./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.cal18.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_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/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_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.cal18.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/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_c64a46fc-b961-4f9d-9348-69c2b8cb4189/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 b8b117d30748a7cc4f3f5d7fcfe97d44c4e3aeb101b917b233cc5bb356acb00c --- 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 04:01:25,116 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 04:01:25,120 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 04:01:25,178 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 04:01:25,178 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 04:01:25,185 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 04:01:25,188 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 04:01:25,194 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 04:01:25,197 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 04:01:25,204 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 04:01:25,205 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 04:01:25,208 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 04:01:25,209 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 04:01:25,212 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 04:01:25,217 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 04:01:25,220 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 04:01:25,223 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 04:01:25,224 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 04:01:25,227 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 04:01:25,236 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 04:01:25,238 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 04:01:25,240 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 04:01:25,244 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 04:01:25,245 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 04:01:25,256 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 04:01:25,258 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 04:01:25,258 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 04:01:25,260 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 04:01:25,261 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 04:01:25,263 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 04:01:25,263 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 04:01:25,265 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 04:01:25,267 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 04:01:25,269 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 04:01:25,270 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 04:01:25,270 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 04:01:25,271 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 04:01:25,272 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 04:01:25,272 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 04:01:25,273 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 04:01:25,274 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 04:01:25,275 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 04:01:25,336 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 04:01:25,336 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 04:01:25,337 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 04:01:25,337 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 04:01:25,338 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 04:01:25,338 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 04:01:25,339 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 04:01:25,339 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 04:01:25,339 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 04:01:25,339 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 04:01:25,341 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 04:01:25,341 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 04:01:25,342 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 04:01:25,342 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 04:01:25,342 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 04:01:25,342 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 04:01:25,343 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 04:01:25,343 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 04:01:25,353 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 04:01:25,353 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 04:01:25,353 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 04:01:25,354 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 04:01:25,354 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 04:01:25,354 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 04:01:25,354 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 04:01:25,355 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 04:01:25,355 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 04:01:25,355 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 04:01:25,355 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 04:01:25,356 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 04:01:25,356 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 04:01:25,356 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 04:01:25,357 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 04:01:25,357 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 04:01:25,357 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 04:01:25,358 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 04:01:25,358 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 04:01:25,358 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 04:01:25,358 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_c64a46fc-b961-4f9d-9348-69c2b8cb4189/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b8b117d30748a7cc4f3f5d7fcfe97d44c4e3aeb101b917b233cc5bb356acb00c [2022-11-03 04:01:25,707 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 04:01:25,754 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 04:01:25,758 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 04:01:25,759 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 04:01:25,760 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 04:01:25,762 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.cal18.c [2022-11-03 04:01:25,842 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/data/83ff3e0c5/c5b3aafbfb5d4f19b410135349cbeb88/FLAG815c58131 [2022-11-03 04:01:26,443 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 04:01:26,444 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.cal18.c [2022-11-03 04:01:26,451 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/data/83ff3e0c5/c5b3aafbfb5d4f19b410135349cbeb88/FLAG815c58131 [2022-11-03 04:01:26,754 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/data/83ff3e0c5/c5b3aafbfb5d4f19b410135349cbeb88 [2022-11-03 04:01:26,757 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 04:01:26,758 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 04:01:26,760 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 04:01:26,760 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 04:01:26,770 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 04:01:26,771 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:01:26" (1/1) ... [2022-11-03 04:01:26,773 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@743d54dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:26, skipping insertion in model container [2022-11-03 04:01:26,773 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:01:26" (1/1) ... [2022-11-03 04:01:26,781 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 04:01:26,806 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 04:01:26,949 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_c64a46fc-b961-4f9d-9348-69c2b8cb4189/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.cal18.c[1107,1120] [2022-11-03 04:01:27,017 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 04:01:27,022 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 04:01:27,036 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_c64a46fc-b961-4f9d-9348-69c2b8cb4189/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.cal18.c[1107,1120] [2022-11-03 04:01:27,087 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 04:01:27,117 INFO L208 MainTranslator]: Completed translation [2022-11-03 04:01:27,118 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:27 WrapperNode [2022-11-03 04:01:27,118 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 04:01:27,119 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 04:01:27,120 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 04:01:27,120 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 04:01:27,130 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:27" (1/1) ... [2022-11-03 04:01:27,156 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:27" (1/1) ... [2022-11-03 04:01:27,228 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 198 [2022-11-03 04:01:27,228 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 04:01:27,229 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 04:01:27,229 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 04:01:27,229 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 04:01:27,258 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:27" (1/1) ... [2022-11-03 04:01:27,259 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:27" (1/1) ... [2022-11-03 04:01:27,262 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:27" (1/1) ... [2022-11-03 04:01:27,263 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:27" (1/1) ... [2022-11-03 04:01:27,279 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:27" (1/1) ... [2022-11-03 04:01:27,284 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:27" (1/1) ... [2022-11-03 04:01:27,303 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:27" (1/1) ... [2022-11-03 04:01:27,305 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:27" (1/1) ... [2022-11-03 04:01:27,309 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 04:01:27,310 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 04:01:27,310 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 04:01:27,310 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 04:01:27,320 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:27" (1/1) ... [2022-11-03 04:01:27,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 04:01:27,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:01:27,376 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 04:01:27,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 04:01:27,460 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 04:01:27,460 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 04:01:27,626 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 04:01:27,629 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 04:01:28,088 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 04:01:28,399 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 04:01:28,399 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 04:01:28,402 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:01:28 BoogieIcfgContainer [2022-11-03 04:01:28,402 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 04:01:28,404 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 04:01:28,405 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 04:01:28,409 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 04:01:28,409 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:01:26" (1/3) ... [2022-11-03 04:01:28,410 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9aabedb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:01:28, skipping insertion in model container [2022-11-03 04:01:28,410 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:27" (2/3) ... [2022-11-03 04:01:28,411 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9aabedb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:01:28, skipping insertion in model container [2022-11-03 04:01:28,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:01:28" (3/3) ... [2022-11-03 04:01:28,413 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.cal18.c [2022-11-03 04:01:28,436 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 04:01:28,436 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 04:01:28,501 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 04:01:28,520 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;@722977af, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 04:01:28,521 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 04:01:28,528 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 04:01:28,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-03 04:01:28,538 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:01:28,539 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-03 04:01:28,540 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:01:28,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:01:28,547 INFO L85 PathProgramCache]: Analyzing trace with hash 4450296, now seen corresponding path program 1 times [2022-11-03 04:01:28,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:01:28,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10822830] [2022-11-03 04:01:28,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:28,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:01:29,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 04:01:29,071 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-03 04:01:29,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 04:01:29,306 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-03 04:01:29,310 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-03 04:01:29,313 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-03 04:01:29,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 04:01:29,321 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-03 04:01:29,327 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-03 04:01:29,360 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2022-11-03 04:01:29,375 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 04:01:29 BoogieIcfgContainer [2022-11-03 04:01:29,376 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-03 04:01:29,379 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-03 04:01:29,379 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-03 04:01:29,379 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-03 04:01:29,381 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:01:28" (3/4) ... [2022-11-03 04:01:29,385 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-03 04:01:29,386 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-03 04:01:29,389 INFO L158 Benchmark]: Toolchain (without parser) took 2629.72ms. Allocated memory was 98.6MB in the beginning and 121.6MB in the end (delta: 23.1MB). Free memory was 72.0MB in the beginning and 77.7MB in the end (delta: -5.7MB). Peak memory consumption was 16.9MB. Max. memory is 16.1GB. [2022-11-03 04:01:29,389 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 98.6MB. Free memory was 68.7MB in the beginning and 68.6MB in the end (delta: 44.9kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 04:01:29,391 INFO L158 Benchmark]: CACSL2BoogieTranslator took 358.68ms. Allocated memory is still 98.6MB. Free memory was 71.8MB in the beginning and 59.6MB in the end (delta: 12.