./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67812669-c12f-4809-a31a-8c15ec38057b/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67812669-c12f-4809-a31a-8c15ec38057b/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67812669-c12f-4809-a31a-8c15ec38057b/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67812669-c12f-4809-a31a-8c15ec38057b/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67812669-c12f-4809-a31a-8c15ec38057b/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67812669-c12f-4809-a31a-8c15ec38057b/bin/utaipan-gh47qXpMRh --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 32bit --witnessprinter.graph.data.programhash a7eb970df9460734baa401f9be0d88efb243a90e1dffe6744cd9f9a47afa0217 --- 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-2329fc7 [2022-12-14 04:58:57,031 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 04:58:57,033 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 04:58:57,051 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 04:58:57,052 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 04:58:57,053 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 04:58:57,054 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 04:58:57,055 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 04:58:57,056 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 04:58:57,057 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 04:58:57,058 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 04:58:57,059 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 04:58:57,059 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 04:58:57,060 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 04:58:57,061 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 04:58:57,062 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 04:58:57,063 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 04:58:57,064 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 04:58:57,065 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 04:58:57,067 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 04:58:57,068 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 04:58:57,069 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 04:58:57,070 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 04:58:57,071 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 04:58:57,074 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 04:58:57,074 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 04:58:57,075 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 04:58:57,076 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 04:58:57,076 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 04:58:57,077 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 04:58:57,077 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 04:58:57,078 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 04:58:57,079 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 04:58:57,079 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 04:58:57,080 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 04:58:57,080 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 04:58:57,081 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 04:58:57,081 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 04:58:57,081 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 04:58:57,082 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 04:58:57,083 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 04:58:57,083 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67812669-c12f-4809-a31a-8c15ec38057b/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 04:58:57,103 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 04:58:57,104 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 04:58:57,104 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 04:58:57,104 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 04:58:57,105 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 04:58:57,105 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 04:58:57,105 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 04:58:57,105 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 04:58:57,105 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 04:58:57,106 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 04:58:57,110 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 04:58:57,111 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 04:58:57,111 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 04:58:57,111 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 04:58:57,111 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 04:58:57,111 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 04:58:57,112 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 04:58:57,112 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 04:58:57,113 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 04:58:57,113 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 04:58:57,113 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 04:58:57,113 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 04:58:57,113 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 