 Difference]: With dead ends: 7412 [2022-11-03 02:41:45,347 INFO L226 Difference]: Without dead ends: 7410 [2022-11-03 02:41:45,349 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 463 GetRequests, 417 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 65.9s TimeCoverageRelationStatistics Valid=345, Invalid=1699, Unknown=26, NotChecked=0, Total=2070 [2022-11-03 02:41:45,350 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 943 mSDsluCounter, 2268 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 943 SdHoareTripleChecker+Valid, 2356 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:41:45,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [943 Valid, 2356 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 54 Unchecked, 0.0s Time] [2022-11-03 02:41:45,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7410 states. [2022-11-03 02:41:45,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7410 to 7302. [2022-11-03 02:41:45,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7302 states, 7301 states have (on average 1.3832351732639365) internal successors, (10099), 7301 states have internal predecessors, (10099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:41:45,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7302 states to 7302 states and 10099 transitions. [2022-11-03 02:41:45,514 INFO L78 Accepts]: Start accepts. Automaton has 7302 states and 10099 transitions. Word has length 76 [2022-11-03 02:41:45,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:41:45,514 INFO L495 AbstractCegarLoop]: Abstraction has 7302 states and 10099 transitions. [2022-11-03 02:41:45,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 10.222222222222221) internal successors, (368), 36 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:41:45,514 INFO L276 IsEmpty]: Start isEmpty. Operand 7302 states and 10099 transitions. [2022-11-03 02:41:45,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-03 02:41:45,522 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:41:45,522 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:41:45,571 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-11-03 02:41:45,764 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2022-11-03 02:41:45,955 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (40)] Ended with exit code 0 [2022-11-03 02:41:46,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:41:46,150 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:41:46,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:41:46,150 INFO L85 PathProgramCache]: Analyzing trace with hash -1443282463, now seen corresponding path program 1 times [2022-11-03 02:41:46,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:41:46,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1351366210] [2022-11-03 02:41:46,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:46,151 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:41:46,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:41:46,152 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:41:46,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-11-03 02:41:46,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:46,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 1010 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-03 02:41:46,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:48,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:41:48,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:41:58,268 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 02:41:58,268 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:41:58,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1351366210] [2022-11-03 02:41:58,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1351366210] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:41:58,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1815094749] [2022-11-03 02:41:58,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:58,268 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:41:58,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:41:58,269 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:41:58,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (43)] Waiting until timeout for monitored process [2022-11-03 02:41:59,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:59,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 1010 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-03 02:41:59,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:42:00,587 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:42:00,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:43:02,204 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 02:43:02,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1815094749] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:43:02,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532854353] [2022-11-03 02:43:02,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:02,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:43:02,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:43:02,206 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:43:02,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-11-03 02:43:02,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:02,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 1010 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-03 02:43:02,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:43:05,418 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 02:43:05,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:43:10,633 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:43:10,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532854353] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:43:10,633 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:43:10,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 9, 9] total 36 [2022-11-03 02:43:10,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947549069] [2022-11-03 02:43:10,634 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:43:10,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-03 02:43:10,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:43:10,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-03 02:43:10,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1054, Unknown=27, NotChecked=0, Total=1260 [2022-11-03 02:43:10,635 INFO L87 Difference]: Start difference. First operand 7302 states and 10099 transitions. Second operand has 36 states, 36 states have (on average 10.222222222222221) internal successors, (368), 36 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:43:12,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:43:12,785 INFO L93 Difference]: Finished difference Result 8949 states and 12374 transitions. [2022-11-03 02:43:12,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-03 02:43:12,785 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 10.222222222222221) internal successors, (368), 36 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2022-11-03 02:43:12,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:43:12,797 INFO L225 Difference]: With dead ends: 8949 [2022-11-03 02:43:12,797 INFO L226 Difference]: Without dead ends: 8947 [2022-11-03 02:43:12,799 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 463 GetRequests, 417 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 76.3s TimeCoverageRelationStatistics Valid=343, Invalid=1700, Unknown=27, NotChecked=0, Total=2070 [2022-11-03 02:43:12,800 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 1182 mSDsluCounter, 2215 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1182 