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-03 04:01:29,392 INFO L158 Benchmark]: Boogie Procedure Inliner took 108.95ms. Allocated memory is still 98.6MB. Free memory was 59.6MB in the beginning and 56.4MB in the end (delta: 3.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 04:01:29,400 INFO L158 Benchmark]: Boogie Preprocessor took 80.00ms. Allocated memory is still 98.6MB. Free memory was 56.4MB in the beginning and 54.5MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 04:01:29,401 INFO L158 Benchmark]: RCFGBuilder took 1092.64ms. Allocated memory was 98.6MB in the beginning and 121.6MB in the end (delta: 23.1MB). Free memory was 54.5MB in the beginning and 69.1MB in the end (delta: -14.6MB). Peak memory consumption was 30.0MB. Max. memory is 16.1GB. [2022-11-03 04:01:29,403 INFO L158 Benchmark]: TraceAbstraction took 971.76ms. Allocated memory is still 121.6MB. Free memory was 68.5MB in the beginning and 77.7MB in the end (delta: -9.3MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 04:01:29,403 INFO L158 Benchmark]: Witness Printer took 8.19ms. Allocated memory is still 121.6MB. Free memory is still 77.7MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 04:01:29,412 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 98.6MB. Free memory was 68.7MB in the beginning and 68.6MB in the end (delta: 44.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 358.68ms. Allocated memory is still 98.6MB. Free memory was 71.8MB in the beginning and 59.6MB in the end (delta: 12.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 108.95ms. Allocated memory is still 98.6MB. Free memory was 59.6MB in the beginning and 56.4MB in the end (delta: 3.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 80.00ms. Allocated memory is still 98.6MB. Free memory was 56.4MB in the beginning and 54.5MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 1092.64ms. Allocated memory was 98.6MB in the beginning and 121.6MB in the end (delta: 23.1MB). Free memory was 54.5MB in the beginning and 69.1MB in the end (delta: -14.6MB). Peak memory consumption was 30.0MB. Max. memory is 16.1GB. * TraceAbstraction took 971.76ms. Allocated memory is still 121.6MB. Free memory was 68.5MB in the beginning and 77.7MB in the end (delta: -9.3MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 8.19ms. Allocated memory is still 121.6MB. Free memory is still 77.7MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 20]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseComplement at line 71, overapproximation of bitwiseOr at line 91, overapproximation of bitwiseAnd at line 60. 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_5 mask_SORT_5 = (SORT_5)-1 >> (sizeof(SORT_5) * 8 - 2); [L29] const SORT_5 msb_SORT_5 = (SORT_5)1 << (2 - 1); [L31] const SORT_1 var_10 = 0; [L32] const SORT_5 var_14 = 0; [L33] const SORT_1 var_29 = 1; [L34] const SORT_5 var_39 = 1; [L36] SORT_1 input_2; [L37] SORT_1 input_3; [L38] SORT_1 input_4; [L39] SORT_5 input_6; [L40] SORT_1 input_7; [L41] SORT_5 input_8; [L42] SORT_5 input_9; [L44] SORT_1 state_11 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L45] SORT_5 state_15 = __VERIFIER_nondet_uchar() & mask_SORT_5; [L46] SORT_1 state_17 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L47] SORT_5 state_21 = __VERIFIER_nondet_uchar() & mask_SORT_5; [L49] SORT_1 init_12_arg_1 = var_10; [L50] state_11 = init_12_arg_1 [L51] SORT_5 init_16_arg_1 = var_14; [L52] state_15 = init_16_arg_1 [L53] SORT_1 init_18_arg_1 = var_10; [L54] state_17 = init_18_arg_1 [L55] SORT_5 init_22_arg_1 = var_14; [L56] state_21 = init_22_arg_1 VAL [init_12_arg_1=0, init_16_arg_1=0, init_18_arg_1=0, init_22_arg_1=0, mask_SORT_1=1, mask_SORT_5=3, msb_SORT_1=1, msb_SORT_5=2, state_11=0, state_15=0, state_17=0, state_21=0, var_10=0, var_14=0, var_29=1, var_39=1] [L59] input_2 = __VERIFIER_nondet_uchar() [L60] input_2 = input_2 & mask_SORT_1 [L61] input_3 = __VERIFIER_nondet_uchar() [L62] input_3 = input_3 & mask_SORT_1 [L63] input_4 = __VERIFIER_nondet_uchar() [L64] input_6 = __VERIFIER_nondet_uchar() [L65] input_7 = __VERIFIER_nondet_uchar() [L66] input_8 = __VERIFIER_nondet_uchar() [L67] input_9 = __VERIFIER_nondet_uchar() [L70] SORT_1 var_13_arg_0 = state_11; [L71] SORT_1 var_13 = ~var_13_arg_0; [L72] SORT_1 var_19_arg_0 = state_17; [L73] SORT_5 var_19_arg_1 = state_15; [L74] SORT_5 var_19_arg_2 = input_6; [L75] EXPR var_19_arg_0 ? var_19_arg_1 : var_19_arg_2 [L75] SORT_5 var_19 = var_19_arg_0 ? var_19_arg_1 : var_19_arg_2; [L76] SORT_5 var_20_arg_0 = var_19; [L77] SORT_1 var_20 = var_20_arg_0 >> 0; [L78] var_20 = var_20 & mask_SORT_1 [L79] SORT_1 var_23_arg_0 = state_17; [L80] SORT_5 var_23_arg_1 = state_21; [L81] SORT_5 var_23_arg_2 = input_6; [L82] EXPR var_23_arg_0 ? var_23_arg_1 : var_23_arg_2 [L82] SORT_5 var_23 = var_23_arg_0 ? var_23_arg_1 : var_23_arg_2; [L83] SORT_5 var_24_arg_0 = var_23; [L84] SORT_1 var_24 = var_24_arg_0 >> 0; [L85] var_24 = var_24 & mask_SORT_1 [L86] SORT_1 var_25_arg_0 = var_20; [L87] SORT_1 var_25_arg_1 = var_24; [L88] SORT_1 var_25 = var_25_arg_0 == var_25_arg_1; [L89] SORT_1 var_26_arg_0 = var_13; [L90] SORT_1 var_26_arg_1 = var_25; [L91] SORT_1 var_26 = var_26_arg_0 | var_26_arg_1; [L92] SORT_1 var_30_arg_0 = var_26; [L93] SORT_1 var_30 = ~var_30_arg_0; [L94] SORT_1 var_31_arg_0 = var_29; [L95] SORT_1 var_31_arg_1 = var_30; [L96] SORT_1 var_31 = var_31_arg_0 & var_31_arg_1; [L97] var_31 = var_31 & mask_SORT_1 [L98] SORT_1 bad_32_arg_0 = var_31; [L99] CALL __VERIFIER_assert(!(bad_32_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: 0.8s, 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, 0.4s 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 04:01:29,462 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/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_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.cal18.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/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_c64a46fc-b961-4f9d-9348-69c2b8cb4189/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 b8b117d30748a7cc4f3f5d7fcfe97d44c4e3aeb101b917b233cc5bb356acb00c --- 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 04:01:32,122 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 04:01:32,124 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 04:01:32,179 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 04:01:32,179 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 04:01:32,185 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 04:01:32,189 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 04:01:32,194 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 04:01:32,202 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 04:01:32,203 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 04:01:32,204 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 04:01:32,206 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 04:01:32,206 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 04:01:32,208 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 04:01:32,209 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 04:01:32,213 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 04:01:32,215 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 04:01:32,223 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 04:01:32,229 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 04:01:32,235 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 04:01:32,245 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 04:01:32,248 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 04:01:32,250 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 04:01:32,252 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 04:01:32,257 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 04:01:32,260 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 04:01:32,260 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 04:01:32,262 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 04:01:32,264 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 04:01:32,265 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 04:01:32,267 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 04:01:32,268 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 04:01:32,270 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 04:01:32,284 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 04:01:32,286 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 04:01:32,286 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 04:01:32,287 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 04:01:32,288 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 04:01:32,288 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 04:01:32,291 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 04:01:32,292 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 04:01:32,293 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2022-11-03 04:01:32,346 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 04:01:32,347 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 04:01:32,347 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 04:01:32,348 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 04:01:32,350 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 04:01:32,350 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 04:01:32,350 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 04:01:32,351 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 04:01:32,351 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 04:01:32,351 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 04:01:32,352 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 04:01:32,353 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 04:01:32,355 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 04:01:32,355 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 04:01:32,355 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 04:01:32,356 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 04:01:32,356 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 04:01:32,356 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 04:01:32,356 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 04:01:32,357 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 04:01:32,357 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 04:01:32,357 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 04:01:32,358 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 04:01:32,358 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 04:01:32,358 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 04:01:32,358 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 04:01:32,359 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 04:01:32,359 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 04:01:32,359 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 04:01:32,360 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 04:01:32,360 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 04:01:32,360 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 04:01:32,361 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 04:01:32,361 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 04:01:32,361 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 04:01:32,362 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_c64a46fc-b961-4f9d-9348-69c2b8cb4189/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b8b117d30748a7cc4f3f5d7fcfe97d44c4e3aeb101b917b233cc5bb356acb00c [2022-11-03 04:01:32,831 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 04:01:32,863 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 04:01:32,869 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 04:01:32,871 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 04:01:32,872 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 04:01:32,874 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.cal18.c [2022-11-03 04:01:32,961 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/data/0e0da5d9c/99b99cb5390f4a81add34cfefdeb8eaa/FLAG7254de062 [2022-11-03 04:01:33,664 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 04:01:33,667 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.cal18.c [2022-11-03 04:01:33,679 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/data/0e0da5d9c/99b99cb5390f4a81add34cfefdeb8eaa/FLAG7254de062 [2022-11-03 04:01:33,978 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/data/0e0da5d9c/99b99cb5390f4a81add34cfefdeb8eaa [2022-11-03 04:01:33,982 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 04:01:33,983 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 04:01:33,985 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 04:01:33,985 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 04:01:33,991 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 04:01:33,993 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:01:33" (1/1) ... [2022-11-03 04:01:33,995 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ddea73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:33, skipping insertion in model container [2022-11-03 04:01:33,998 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:01:33" (1/1) ... [2022-11-03 04:01:34,008 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 04:01:34,049 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 04:01:34,199 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_c64a46fc-b961-4f9d-9348-69c2b8cb4189/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.cal18.c[1107,1120] [2022-11-03 04:01:34,270 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 04:01:34,275 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 04:01:34,302 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_c64a46fc-b961-4f9d-9348-69c2b8cb4189/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.cal18.c[1107,1120] [2022-11-03 04:01:34,375 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 04:01:34,390 INFO L208 MainTranslator]: Completed translation [2022-11-03 04:01:34,391 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:34 WrapperNode [2022-11-03 04:01:34,391 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 04:01:34,393 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 04:01:34,393 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 04:01:34,393 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 04:01:34,402 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:34" (1/1) ... [2022-11-03 04:01:34,413 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:34" (1/1) ... [2022-11-03 04:01:34,447 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 198 [2022-11-03 04:01:34,448 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 04:01:34,448 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 04:01:34,449 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 04:01:34,449 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 04:01:34,460 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:34" (1/1) ... [2022-11-03 04:01:34,461 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:34" (1/1) ... [2022-11-03 04:01:34,466 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:34" (1/1) ... [2022-11-03 04:01:34,467 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:34" (1/1) ... [2022-11-03 04:01:34,475 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:34" (1/1) ... [2022-11-03 04:01:34,481 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:34" (1/1) ... [2022-11-03 04:01:34,483 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:34" (1/1) ... [2022-11-03 04:01:34,485 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:34" (1/1) ... [2022-11-03 04:01:34,488 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 04:01:34,489 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 04:01:34,490 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 04:01:34,490 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 04:01:34,491 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:34" (1/1) ... [2022-11-03 04:01:34,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 04:01:34,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:01:34,527 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 04:01:34,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 04:01:34,591 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 04:01:34,591 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 04:01:34,744 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 04:01:34,747 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 04:01:35,308 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 04:01:35,318 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 04:01:35,318 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 04:01:35,320 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:01:35 BoogieIcfgContainer [2022-11-03 04:01:35,321 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 04:01:35,323 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 04:01:35,324 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 04:01:35,327 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 04:01:35,328 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:01:33" (1/3) ... [2022-11-03 04:01:35,329 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44fa389c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:01:35, skipping insertion in model container [2022-11-03 04:01:35,329 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:34" (2/3) ... [2022-11-03 04:01:35,330 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44fa389c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:01:35, skipping insertion in model container [2022-11-03 04:01:35,331 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:01:35" (3/3) ... [2022-11-03 04:01:35,332 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.cal18.c [2022-11-03 04:01:35,355 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 04:01:35,356 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 04:01:35,465 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 04:01:35,487 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;@343505ad, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 04:01:35,488 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 04:01:35,537 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 33 states have (on average 1.4848484848484849) internal successors, (49), 34 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:35,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-03 04:01:35,545 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:01:35,546 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:01:35,547 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:01:35,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:01:35,555 INFO L85 PathProgramCache]: Analyzing trace with hash -332259343, now seen corresponding path program 1 times [2022-11-03 04:01:35,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:01:35,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1835366368] [2022-11-03 04:01:35,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:35,572 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:01:35,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:01:35,579 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:01:35,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 04:01:35,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:35,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 04:01:35,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:35,817 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 04:01:35,818 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:01:35,819 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:01:35,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1835366368] [2022-11-03 04:01:35,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1835366368] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:01:35,820 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:01:35,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:01:35,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153451296] [2022-11-03 04:01:35,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:01:35,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:01:35,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:01:35,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:01:35,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:01:35,867 INFO L87 Difference]: Start difference. First operand has 35 states, 33 states have (on average 1.4848484848484849) internal successors, (49), 34 states have internal predecessors, (49), 0 states have call successors, (0), 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 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:35,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:01:35,941 INFO L93 Difference]: Finished difference Result 121 states and 179 transitions. [2022-11-03 04:01:35,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 04:01:35,944 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-03 04:01:35,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:01:35,955 INFO L225 Difference]: With dead ends: 121 [2022-11-03 04:01:35,955 INFO L226 Difference]: Without dead ends: 88 [2022-11-03 04:01:35,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:01:35,963 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 116 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:01:35,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 155 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 04:01:35,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-11-03 04:01:36,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 33. [2022-11-03 04:01:36,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.40625) internal successors, (45), 32 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:36,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 45 transitions. [2022-11-03 04:01:36,023 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 45 transitions. Word has length 9 [2022-11-03 04:01:36,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:01:36,024 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 45 transitions. [2022-11-03 04:01:36,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:36,025 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 45 transitions. [2022-11-03 04:01:36,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-03 04:01:36,026 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:01:36,026 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:01:36,037 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-03 04:01:36,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:01:36,228 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:01:36,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:01:36,229 INFO L85 PathProgramCache]: Analyzing trace with hash -275001041, now seen corresponding path program 1 times [2022-11-03 04:01:36,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:01:36,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1545747724] [2022-11-03 04:01:36,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:36,231 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:01:36,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:01:36,235 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:01:36,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 04:01:36,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:36,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 04:01:36,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:36,379 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 04:01:36,379 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:01:36,380 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:01:36,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1545747724] [2022-11-03 04:01:36,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1545747724] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:01:36,381 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:01:36,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:01:36,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412305782] [2022-11-03 04:01:36,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:01:36,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:01:36,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:01:36,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:01:36,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:01:36,384 INFO L87 Difference]: Start difference. First operand 33 states and 45 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:36,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:01:36,431 INFO L93 Difference]: Finished difference Result 117 states and 163 transitions. [2022-11-03 04:01:36,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 04:01:36,432 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-03 04:01:36,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:01:36,446 INFO L225 Difference]: With dead ends: 117 [2022-11-03 04:01:36,446 INFO L226 Difference]: Without dead ends: 88 [2022-11-03 04:01:36,448 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:01:36,450 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 110 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:01:36,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 154 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 04:01:36,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-11-03 04:01:36,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 35. [2022-11-03 04:01:36,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 34 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:36,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 47 transitions. [2022-11-03 04:01:36,472 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 47 transitions. Word has length 9 [2022-11-03 04:01:36,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:01:36,473 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 47 transitions. [2022-11-03 04:01:36,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:36,473 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 47 transitions. [2022-11-03 04:01:36,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-03 04:01:36,474 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:01:36,474 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:01:36,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 04:01:36,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:01:36,675 