04:58:57,113 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 04:58:57,114 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 04:58:57,114 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 04:58:57,114 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 04:58:57,114 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 04:58:57,114 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 04:58:57,115 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 04:58:57,115 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 04:58:57,115 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 04:58:57,115 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 04:58:57,115 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 04:58:57,116 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 04:58:57,116 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 04:58:57,116 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 04:58:57,116 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 04:58:57,116 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 04:58:57,116 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 04:58:57,117 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 04:58:57,117 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_67812669-c12f-4809-a31a-8c15ec38057b/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67812669-c12f-4809-a31a-8c15ec38057b/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a7eb970df9460734baa401f9be0d88efb243a90e1dffe6744cd9f9a47afa0217 [2022-12-14 04:58:57,312 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 04:58:57,328 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 04:58:57,331 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 04:58:57,332 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 04:58:57,332 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 04:58:57,333 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67812669-c12f-4809-a31a-8c15ec38057b/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c [2022-12-14 04:59:00,016 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 04:59:00,181 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 04:59:00,181 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67812669-c12f-4809-a31a-8c15ec38057b/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c [2022-12-14 04:59:00,186 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67812669-c12f-4809-a31a-8c15ec38057b/bin/utaipan-gh47qXpMRh/data/7cf79f34f/b3bb535be8284a07a053b13ab97a6f47/FLAG73fa5ea07 [2022-12-14 04:59:00,197 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67812669-c12f-4809-a31a-8c15ec38057b/bin/utaipan-gh47qXpMRh/data/7cf79f34f/b3bb535be8284a07a053b13ab97a6f47 [2022-12-14 04:59:00,199 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 04:59:00,200 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 04:59:00,201 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 04:59:00,201 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 04:59:00,204 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 04:59:00,204 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:59:00" (1/1) ... [2022-12-14 04:59:00,205 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24f2dcae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:59:00, skipping insertion in model container [2022-12-14 04:59:00,205 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:59:00" (1/1) ... [2022-12-14 04:59:00,210 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 04:59:00,226 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 04:59:00,354 WARN L237 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_67812669-c12f-4809-a31a-8c15ec38057b/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c[6691,6704] [2022-12-14 04:59:00,357 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 04:59:00,365 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 04:59:00,391 WARN L237 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_67812669-c12f-4809-a31a-8c15ec38057b/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c[6691,6704] [2022-12-14 04:59:00,391 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 04:59:00,401 INFO L208 MainTranslator]: Completed translation [2022-12-14 04:59:00,402 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:59:00 WrapperNode [2022-12-14 04:59:00,402 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 04:59:00,402 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 04:59:00,403 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 04:59:00,403 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 04:59:00,408 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:59:00" (1/1) ... [2022-12-14 04:59:00,414 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:59:00" (1/1) ... [2022-12-14 04:59:00,431 INFO L138 Inliner]: procedures = 21, calls = 13, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 226 [2022-12-14 04:59:00,432 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 04:59:00,432 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 04:59:00,432 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 04:59:00,432 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 04:59:00,439 