SdHoareTripleChecker+Valid, 2303 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:43:12,800 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1182 Valid, 2303 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 46 Unchecked, 0.0s Time] [2022-11-03 02:43:12,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8947 states. [2022-11-03 02:43:13,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8947 to 8808. [2022-11-03 02:43:13,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8808 states, 8807 states have (on average 1.383672079028046) internal successors, (12186), 8807 states have internal predecessors, (12186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:43:13,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8808 states to 8808 states and 12186 transitions. [2022-11-03 02:43:13,032 INFO L78 Accepts]: Start accepts. Automaton has 8808 states and 12186 transitions. Word has length 76 [2022-11-03 02:43:13,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:43:13,033 INFO L495 AbstractCegarLoop]: Abstraction has 8808 states and 12186 transitions. [2022-11-03 02:43:13,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 10.222222222222221) internal successors, (368), 36 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:43:13,033 INFO L276 IsEmpty]: Start isEmpty. Operand 8808 states and 12186 transitions. [2022-11-03 02:43:13,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-03 02:43:13,041 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:43:13,041 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:43:13,049 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (43)] Forceful destruction successful, exit code 0 [2022-11-03 02:43:13,272 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-11-03 02:43:13,462 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2022-11-03 02:43:13,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:43:13,649 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:43:13,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:43:13,649 INFO L85 PathProgramCache]: Analyzing trace with hash 643985509, now seen corresponding path program 1 times [2022-11-03 02:43:13,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:43:13,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1274958800] [2022-11-03 02:43:13,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:13,650 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:43:13,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:43:13,652 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:43:13,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-11-03 02:43:14,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:14,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 1010 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-03 02:43:14,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:43:15,551 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 02:43:15,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:43:21,305 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 02:43:21,306 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:43:21,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1274958800] [2022-11-03 02:43:21,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1274958800] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:43:21,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1454394517] [2022-11-03 02:43:21,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:21,307 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:43:21,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:43:21,311 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:43:21,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (46)] Waiting until timeout for monitored process [2022-11-03 02:43:22,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:22,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 1010 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-03 02:43:22,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:43:23,377 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 02:43:23,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:43:24,588 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 02:43:24,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1454394517] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:43:24,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648845844] [2022-11-03 02:43:24,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:24,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:43:24,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:43:24,590 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:43:24,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-11-03 02:43:24,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:24,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 1010 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-03 02:43:24,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:43:27,404 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 02:43:27,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:43:31,495 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 02:43:31,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648845844] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:43:31,495 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:43:31,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 9, 9] total 26 [2022-11-03 02:43:31,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996123111] [2022-11-03 02:43:31,496 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:43:31,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-03 02:43:31,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:43:31,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-03 02:43:31,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=568, Unknown=2, NotChecked=0, Total=650 [2022-11-03 02:43:31,497 INFO L87 Difference]: Start difference. First operand 8808 states and 12186 transitions. Second operand has 26 states, 26 states have (on average 11.384615384615385) internal successors, (296), 26 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:43:32,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:43:32,606 INFO L93 Difference]: Finished difference Result 9214 states and 12686 transitions. [2022-11-03 02:43:32,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 02:43:32,607 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 11.384615384615385) internal successors, (296), 26 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2022-11-03 02:43:32,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:43:32,615 INFO L225 Difference]: With dead ends: 9214 [2022-11-03 02:43:32,615 INFO L226 Difference]: Without dead ends: 9212 [2022-11-03 02:43:32,618 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 426 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=168, Invalid=952, Unknown=2, NotChecked=0, Total=1122 [2022-11-03 02:43:32,618 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 407 mSDsluCounter, 1313 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 1402 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:43:32,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [407 Valid, 1402 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 39 Unchecked, 0.0s Time] [2022-11-03 02:43:32,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9212 states. [2022-11-03 02:43:32,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9212 to 8829. [2022-11-03 02:43:32,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8829 states, 8828 states have (on average 