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:01:36,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:01:36,676 INFO L85 PathProgramCache]: Analyzing trace with hash -274941459, now seen corresponding path program 1 times [2022-11-03 04:01:36,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:01:36,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1217846727] [2022-11-03 04:01:36,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:36,677 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:01:36,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:01:36,687 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:01:36,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 04:01:36,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:36,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 04:01:36,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:36,970 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 04:01:36,970 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:01:36,971 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:01:36,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1217846727] [2022-11-03 04:01:36,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1217846727] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:01:36,972 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:01:36,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 04:01:36,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211990317] [2022-11-03 04:01:36,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:01:36,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:01:36,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:01:36,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:01:36,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:01:36,974 INFO L87 Difference]: Start difference. First operand 35 states and 47 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:37,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:01:37,086 INFO L93 Difference]: Finished difference Result 65 states and 89 transitions. [2022-11-03 04:01:37,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:01:37,088 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-03 04:01:37,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:01:37,093 INFO L225 Difference]: With dead ends: 65 [2022-11-03 04:01:37,093 INFO L226 Difference]: Without dead ends: 63 [2022-11-03 04:01:37,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:01:37,099 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 106 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:01:37,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 152 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:01:37,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-11-03 04:01:37,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 37. [2022-11-03 04:01:37,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:37,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 49 transitions. [2022-11-03 04:01:37,118 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 49 transitions. Word has length 9 [2022-11-03 04:01:37,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:01:37,118 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 49 transitions. [2022-11-03 04:01:37,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:37,119 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 49 transitions. [2022-11-03 04:01:37,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-03 04:01:37,120 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:01:37,121 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:01:37,141 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-03 04:01:37,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:01:37,342 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:01:37,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:01:37,342 INFO L85 PathProgramCache]: Analyzing trace with hash 649010465, now seen corresponding path program 1 times [2022-11-03 04:01:37,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:01:37,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1983518462] [2022-11-03 04:01:37,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:37,344 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:01:37,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:01:37,346 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:01:37,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-03 04:01:37,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:37,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 04:01:37,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:37,581 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:01:37,582 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:01:37,582 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:01:37,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1983518462] [2022-11-03 04:01:37,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1983518462] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:01:37,583 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:01:37,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:01:37,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878663187] [2022-11-03 04:01:37,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:01:37,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:01:37,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:01:37,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:01:37,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:01:37,586 INFO L87 Difference]: Start difference. First operand 37 states and 49 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:37,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:01:37,633 INFO L93 Difference]: Finished difference Result 75 states and 103 transitions. [2022-11-03 04:01:37,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 04:01:37,634 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-11-03 04:01:37,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:01:37,635 INFO L225 Difference]: With dead ends: 75 [2022-11-03 04:01:37,635 INFO L226 Difference]: Without dead ends: 46 [2022-11-03 04:01:37,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:01:37,637 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 65 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:01:37,638 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 72 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 04:01:37,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-11-03 04:01:37,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 37. [2022-11-03 04:01:37,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.3333333333333333) internal successors, (48), 36 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:37,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2022-11-03 04:01:37,644 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 36 [2022-11-03 04:01:37,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:01:37,644 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2022-11-03 04:01:37,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:37,645 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2022-11-03 04:01:37,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-03 04:01:37,646 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:01:37,646 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:01:37,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-03 04:01:37,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:01:37,861 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:01:37,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:01:37,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1039933277, now seen corresponding path program 1 times [2022-11-03 04:01:37,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:01:37,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [223892983] [2022-11-03 04:01:37,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:37,863 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:01:37,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:01:37,864 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:01:37,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-03 04:01:37,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:38,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 04:01:38,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:38,108 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:01:38,108 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:01:38,108 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:01:38,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [223892983] [2022-11-03 04:01:38,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [223892983] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:01:38,114 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:01:38,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:01:38,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863471572] [2022-11-03 04:01:38,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:01:38,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:01:38,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:01:38,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:01:38,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:01:38,116 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:38,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:01:38,171 INFO L93 Difference]: Finished difference Result 83 states and 112 transitions. [2022-11-03 04:01:38,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 04:01:38,171 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-11-03 04:01:38,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:01:38,173 INFO L225 Difference]: With dead ends: 83 [2022-11-03 04:01:38,173 INFO L226 Difference]: Without dead ends: 54 [2022-11-03 04:01:38,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:01:38,178 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 55 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:01:38,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 87 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 04:01:38,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-11-03 04:01:38,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 37. [2022-11-03 04:01:38,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.3055555555555556) internal successors, (47), 36 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:38,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2022-11-03 04:01:38,189 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 36 [2022-11-03 04:01:38,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:01:38,189 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2022-11-03 04:01:38,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:38,190 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2022-11-03 04:01:38,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-03 04:01:38,193 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:01:38,193 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:01:38,214 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-03 04:01:38,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:01:38,408 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:01:38,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:01:38,409 INFO L85 PathProgramCache]: Analyzing trace with hash -338868699, now seen corresponding path program 1 times [2022-11-03 04:01:38,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:01:38,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1079182719] [2022-11-03 04:01:38,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:38,410 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:01:38,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:01:38,412 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:01:38,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-03 04:01:38,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:38,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 04:01:38,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:38,794 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:01:38,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:01:38,971 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:01:38,971 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:01:38,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1079182719] [2022-11-03 04:01:38,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1079182719] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:01:38,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1947635821] [2022-11-03 04:01:38,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:38,972 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:01:38,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:01:38,976 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:01:39,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2022-11-03 04:01:39,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:39,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 04:01:39,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:39,414 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:01:39,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:01:39,535 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:01:39,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1947635821] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:01:39,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475486520] [2022-11-03 04:01:39,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:39,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:01:39,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:01:39,542 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:01:39,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 04:01:39,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:39,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 04:01:39,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:39,844 