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:59:00" (1/1) ... [2022-12-14 04:59:00,440 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:59:00" (1/1) ... [2022-12-14 04:59:00,441 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:59:00" (1/1) ... [2022-12-14 04:59:00,441 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:59:00" (1/1) ... [2022-12-14 04:59:00,445 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:59:00" (1/1) ... [2022-12-14 04:59:00,448 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:59:00" (1/1) ... [2022-12-14 04:59:00,449 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:59:00" (1/1) ... [2022-12-14 04:59:00,450 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:59:00" (1/1) ... [2022-12-14 04:59:00,452 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 04:59:00,453 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 04:59:00,453 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 04:59:00,453 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 04:59:00,453 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:59:00" (1/1) ... [2022-12-14 04:59:00,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 04:59:00,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67812669-c12f-4809-a31a-8c15ec38057b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:59:00,476 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67812669-c12f-4809-a31a-8c15ec38057b/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 04:59:00,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67812669-c12f-4809-a31a-8c15ec38057b/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 04:59:00,511 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 04:59:00,511 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 04:59:00,511 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 04:59:00,512 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 04:59:00,577 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 04:59:00,578 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 04:59:00,830 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 04:59:01,093 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 04:59:01,093 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 04:59:01,095 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:59:01 BoogieIcfgContainer [2022-12-14 04:59:01,095 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 04:59:01,098 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 04:59:01,098 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 04:59:01,100 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 04:59:01,100 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 04:59:00" (1/3) ... [2022-12-14 04:59:01,101 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60c4cc3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:59:01, skipping insertion in model container [2022-12-14 04:59:01,101 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:59:00" (2/3) ... [2022-12-14 04:59:01,101 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60c4cc3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:59:01, skipping insertion in model container [2022-12-14 04:59:01,102 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:59:01" (3/3) ... [2022-12-14 04:59:01,103 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c [2022-12-14 04:59:01,119 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 04:59:01,119 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 04:59:01,158 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 04:59:01,164 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;@31614c85, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 04:59:01,164 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 04:59:01,167 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) [2022-12-14 04:59:01,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-12-14 04:59:01,172 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:59:01,172 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-12-14 04:59:01,173 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:59:01,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:59:01,177 INFO L85 PathProgramCache]: Analyzing trace with hash 12685289, now seen corresponding path program 1 times [2022-12-14 04:59:01,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:59:01,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886664578] [2022-12-14 04:59:01,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:59:01,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:59:01,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:59:02,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:59:02,046 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:59:02,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886664578] [2022-12-14 04:59:02,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886664578] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:59:02,047 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 04:59:02,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 04:59:02,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789078751] [2022-12-14 