1.3834390575441775) internal successors, (12213), 8828 states have internal predecessors, (12213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:43:32,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8829 states to 8829 states and 12213 transitions. [2022-11-03 02:43:32,855 INFO L78 Accepts]: Start accepts. Automaton has 8829 states and 12213 transitions. Word has length 76 [2022-11-03 02:43:32,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:43:32,855 INFO L495 AbstractCegarLoop]: Abstraction has 8829 states and 12213 transitions. [2022-11-03 02:43:32,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 11.384615384615385) internal successors, (296), 26 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:43:32,856 INFO L276 IsEmpty]: Start isEmpty. Operand 8829 states and 12213 transitions. [2022-11-03 02:43:32,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-03 02:43:32,863 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:43:32,863 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:43:32,901 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-11-03 02:43:33,084 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (46)] Forceful destruction successful, exit code 0 [2022-11-03 02:43:33,291 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2022-11-03 02:43:33,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:43:33,479 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:43:33,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:43:33,479 INFO L85 PathProgramCache]: Analyzing trace with hash 384941159, now seen corresponding path program 1 times [2022-11-03 02:43:33,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:43:33,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1778992377] [2022-11-03 02:43:33,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:33,480 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:43:33,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:43:33,481 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:43:33,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2022-11-03 02:43:33,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:33,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 1010 conjuncts, 54 conjunts are in the unsatisfiable core [2022-11-03 02:43:33,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:43:35,801 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 02:43:35,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:43:49,993 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 02:43:49,993 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:43:49,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1778992377] [2022-11-03 02:43:49,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1778992377] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:43:49,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1784717173] [2022-11-03 02:43:49,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:49,994 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:43:49,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:43:49,995 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:43:49,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (49)] Waiting until timeout for monitored process [2022-11-03 02:43:50,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:50,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 1010 conjuncts, 54 conjunts are in the unsatisfiable core [2022-11-03 02:43:50,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:43:52,318 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 02:43:52,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:45:16,690 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 02:45:16,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1784717173] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:45:16,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371289296] [2022-11-03 02:45:16,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:16,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:45:16,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:45:16,692 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:45:16,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-11-03 02:45:17,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:17,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 1010 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-03 02:45:17,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:45:20,519 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 02:45:20,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:45:26,578 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 02:45:26,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371289296] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:45:26,578 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:45:26,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 9, 9] total 42 [2022-11-03 02:45:26,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823507803] [2022-11-03 02:45:26,579 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:45:26,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-03 02:45:26,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:45:26,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-03 02:45:26,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1469, Unknown=43, NotChecked=0, Total=1722 [2022-11-03 02:45:26,584 INFO L87 Difference]: Start difference. First operand 8829 states and 12213 transitions. Second operand has 42 states, 42 states have (on average 8.761904761904763) internal successors, (368), 42 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:45:29,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:45:29,440 INFO L93 Difference]: Finished difference Result 9118 states and 12562 transitions. [2022-11-03 02:45:29,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-03 02:45:29,441 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 8.761904761904763) internal successors, (368), 42 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2022-11-03 02:45:29,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:45:29,446 INFO L225 Difference]: With dead ends: 9118 [2022-11-03 02:45:29,446 INFO L226 Difference]: Without dead ends: 9116 [2022-11-03 02:45:29,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 414 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 772 ImplicationChecksByTransitivity, 104.2s TimeCoverageRelationStatistics Valid=444, Invalid=2483, Unknown=43, NotChecked=0, Total=2970 [2022-11-03 02:45:29,449 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 495 mSDsluCounter, 3192 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 495 SdHoareTripleChecker+Valid, 3374 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 292 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:45:29,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [495 Valid, 3374 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 292 Unchecked, 0.0s Time] [2022-11-03 02:45:29,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9116 states. [2022-11-03 02:45:29,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9116 to 8841. [2022-11-03 02:45:29,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8841 states, 8840 states have (on average 1.3838235294117647) internal successors, (12233), 8840 states have internal predecessors, (12233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:45:29,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8841 states to 8841 states and 12233 transitions. [2022-11-03 02:45:29,687 INFO L78 Accepts]: Start accepts. Automaton has 8841 states and 12233 transitions. Word has length 