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:01:39,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:01:39,946 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:01:39,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475486520] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:01:39,946 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:01:39,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 11 [2022-11-03 04:01:39,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443816851] [2022-11-03 04:01:39,947 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:01:39,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-03 04:01:39,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:01:39,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-03 04:01:39,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-11-03 04:01:39,949 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:40,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:01:40,425 INFO L93 Difference]: Finished difference Result 157 states and 206 transitions. [2022-11-03 04:01:40,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-03 04:01:40,426 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-11-03 04:01:40,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:01:40,427 INFO L225 Difference]: With dead ends: 157 [2022-11-03 04:01:40,427 INFO L226 Difference]: Without dead ends: 128 [2022-11-03 04:01:40,431 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2022-11-03 04:01:40,433 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 285 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:01:40,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 328 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:01:40,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-11-03 04:01:40,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 44. [2022-11-03 04:01:40,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.2790697674418605) internal successors, (55), 43 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:40,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 55 transitions. [2022-11-03 04:01:40,449 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 55 transitions. Word has length 36 [2022-11-03 04:01:40,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:01:40,450 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 55 transitions. [2022-11-03 04:01:40,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:40,450 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 55 transitions. [2022-11-03 04:01:40,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-03 04:01:40,453 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:01:40,454 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:01:40,457 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (8)] Ended with exit code 0 [2022-11-03 04:01:40,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-03 04:01:40,884 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-03 04:01:41,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:01:41,059 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:01:41,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:01:41,059 INFO L85 PathProgramCache]: Analyzing trace with hash -281610397, now seen corresponding path program 1 times [2022-11-03 04:01:41,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:01:41,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1804612700] [2022-11-03 04:01:41,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:41,060 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:01:41,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:01:41,062 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:01:41,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-03 04:01:41,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:41,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 04:01:41,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:41,377 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:01:41,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:01:41,523 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:01:41,524 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:01:41,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1804612700] [2022-11-03 04:01:41,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1804612700] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:01:41,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [234840062] [2022-11-03 04:01:41,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:41,525 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:01:41,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:01:41,527 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:01:41,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2022-11-03 04:01:41,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:41,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:01:41,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:41,746 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 04:01:41,746 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:01:41,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [234840062] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:01:41,747 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:01:41,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 12 [2022-11-03 04:01:41,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411421083] [2022-11-03 04:01:41,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:01:41,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:01:41,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:01:41,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:01:41,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-11-03 04:01:41,752 INFO L87 Difference]: Start difference. First operand 44 states and 55 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:41,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:01:41,847 INFO L93 Difference]: Finished difference Result 148 states and 190 transitions. [2022-11-03 04:01:41,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 04:01:41,848 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-11-03 04:01:41,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:01:41,853 INFO L225 Difference]: With dead ends: 148 [2022-11-03 04:01:41,853 INFO L226 Difference]: Without dead ends: 112 [2022-11-03 04:01:41,853 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-11-03 04:01:41,855 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 179 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:01:41,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 139 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 04:01:41,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-11-03 04:01:41,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 46. [2022-11-03 04:01:41,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.2666666666666666) internal successors, (57), 45 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:41,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 57 transitions. [2022-11-03 04:01:41,872 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 57 transitions. Word has length 36 [2022-11-03 04:01:41,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:01:41,873 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 57 transitions. [2022-11-03 04:01:41,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:41,873 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 57 transitions. [2022-11-03 04:01:41,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-03 04:01:41,874 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:01:41,874 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:01:41,902 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-03 04:01:42,101 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2022-11-03 04:01:42,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:01:42,299 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:01:42,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:01:42,300 INFO L85 PathProgramCache]: Analyzing trace with hash -281550815, now seen corresponding path program 1 times [2022-11-03 04:01:42,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:01:42,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [673811897] [2022-11-03 04:01:42,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:42,301 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:01:42,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:01:42,303 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:01:42,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-03 04:01:42,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:42,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 04:01:42,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:42,640 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 04:01:42,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:01:43,357 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 04:01:43,357 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:01:43,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [673811897] [2022-11-03 04:01:43,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [673811897] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:01:43,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1557533875] [2022-11-03 04:01:43,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:43,359 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:01:43,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:01:43,360 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:01:43,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2022-11-03 04:01:43,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:43,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-03 04:01:43,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:43,725 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 04:01:43,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:01:44,029 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 04:01:44,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1557533875] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:01:44,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38931554] [2022-11-03 04:01:44,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:44,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:01:44,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:01:44,031 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:01:44,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-03 04:01:44,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:44,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-03 04:01:44,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:44,352 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 04:01:44,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:01:44,657 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 04:01:44,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38931554] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:01:44,657 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:01:44,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 9, 9] total 16 [2022-11-03 04:01:44,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455133797] [2022-11-03 04:01:44,658 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:01:44,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-03 04:01:44,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:01:44,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-03 04:01:44,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-11-03 04:01:44,660 INFO L87 Difference]: Start difference. First operand 46 states and 57 transitions. Second operand has 16 states, 16 states have (on average 4.625) internal successors, (74), 16 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:44,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:01:44,933 INFO L93 Difference]: Finished difference Result 50 states and 61 transitions. [2022-11-03 04:01:44,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 04:01:44,934 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.625) internal successors, (74), 16 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-11-03 04:01:44,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:01:44,935 INFO L225 Difference]: With dead ends: 50 [2022-11-03 04:01:44,935 INFO L226 Difference]: Without dead ends: 48 [2022-11-03 04:01:44,935 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 195 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=138, Invalid=368, Unknown=0, NotChecked=0, Total=506 [2022-11-03 04:01:44,936 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 118 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:01:44,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 246 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 38 Unchecked, 0.0s Time] [2022-11-03 04:01:44,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-03 04:01:44,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2022-11-03 04:01:44,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 41 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:44,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 53 transitions. [2022-11-03 04:01:44,942 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 53 transitions. Word has length 36 [2022-11-03 04:01:44,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:01:44,943 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 53 transitions. [2022-11-03 04:01:44,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.625) internal successors, (74), 16 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:44,943 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 53 transitions. [2022-11-03 04:01:44,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-03 04:01:44,944 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:01:44,944 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:01:44,989 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-03 04:01:45,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2022-11-03 04:01:45,373 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-03 04:01:45,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:01:45,563 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:01:45,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:01:45,564 INFO L85 PathProgramCache]: Analyzing trace with hash -925674713, now seen corresponding path program 1 times [2022-11-03 04:01:45,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:01:45,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [58488527] [2022-11-03 04:01:45,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:45,565 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:01:45,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:01:45,567 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:01:45,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-03 04:01:45,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:45,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 04:01:45,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:45,792 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:01:45,793 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:01:45,793 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:01:45,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [58488527] [2022-11-03 04:01:45,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [58488527] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:01:45,793 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:01:45,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 04:01:45,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788024585] [2022-11-03 04:01:45,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:01:45,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:01:45,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:01:45,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:01:45,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:01:45,796 INFO L87 Difference]: Start difference. First operand 42 states and 53 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:45,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:01:45,888 INFO L93 Difference]: Finished difference Result 130 states and 166 transitions. [2022-11-03 04:01:45,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:01:45,889 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-11-03 04:01:45,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:01:45,890 INFO L225 Difference]: With dead ends: 130 [2022-11-03 04:01:45,890 INFO L226 Difference]: Without dead ends: 90 [2022-11-03 04:01:45,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:01:45,891 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 80 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:01:45,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 158 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:01:45,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-11-03 04:01:45,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 64. [2022-11-03 04:01:45,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.2857142857142858) internal successors, (81), 63 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:45,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 81 transitions. [2022-11-03 04:01:45,912 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 81 transitions. Word has length 36 [2022-11-03 04:01:45,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:01:45,913 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 81 transitions. [2022-11-03 04:01:45,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:45,913 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 81 transitions. [2022-11-03 04:01:45,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-03 04:01:45,915 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:01:45,915 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:01:45,936 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-03 04:01:46,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:01:46,126 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:01:46,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:01:46,127 INFO L85 PathProgramCache]: Analyzing trace with hash -773460877, now seen corresponding path program 1 times [2022-11-03 04:01:46,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:01:46,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [702560952] [2022-11-03 04:01:46,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:46,128 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:01:46,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:01:46,129 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:01:46,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-03 04:01:46,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:46,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 04:01:46,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:46,516 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 21 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:01:46,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:01:46,687 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 21 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:01:46,687 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:01:46,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [702560952] [2022-11-03 04:01:46,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [702560952] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:01:46,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1483064086] [2022-11-03 04:01:46,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:46,688 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:01:46,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:01:46,690 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:01:46,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2022-11-03 04:01:46,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:46,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:01:46,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:46,991 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 04:01:46,991 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:01:46,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1483064086] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:01:46,992 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:01:46,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 7] total 13 [2022-11-03 04:01:46,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22433013] [2022-11-03 04:01:46,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:01:46,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:01:46,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:01:46,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:01:46,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-11-03 04:01:46,995 INFO L87 Difference]: Start difference. First operand 64 states and 81 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:47,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:01:47,110 INFO L93 Difference]: Finished difference Result 146 states and 185 transitions. [2022-11-03 04:01:47,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:01:47,112 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-11-03 04:01:47,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:01:47,113 INFO L225 Difference]: With dead ends: 146 [2022-11-03 04:01:47,113 INFO L226 Difference]: Without dead ends: 106 [2022-11-03 04:01:47,114 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-11-03 04:01:47,115 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 117 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:01:47,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 190 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 04:01:47,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-11-03 04:01:47,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 64. [2022-11-03 04:01:47,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.2857142857142858) internal successors, (81), 63 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:47,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 81 transitions. [2022-11-03 04:01:47,128 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 81 transitions. Word has length 63 [2022-11-03 04:01:47,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:01:47,128 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 81 transitions. [2022-11-03 04:01:47,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:47,129 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 81 transitions. [2022-11-03 04:01:47,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-03 04:01:47,137 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:01:47,137 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:01:47,158 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-03 04:01:47,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2022-11-03 04:01:47,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:01:47,550 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:01:47,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:01:47,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1933158517, now seen corresponding path program 1 times [2022-11-03 04:01:47,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:01:47,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1526374492] [2022-11-03 04:01:47,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:47,552 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:01:47,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:01:47,553 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:01:47,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-03 04:01:47,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:47,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 04:01:47,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:47,965 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 13 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:01:47,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:01:48,133 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 13 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:01:48,133 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:01:48,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1526374492] [2022-11-03 04:01:48,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1526374492] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:01:48,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [711305648] [2022-11-03 04:01:48,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:48,134 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:01:48,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:01:48,135 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:01:48,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2022-11-03 04:01:48,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:48,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:01:48,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:48,430 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 04:01:48,430 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:01:48,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [711305648] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:01:48,431 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:01:48,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 7] total 11 [2022-11-03 04:01:48,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413871097] [2022-11-03 04:01:48,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:01:48,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:01:48,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:01:48,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:01:48,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-11-03 04:01:48,433 INFO L87 Difference]: Start difference. First operand 64 states and 81 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:48,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:01:48,549 INFO L93 Difference]: Finished difference Result 160 states and 199 transitions. [2022-11-03 04:01:48,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:01:48,550 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-11-03 04:01:48,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:01:48,551 INFO L225 Difference]: With dead ends: 160 [2022-11-03 04:01:48,551 INFO L226 Difference]: Without dead ends: 116 [2022-11-03 04:01:48,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-11-03 04:01:48,553 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 75 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:01:48,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 230 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:01:48,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-11-03 04:01:48,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 72. [2022-11-03 04:01:48,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.2535211267605635) internal successors, (89), 71 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:48,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 89 transitions. [2022-11-03 04:01:48,571 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 89 transitions. Word has length 63 [2022-11-03 04:01:48,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:01:48,573 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 89 transitions. [2022-11-03 04:01:48,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:48,573 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 89 transitions. [2022-11-03 04:01:48,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-03 04:01:48,576 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:01:48,577 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:01:48,586 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2022-11-03 04:01:48,790 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-03 