76 [2022-11-03 02:45:29,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:45:29,688 INFO L495 AbstractCegarLoop]: Abstraction has 8841 states and 12233 transitions. [2022-11-03 02:45:29,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 8.761904761904763) internal successors, (368), 42 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:45:29,688 INFO L276 IsEmpty]: Start isEmpty. Operand 8841 states and 12233 transitions. [2022-11-03 02:45:29,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-03 02:45:29,695 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:45:29,695 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:45:29,711 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (49)] Ended with exit code 0 [2022-11-03 02:45:29,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2022-11-03 02:45:30,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-11-03 02:45:30,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:45:30,323 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:45:30,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:45:30,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1761067223, now seen corresponding path program 1 times [2022-11-03 02:45:30,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:45:30,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1689375095] [2022-11-03 02:45:30,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:30,325 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:45:30,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:45:30,327 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:45:30,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2022-11-03 02:45:30,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:30,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 1010 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:45:30,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:45:31,000 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 02:45:31,000 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:45:31,001 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:45:31,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1689375095] [2022-11-03 02:45:31,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1689375095] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:45:31,001 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:45:31,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:45:31,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004271188] [2022-11-03 02:45:31,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:45:31,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:45:31,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:45:31,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:45:31,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:45:31,003 INFO L87 Difference]: Start difference. First operand 8841 states and 12233 transitions. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:45:31,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:45:31,505 INFO L93 Difference]: Finished difference Result 19343 states and 26859 transitions. [2022-11-03 02:45:31,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:45:31,507 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2022-11-03 02:45:31,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:45:31,515 INFO L225 Difference]: With dead ends: 19343 [2022-11-03 02:45:31,516 INFO L226 Difference]: Without dead ends: 15064 [2022-11-03 02:45:31,521 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:45:31,522 INFO L413 NwaCegarLoop]: 286 mSDtfsCounter, 199 mSDsluCounter, 866 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 1152 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:45:31,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 1152 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 17 Unchecked, 0.2s Time] [2022-11-03 02:45:31,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15064 states. [2022-11-03 02:45:31,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15064 to 8841. [2022-11-03 02:45:31,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8841 states, 8840 states have (on average 1.3833710407239819) internal successors, (12229), 8840 states have internal predecessors, (12229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:45:31,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8841 states to 8841 states and 12229 transitions. [2022-11-03 02:45:31,781 INFO L78 Accepts]: Start accepts. Automaton has 8841 states and 12229 transitions. Word has length 76 [2022-11-03 02:45:31,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:45:31,781 INFO L495 AbstractCegarLoop]: Abstraction has 8841 states and 12229 transitions. [2022-11-03 02:45:31,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:45:31,782 INFO L276 IsEmpty]: Start isEmpty. Operand 8841 states and 12229 transitions. [2022-11-03 02:45:31,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-03 02:45:31,789 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:45:31,789 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:45:31,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (51)] Forceful destruction successful, exit code 0 [2022-11-03 02:45:32,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:45:32,011 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:45:32,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:45:32,011 INFO L85 PathProgramCache]: Analyzing trace with hash -572325415, now seen corresponding path program 1 times [2022-11-03 02:45:32,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:45:32,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1123385429] [2022-11-03 02:45:32,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:32,012 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:45:32,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:45:32,013 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:45:32,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2022-11-03 02:45:32,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:32,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 1010 conjuncts, 54 conjunts are in the unsatisfiable core [2022-11-03 02:45:32,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:45:34,579 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 02:45:34,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:45:43,111 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 02:45:43,111 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:45:43,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1123385429] [2022-11-03 02:45:43,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1123385429] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:45:43,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [761302616] [2022-11-03 02:45:43,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:43,112 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:45:43,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:45:43,115 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:45:43,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce98d33-fcf7-4c21-9db7-2990bd9fb188/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (53)] Waiting until timeout for monitored process [2022-11-03 02:45:43,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:44,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 1010 conjuncts, 54 conjunts are in the unsatisfiable core [2022-11-03 02:45:44,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:45:45,878 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 02:45:45,879 INFO L328 TraceCheckSpWp]: Computing backward predicates...