04:01:48,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:01:48,980 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:01:48,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:01:48,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1681750409, now seen corresponding path program 1 times [2022-11-03 04:01:48,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:01:48,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [879449545] [2022-11-03 04:01:48,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:48,982 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:01:48,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:01:48,983 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:01:48,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-03 04:01:49,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:49,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-03 04:01:49,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:50,085 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 04:01:50,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:01:52,930 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 04:01:52,930 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:01:52,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [879449545] [2022-11-03 04:01:52,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [879449545] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:01:52,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1825443144] [2022-11-03 04:01:52,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:52,931 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:01:52,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:01:52,933 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:01:52,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2022-11-03 04:01:53,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:53,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-03 04:01:53,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:53,551 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 04:01:53,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:01:54,052 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 04:01:54,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1825443144] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:01:54,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508800012] [2022-11-03 04:01:54,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:54,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:01:54,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:01:54,055 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:01:54,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-03 04:01:54,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:54,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-03 04:01:54,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:54,719 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 04:01:54,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:01:55,369 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 04:01:55,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508800012] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:01:55,370 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:01:55,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 18, 22, 18, 23, 19] total 40 [2022-11-03 04:01:55,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957852346] [2022-11-03 04:01:55,371 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:01:55,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-03 04:01:55,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:01:55,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-03 04:01:55,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1398, Unknown=0, NotChecked=0, Total=1560 [2022-11-03 04:01:55,374 INFO L87 Difference]: Start difference. First operand 72 states and 89 transitions. Second operand has 40 states, 40 states have (on average 2.6) internal successors, (104), 40 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:05,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:05,659 INFO L93 Difference]: Finished difference Result 251 states and 305 transitions. [2022-11-03 04:02:05,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-11-03 04:02:05,661 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.6) internal successors, (104), 40 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-11-03 04:02:05,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:05,663 INFO L225 Difference]: With dead ends: 251 [2022-11-03 04:02:05,664 INFO L226 Difference]: Without dead ends: 249 [2022-11-03 04:02:05,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 334 SyntacticMatches, 4 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2548 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=2022, Invalid=10410, Unknown=0, NotChecked=0, Total=12432 [2022-11-03 04:02:05,670 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 680 mSDsluCounter, 1184 mSDsCounter, 0 mSdLazyCounter, 793 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 680 SdHoareTripleChecker+Valid, 1241 SdHoareTripleChecker+Invalid, 1811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 793 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 959 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:05,671 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [680 Valid, 1241 Invalid, 1811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 793 Invalid, 0 Unknown, 959 Unchecked, 1.0s Time] [2022-11-03 04:02:05,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-11-03 04:02:05,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 72. [2022-11-03 04:02:05,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.2535211267605635) internal successors, (89), 71 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:05,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 89 transitions. [2022-11-03 04:02:05,681 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 89 transitions. Word has length 63 [2022-11-03 04:02:05,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:05,682 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 89 transitions. [2022-11-03 04:02:05,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.6) internal successors, (104), 40 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:05,682 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 89 transitions. [2022-11-03 04:02:05,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-03 04:02:05,684 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:05,684 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:02:05,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-03 04:02:05,909 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2022-11-03 04:02:06,117 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-03 04:02:06,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:02:06,307 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:06,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:06,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1681690827, now seen corresponding path program 1 times [2022-11-03 04:02:06,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:02:06,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [855362972] [2022-11-03 04:02:06,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:06,308 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:02:06,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:02:06,310 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:02:06,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-03 04:02:06,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:06,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 04:02:06,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:06,795 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 04:02:06,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:02:07,109 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 04:02:07,110 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:02:07,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [855362972] [2022-11-03 04:02:07,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [855362972] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:02:07,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [447013219] [2022-11-03 04:02:07,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:07,111 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:02:07,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:02:07,115 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:02:07,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2022-11-03 04:02:07,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:07,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:02:07,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:07,369 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-03 04:02:07,369 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:02:07,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [447013219] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:07,370 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:02:07,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10, 10] total 19 [2022-11-03 04:02:07,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288245836] [2022-11-03 04:02:07,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:07,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:02:07,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:02:07,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:02:07,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2022-11-03 04:02:07,372 INFO L87 Difference]: Start difference. First operand 72 states and 89 transitions. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:07,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:07,494 INFO L93 Difference]: Finished difference Result 158 states and 196 transitions. [2022-11-03 04:02:07,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:02:07,494 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-11-03 04:02:07,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:07,495 INFO L225 Difference]: With dead ends: 158 [2022-11-03 04:02:07,495 INFO L226 Difference]: Without dead ends: 0 [2022-11-03 04:02:07,496 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2022-11-03 04:02:07,497 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 102 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:07,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 133 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 04:02:07,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-03 04:02:07,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-03 04:02:07,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:07,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-03 04:02:07,499 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 63 [2022-11-03 04:02:07,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:07,499 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-03 04:02:07,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:07,500 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-03 04:02:07,500 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-03 04:02:07,503 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-03 04:02:07,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2022-11-03 04:02:07,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-03 04:02:07,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:02:07,919 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-11-03 04:02:09,039 INFO L899 garLoopResultBuilder]: For program point L151(line 151) no Hoare annotation was computed. [2022-11-03 04:02:09,040 INFO L899 garLoopResultBuilder]: For program point L151-2(line 151) no Hoare annotation was computed. [2022-11-03 04:02:09,040 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2022-11-03 04:02:09,040 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-11-03 04:02:09,040 INFO L899 garLoopResultBuilder]: For program point L20(line 20) no Hoare annotation was computed. [2022-11-03 04:02:09,040 INFO L899 garLoopResultBuilder]: For program point L20-1(line 20) no Hoare annotation was computed. [2022-11-03 04:02:09,040 INFO L899 garLoopResultBuilder]: For program point L20-3(line 20) no Hoare annotation was computed. [2022-11-03 04:02:09,040 INFO L899 garLoopResultBuilder]: For program point L136(line 136) no Hoare annotation was computed. [2022-11-03 04:02:09,041 INFO L899 garLoopResultBuilder]: For program point L136-2(line 136) no Hoare annotation was computed. [2022-11-03 04:02:09,041 INFO L899 garLoopResultBuilder]: For program point L128(line 128) no Hoare annotation was computed. [2022-11-03 04:02:09,041 INFO L899 garLoopResultBuilder]: For program point L128-2(line 128) no Hoare annotation was computed. [2022-11-03 04:02:09,041 INFO L899 garLoopResultBuilder]: For program point L120(line 120) no Hoare annotation was computed. [2022-11-03 04:02:09,041 INFO L899 garLoopResultBuilder]: For program point L120-2(line 120) no Hoare annotation was computed. [2022-11-03 04:02:09,042 INFO L899 garLoopResultBuilder]: For program point L145(line 145) no Hoare annotation was computed. [2022-11-03 04:02:09,042 INFO L899 garLoopResultBuilder]: For program point L145-2(line 145) no Hoare annotation was computed. [2022-11-03 04:02:09,042 INFO L899 garLoopResultBuilder]: For program point L113(line 113) no Hoare annotation was computed. [2022-11-03 04:02:09,042 INFO L899 garLoopResultBuilder]: For program point L113-2(line 113) no Hoare annotation was computed. [2022-11-03 04:02:09,042 INFO L895 garLoopResultBuilder]: At program point L163(lines 22 164) the Hoare annotation is: false [2022-11-03 04:02:09,043 INFO L899 garLoopResultBuilder]: For program point L155(line 155) no Hoare annotation was computed. [2022-11-03 04:02:09,043 INFO L899 garLoopResultBuilder]: For program point L155-2(line 155) no Hoare annotation was computed. [2022-11-03 04:02:09,043 INFO L899 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2022-11-03 04:02:09,043 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 20) no Hoare annotation was computed. [2022-11-03 04:02:09,044 INFO L895 garLoopResultBuilder]: At program point L57-2(lines 57 162) the Hoare annotation is: (let ((.cse7 ((_ zero_extend 24) |ULTIMATE.start_main_~mask_SORT_1~0#1|)) (.cse1 (= (_ bv0 8) |ULTIMATE.start_main_~state_11~0#1|)) (.cse6 (= (_ bv1 8) |ULTIMATE.start_main_~mask_SORT_1~0#1|)) (.cse8 (= |ULTIMATE.start_main_~var_58_arg_0~0#1| (_ bv0 8))) (.cse9 (= (_ bv0 8) |ULTIMATE.start_main_~var_56_arg_1~0#1|)) (.cse10 (= |ULTIMATE.start___VERIFIER_assert_~cond#1| (_ bv1 32))) (.cse11 (= |ULTIMATE.start_main_~var_10~0#1| (_ bv0 8))) (.cse12 (= |ULTIMATE.start_main_~var_52_arg_0~0#1| (_ bv0 8)))) (let ((.cse2 (let ((.cse13 (= (_ bv0 8) |ULTIMATE.start_main_~state_17~0#1|))) (or (and .cse6 .cse11 .cse13 .cse1) (and .cse6 .cse8 .cse9 .cse10 .cse11 .cse13 .cse12 (= |ULTIMATE.start_main_~next_57_arg_1~0#1| (_ bv0 8)))))) (.cse3 (= ((_ zero_extend 24) ((_ extract 7 0) (bvand ((_ zero_extend 24) ((_ extract 7 0) ((_ zero_extend 24) ((_ extract 7 0) ((_ zero_extend 24) ((_ extract 7 0) ((_ zero_extend 24) |ULTIMATE.start_main_~var_53_arg_2~0#1|))))))) .cse7))) ((_ zero_extend 24) ((_ extract 7 0) (bvand ((_ zero_extend 24) ((_ extract 7 0) ((_ zero_extend 24) ((_ extract 7 0) ((_ zero_extend 24) ((_ extract 7 0) ((_ zero_extend 24) ((_ extract 7 0) ((_ zero_extend 24) |ULTIMATE.start_main_~var_44~0#1|))))))))) .cse7))))) (.cse4 (= |ULTIMATE.start_main_~var_40_arg_1~0#1| (_ bv1 8))) (.cse0 (= (_ bv1 8) |ULTIMATE.start_main_~var_39~0#1|)) (.cse5 (= |ULTIMATE.start_main_~var_53_arg_0~0#1| |ULTIMATE.start_main_~var_46~0#1|))) (or (and .cse0 .cse1 .cse2) (and .cse3 .cse4 .cse0 .cse5 (not (= (_ bv0 8) |ULTIMATE.start_main_~var_56_arg_0~0#1|)) .cse2) (and .cse3 .cse6 (= ((_ zero_extend 24) ((_ extract 7 0) (bvand ((_ zero_extend 24) ((_ extract 7 0) ((_ zero_extend 24) ((_ extract 7 0) ((_ zero_extend 24) |ULTIMATE.start_main_~state_21~0#1|))))) .cse7))) ((_ zero_extend 24) ((_ extract 7 0) (bvand ((_ zero_extend 24) ((_ extract 7 0) ((_ zero_extend 24) ((_ extract 7 0) ((_ zero_extend 24) |ULTIMATE.start_main_~state_15~0#1|))))) .cse7)))) .cse8 .cse9 .cse10 .cse4 .cse0 (= |ULTIMATE.start_main_~var_59_arg_0~0#1| (_ bv0 8)) .cse11 .cse5 .cse12 (= |ULTIMATE.start_main_~var_46~0#1| (_ bv0 8)))))) [2022-11-03 04:02:09,044 INFO L899 garLoopResultBuilder]: For program point L57-3(lines 57 162) no Hoare annotation was computed. [2022-11-03 04:02:09,044 INFO L899 garLoopResultBuilder]: For program point L82(line 82) no Hoare annotation was computed. [2022-11-03 04:02:09,044 INFO L899 garLoopResultBuilder]: For program point L82-2(line 82) no Hoare annotation was computed. [2022-11-03 04:02:09,045 INFO L899 garLoopResultBuilder]: For program point L132(line 132) no Hoare annotation was computed. [2022-11-03 04:02:09,045 INFO L899 garLoopResultBuilder]: For program point L132-2(line 132) no Hoare annotation was computed. [2022-11-03 04:02:09,045 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-11-03 04:02:09,045 INFO L899 garLoopResultBuilder]: For program point L124(line 124) no Hoare annotation was computed. [2022-11-03 04:02:09,045 INFO L899 garLoopResultBuilder]: For program point L124-2(line 124) no Hoare annotation was computed. [2022-11-03 04:02:09,045 INFO L899 garLoopResultBuilder]: For program point L141(line 141) no Hoare annotation was computed. [2022-11-03 04:02:09,046 INFO L899 garLoopResultBuilder]: For program point L75(line 75) no Hoare annotation was computed. [2022-11-03 04:02:09,046 INFO L899 garLoopResultBuilder]: For program point L141-2(line 141) no Hoare annotation was computed. [2022-11-03 04:02:09,046 INFO L899 garLoopResultBuilder]: For program point L75-2(line 75) no Hoare annotation was computed. [2022-11-03 04:02:09,050 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:02:09,053 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-03 04:02:09,084 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 04:02:09 BoogieIcfgContainer [2022-11-03 04:02:09,095 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-03 04:02:09,096 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-03 04:02:09,096 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-03 04:02:09,096 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-03 04:02:09,097 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:01:35" (3/4) ... [2022-11-03 04:02:09,100 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-11-03 04:02:09,119 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2022-11-03 04:02:09,120 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2022-11-03 04:02:09,120 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-11-03 04:02:09,173 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.witnessprinter has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSLBacktranslationValueProvider.getStringFromIASTNode(CACSLBacktranslationValueProvider.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSLBacktranslationValueProvider.getStringFromStep(CACSLBacktranslationValueProvider.java:59) at de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSLBacktranslationValueProvider.getStringFromStep(CACSLBacktranslationValueProvider.java:1) at de.uni_freiburg.informatik.ultimate.witnessprinter.graphml.GeneratedWitnessEdge.getSourceCode(GeneratedWitnessEdge.java:153) at de.uni_freiburg.informatik.ultimate.witnessprinter.CorrectnessWitnessGenerator.lambda$2(CorrectnessWitnessGenerator.java:95) at edu.uci.ics.jung.io.GraphMLWriter.writeEdgeData(GraphMLWriter.java:237) at de.uni_freiburg.informatik.ultimate.witnessprinter.graphml.UltimateGraphMLWriter.save(UltimateGraphMLWriter.java:106) at de.uni_freiburg.informatik.ultimate.witnessprinter.CorrectnessWitnessGenerator.makeGraphMLString(CorrectnessWitnessGenerator.java:115) at de.uni_freiburg.informatik.ultimate.witnessprinter.WitnessPrinter.generateProofWitness(WitnessPrinter.java:158) at de.uni_freiburg.informatik.ultimate.witnessprinter.WitnessPrinter.finish(WitnessPrinter.java:138) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:131) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-03 04:02:09,178 INFO L158 Benchmark]: Toolchain (without parser) took 35194.88ms. Allocated memory was 77.6MB in the beginning and 159.4MB in the end (delta: 81.8MB). Free memory was 57.1MB in the beginning and 116.2MB in the end (delta: -59.1MB). Peak memory consumption was 21.9MB. Max. memory is 16.1GB. [2022-11-03 04:02:09,179 INFO L158 Benchmark]: CDTParser took 0.36ms. Allocated memory is still 54.5MB. Free memory is still 35.0MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 04:02:09,179 INFO L158 Benchmark]: CACSL2BoogieTranslator took 407.06ms. Allocated memory is still 77.6MB. Free memory was 56.9MB in the beginning and 59.7MB in the end (delta: -2.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-03 04:02:09,180 INFO L158 Benchmark]: Boogie Procedure Inliner took 55.09ms. Allocated memory is still 77.6MB. Free memory was 59.7MB in the beginning and 57.4MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 04:02:09,180 INFO L158 Benchmark]: Boogie Preprocessor took 40.16ms. Allocated memory is still 77.6MB. Free memory was 57.4MB in the beginning and 55.6MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 04:02:09,180 INFO L158 Benchmark]: RCFGBuilder took 831.59ms. Allocated memory is still 77.6MB. Free memory was 55.6MB in the beginning and 38.5MB in the end (delta: 17.1MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2022-11-03 04:02:09,181 INFO L158 Benchmark]: TraceAbstraction took 33771.69ms. Allocated memory was 77.6MB in the beginning and 159.4MB in the end (delta: 81.8MB). Free memory was 37.9MB in the beginning and 119.3MB in the end (delta: -81.4MB). Peak memory consumption was 79.6MB. Max. memory is 16.1GB. [2022-11-03 04:02:09,181 INFO L158 Benchmark]: Witness Printer took 81.80ms. Allocated memory is still 159.4MB. Free memory was 119.3MB in the beginning and 116.2MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-03 04:02:09,184 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36ms. Allocated memory is still 54.5MB. Free memory is still 35.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 407.06ms. Allocated memory is still 77.6MB. Free memory was 56.9MB in the beginning and 59.7MB in the end (delta: -2.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 55.09ms. Allocated memory is still 77.6MB. Free memory was 59.7MB in the beginning and 57.4MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 40.16ms. Allocated memory is still 77.6MB. Free memory was 57.4MB in the beginning and 55.6MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 831.59ms. Allocated memory is still 77.6MB. Free memory was 55.6MB in the beginning and 38.5MB in the end (delta: 17.1MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 33771.69ms. Allocated memory was 77.6MB in the beginning and 159.4MB in the end (delta: 81.8MB). Free memory was 37.9MB in the beginning and 119.3MB in the end (delta: -81.4MB). Peak memory consumption was 79.6MB. Max. memory is 16.1GB. * Witness Printer took 81.80ms. Allocated memory is still 159.4MB. Free memory was 119.3MB in the beginning and 116.2MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. 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 - PositiveResult [Line: 20]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 35 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 33.6s, OverallIterations: 13, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.1s, AutomataDifference: 12.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2088 SdHoareTripleChecker+Valid, 1.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2088 mSDsluCounter, 3285 SdHoareTripleChecker+Invalid, 1.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 997 IncrementalHoareTripleChecker+Unchecked, 2594 mSDsCounter, 88 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1199 IncrementalHoareTripleChecker+Invalid, 2284 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 88 mSolverCounterUnsat, 691 mSDtfsCounter, 1199 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1712 GetRequests, 1470 SyntacticMatches, 6 SemanticMatches, 236 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2782 ImplicationChecksByTransitivity, 14.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=72occurred in iteration=11, InterpolantAutomatonStates: 165, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 13 MinimizatonAttempts, 605 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 7 NumberOfFragments, 216 HoareAnnotationTreeSize, 2 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.3s HoareSimplificationTime, 2 FomulaSimplificationsInter, 20331 FormulaSimplificationTreeSizeReductionInter, 0.9s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.9s SsaConstructionTime, 1.5s SatisfiabilityAnalysisTime, 11.4s InterpolantComputationTime, 990 NumberOfCodeBlocks, 990 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 1584 ConstructedInterpolants, 276 QuantifiedInterpolants, 14401 SizeOfPredicates, 274 NumberOfNonLiveVariables, 4773 ConjunctsInSsa, 340 ConjunctsInUnsatCore, 36 InterpolantComputations, 10 PerfectInterpolantSequences, 456/693 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 57]: Loop Invariant Derived loop invariant: (((1bv8 == var_39 && 0bv8 == state_11) && ((((1bv8 == mask_SORT_1 && var_10 == 0bv8) && 0bv8 == state_17) && 0bv8 == state_11) || (((((((1bv8 == mask_SORT_1 && var_58_arg_0 == 0bv8) && 0bv8 == var_56_arg_1) && cond == 1bv32) && var_10 == 0bv8) && 0bv8 == state_17) && var_52_arg_0 == 0bv8) && next_57_arg_1 == 0bv8))) || (((((~zero_extendFrom8To32(~bvand32(~zero_extendFrom8To32(~zero_extendFrom8To32(~zero_extendFrom8To32(~zero_extendFrom8To32(var_53_arg_2)[7:0])[7:0])[7:0]), ~zero_extendFrom8To32(mask_SORT_1))[7:0]) == ~zero_extendFrom8To32(~bvand32(~zero_extendFrom8To32(~zero_extendFrom8To32(~zero_extendFrom8To32(~zero_extendFrom8To32(~zero_extendFrom8To32(var_44)[7:0])[7:0])[7:0])[7:0]), ~zero_extendFrom8To32(mask_SORT_1))[7:0]) && var_40_arg_1 == 1bv8) && 1bv8 == var_39) && var_53_arg_0 == var_46) && !(0bv8 == var_56_arg_0)) && ((((1bv8 == mask_SORT_1 && var_10 == 0bv8) && 0bv8 == state_17) && 0bv8 == state_11) || (((((((1bv8 == mask_SORT_1 && var_58_arg_0 == 0bv8) && 0bv8 == var_56_arg_1) && cond == 1bv32) && var_10 == 0bv8) && 0bv8 == state_17) && var_52_arg_0 == 0bv8) && next_57_arg_1 == 0bv8)))) || ((((((((((((~zero_extendFrom8To32(~bvand32(~zero_extendFrom8To32(~zero_extendFrom8To32(~zero_extendFrom8To32(~zero_extendFrom8To32(var_53_arg_2)[7:0])[7:0])[7:0]), ~zero_extendFrom8To32(mask_SORT_1))[7:0]) == ~zero_extendFrom8To32(~bvand32(~zero_extendFrom8To32(~zero_extendFrom8To32(~zero_extendFrom8To32(~zero_extendFrom8To32(~zero_extendFrom8To32(var_44)[7:0])[7:0])[7:0])[7:0]), ~zero_extendFrom8To32(mask_SORT_1))[7:0]) && 1bv8 == mask_SORT_1) && ~zero_extendFrom8To32(~bvand32(~zero_extendFrom8To32(~zero_extendFrom8To32(~zero_extendFrom8To32(state_21)[7:0])[7:0]), ~zero_extendFrom8To32(mask_SORT_1))[7:0]) == ~zero_extendFrom8To32(~bvand32(~zero_extendFrom8To32(~zero_extendFrom8To32(~zero_extendFrom8To32(state_15)[7:0])[7:0]), ~zero_extendFrom8To32(mask_SORT_1))[7:0])) && var_58_arg_0 == 0bv8) && 0bv8 == var_56_arg_1) && cond == 1bv32) && var_40_arg_1 == 1bv8) && 1bv8 == var_39) && var_59_arg_0 == 0bv8) && var_10 == 0bv8) && var_53_arg_0 == var_46) && var_52_arg_0 == 0bv8) && var_46 == 0bv8) * Results from de.uni_freiburg.informatik.ultimate.witnessprinter: - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.witnessprinter: NullPointerException: null: de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSLBacktranslationValueProvider.getStringFromIASTNode(CACSLBacktranslationValueProvider.java:78) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-11-03 04:02:09,263 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64a46fc-b961-4f9d-9348-69c2b8cb4189/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: NullPointerException: null