04:59:02,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:59:02,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 04:59:02,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:59:02,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 04:59:02,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 04:59:02,074 INFO L87 Difference]: Start difference. First 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) Second operand has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 04:59:02,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:59:02,124 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2022-12-14 04:59:02,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 04:59:02,126 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 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 4 [2022-12-14 04:59:02,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:59:02,131 INFO L225 Difference]: With dead ends: 19 [2022-12-14 04:59:02,131 INFO L226 Difference]: Without dead ends: 10 [2022-12-14 04:59:02,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 04:59:02,135 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 4 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 04:59:02,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 8 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 04:59:02,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2022-12-14 04:59:02,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 8. [2022-12-14 04:59:02,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 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) [2022-12-14 04:59:02,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2022-12-14 04:59:02,156 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 4 [2022-12-14 04:59:02,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:59:02,156 INFO L495 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2022-12-14 04:59:02,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 04:59:02,157 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2022-12-14 04:59:02,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 04:59:02,157 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:59:02,157 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2022-12-14 04:59:02,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 04:59:02,158 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:59:02,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:59:02,158 INFO L85 PathProgramCache]: Analyzing trace with hash -44529283, now seen corresponding path program 1 times [2022-12-14 04:59:02,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:59:02,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630144257] [2022-12-14 04:59:02,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:59:02,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:59:02,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:59:03,874 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:59:03,874 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:59:03,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630144257] [2022-12-14 04:59:03,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630144257] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:59:03,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457370956] [2022-12-14 04:59:03,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:59:03,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:59:03,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67812669-c12f-4809-a31a-8c15ec38057b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:59:03,876 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67812669-c12f-4809-a31a-8c15ec38057b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:59:03,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67812669-c12f-4809-a31a-8c15ec38057b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 04:59:04,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:59:04,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 37 conjunts are in the unsatisfiable core [2022-12-14 04:59:04,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:59:07,188 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:59:07,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:11:01,833 WARN L233 SmtUtils]: Spent 34.92s on a formula simplification. DAG size of input: 1905 DAG size of output: 1896 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:11:01,844 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:11:01,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457370956] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:11:01,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [337587895] [2022-12-14 05:11:01,862 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-12-14 05:11:01,862 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:11:01,865 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:11:01,875 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:11:01,875 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:11:15,333 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:11:23,778 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '98#(and (<= 0 ~id3~0) (= ~nomsg~0 ~p1_new~0) (or (and (= ~nomsg~0 |ULTIMATE.start_node1_~m1~0#1|) (<= 0 ~st1~0) (= ~mode1~0 1) (or (and (<= 0 (+ ~p1_old~0 1)) (= (mod ~alive1~0 256) 0) (<= (+ ~p1_old~0 1) 0)) (and (exists ((v_~p1_new~0_64 Int)) (and (<= 0 (+ v_~p1_new~0_64 1)) (<= (+ v_~p1_new~0_64 1) 0) (= (ite (<= (mod (ite (and (= ~nomsg~0 v_~p1_new~0_64) (not (= ~send1~0 ~nomsg~0))) ~send1~0 v_~p1_new~0_64) 256) 127) (mod (ite (and (= ~nomsg~0 v_~p1_new~0_64) (not (= ~send1~0 ~nomsg~0))) ~send1~0 v_~p1_new~0_64) 256) (+ (mod (ite (and (= ~nomsg~0 v_~p1_new~0_64) (not (= ~send1~0 ~nomsg~0))) ~send1~0 v_~p1_new~0_64) 256) (- 256))) ~p1_old~0))) (not (= (mod ~alive1~0 256) 0))))) (and (<= 0 (+ ~p1_old~0 1)) (exists ((v_~r1~0_54 Int)) (= ~r1~0 (ite (<= (mod (+ v_~r1~0_54 1) 256) 127) (mod (+ v_~r1~0_54 1) 256) (+ (- 256) (mod (+ v_~r1~0_54 1) 256))))) (= ~mode1~0 0) (or (and (= ~nomsg~0 |ULTIMATE.start_node1_~m1~0#1|) (<= 0 ~st1~0)) (and (or (and (not (< ~id1~0 |ULTIMATE.start_node1_~m1~0#1|)) (or (= ~st1~0 1) (and (not (= ~id1~0 |ULTIMATE.start_node1_~m1~0#1|)) (<= 0 ~st1~0)))) (and (<= 0 ~st1~0) (= ~send1~0 |ULTIMATE.start_node1_~m1~0#1|) (< ~id1~0 |ULTIMATE.start_node1_~m1~0#1|))) (not (= (mod ~alive1~0 256) 0))) (and (<= 0 ~st1~0) (= ~send1~0 |ULTIMATE.start_node1_~m1~0#1|) (= (mod ~alive1~0 256) 0))) (<= (+ ~p1_old~0 1) 0))) (<= 1 |ULTIMATE.start_init_~tmp~0#1|) (<= 0 ~id1~0) (or (and (= ~mode3~0 1) (or (and (or (and (= ~send3~0 ~id3~0) (<= 0 (+ ~p3_old~0 1)) (<= (+ ~p3_old~0 1) 0)) (and (exists ((v_~p3_new~0_58 Int)) (and (= ~p3_old~0 (ite (<= (mod (ite (and (not (= ~send3~0 ~nomsg~0)) (= v_~p3_new~0_58 ~nomsg~0)) ~send3~0 v_~p3_new~0_58) 256) 127) (mod (ite (and (not (= ~send3~0 ~nomsg~0)) (= v_~p3_new~0_58 ~nomsg~0)) ~send3~0 v_~p3_new~0_58) 256) (+ (- 256) (mod (ite (and (not (= ~send3~0 ~nomsg~0)) (= v_~p3_new~0_58 ~nomsg~0)) ~send3~0 v_~p3_new~0_58) 256)))) (<= 0 (+ v_~p3_new~0_58 1)) (<= (+ v_~p3_new~0_58 1) 0))) (not (= ~send3~0 ~id3~0)))) (= (mod ~alive3~0 256) 0)) (and (not (= (mod ~alive3~0 256) 0)) (exists ((v_~p3_new~0_58 Int)) (and (= ~p3_old~0 (ite (<= (mod (ite (and (not (= ~send3~0 ~nomsg~0)) (= v_~p3_new~0_58 ~nomsg~0)) ~send3~0 v_~p3_new~0_58) 256) 127) (mod (ite (and (not (= ~send3~0 ~nomsg~0)) (= v_~p3_new~0_58 ~nomsg~0)) ~send3~0 v_~p3_new~0_58) 256) (+ (- 256) (mod (ite (and (not (= ~send3~0 ~nomsg~0)) (= v_~p3_new~0_58 ~nomsg~0)) ~send3~0 v_~p3_new~0_58) 256)))) (<= 0 (+ v_~p3_new~0_58 1)) (<= (+ v_~p3_new~0_58 1) 0))))) (= ~nomsg~0 |ULTIMATE.start_node3_~m3~0#1|) (<= 0 ~st3~0)) (and (or (and (not (= (mod ~alive3~0 256) 0)) (or (and (< ~id3~0 |ULTIMATE.start_node3_~m3~0#1|) (= ~send3~0 |ULTIMATE.start_node3_~m3~0#1|) (<= 0 ~st3~0)) (and (not (< ~id3~0 |ULTIMATE.start_node3_~m3~0#1|)) (or (= ~st3~0 1) (and (<= 0 ~st3~0) (not (= ~id3~0 |ULTIMATE.start_node3_~m3~0#1|))))))) (and (= ~nomsg~0 |ULTIMATE.start_node3_~m3~0#1|) (<= 0 ~st3~0)) (and (= ~send3~0 |ULTIMATE.start_node3_~m3~0#1|) (<= 0 ~st3~0) (= (mod ~alive3~0 256) 0))) (<= 0 (+ ~p3_old~0 1)) (<= (+ ~p3_old~0 1) 0) (= ~mode3~0 0))) (or (and (= ~mode2~0 1) (<= 0 ~st2~0) (or (and (exists ((v_~p2_new~0_62 Int)) (and (= (ite (<= (mod (ite (and (not (= ~send2~0 ~nomsg~0)) (= v_~p2_new~0_62 ~nomsg~0)) ~send2~0 v_~p2_new~0_62) 256) 127) (mod (ite (and (not (= ~send2~0 ~nomsg~0)) (= v_~p2_new~0_62 ~nomsg~0)) ~send2~0 v_~p2_new~0_62) 256) (+ (- 256) (mod (ite (and (not (= ~send2~0 ~nomsg~0)) (= v_~p2_new~0_62 ~nomsg~0)) ~send2~0 v_~p2_new~0_62) 256))) ~p2_old~0) (<= 0 (+ v_~p2_new~0_62 1)) (<= (+ v_~p2_new~0_62 1) 0))) (not (= (mod ~alive2~0 256) 0))) (and (or (and (<= 0 (+ ~p2_old~0 1)) (<= (+ ~p2_old~0 1) 0) (= ~send2~0 ~id2~0)) (and (exists ((v_~p2_new~0_62 Int)) (and (= (ite (<= (mod (ite (and (not (= ~send2~0 ~nomsg~0)) (= v_~p2_new~0_62 ~nomsg~0)) ~send2~0 v_~p2_new~0_62) 256) 127) (mod (ite (and (not (= ~send2~0 ~nomsg~0)) (= v_~p2_new~0_62 ~nomsg~0)) ~send2~0 v_~p2_new~0_62) 256) (+ (- 256) (mod (ite (and (not (= ~send2~0 ~nomsg~0)) (= v_~p2_new~0_62 ~nomsg~0)) ~send2~0 v_~p2_new~0_62) 256))) ~p2_old~0) (<= 0 (+ v_~p2_new~0_62 1)) (<= (+ v_~p2_new~0_62 1) 0))) (not (= ~send2~0 ~id2~0)))) (= (mod ~alive2~0 256) 0))) (= ~nomsg~0 |ULTIMATE.start_node2_~m2~0#1|)) (and (= ~mode2~0 0) (or (and (<= 0 ~st2~0) (= ~send2~0 |ULTIMATE.start_node2_~m2~0#1|) (= (mod ~alive2~0 256) 0)) (and (or (and (<= 0 ~st2~0) (= ~send2~0 |ULTIMATE.start_node2_~m2~0#1|) (< ~id2~0 |ULTIMATE.start_node2_~m2~0#1|)) (and (or (= ~st2~0 1) (and (not (= |ULTIMATE.start_node2_~m2~0#1| ~id2~0)) (<= 0 ~st2~0))) (not (< ~id2~0 |ULTIMATE.start_node2_~m2~0#1|)))) (not (= (mod ~alive2~0 256) 0))) (and (<= 0 ~st2~0) (= ~nomsg~0 |ULTIMATE.start_node2_~m2~0#1|))) (<= 0 (+ ~p2_old~0 1)) (<= (+ ~p2_old~0 1) 0))) (<= 0 |ULTIMATE.start_main_~i2~0#1|) (= ~p2~0 0) (<= |ULTIMATE.start_init_~tmp~0#1| 1) (= (mod |ULTIMATE.start_assert_~arg#1| 256) 0) (= ~p3_new~0 ~nomsg~0) (<= |ULTIMATE.start_init_#res#1| 1) (or (not (<= (+ ~st3~0 ~st2~0 ~st1~0) 1)) (and (not (< ~r1~0 3)) (not (= (+ ~st3~0 ~st2~0 ~st1~0) 1)))) (<= ~id1~0 127) (= ~nomsg~0 ~p2_new~0) (<= (+ ~nomsg~0 1) 0) (<= 1 |ULTIMATE.start_init_#res#1|) (< |ULTIMATE.start_main_~i2~0#1| 6) (<= ~id3~0 127) (<= 0 ~id2~0) (= |#NULL.offset| 0) (<= 0 (+ ~nomsg~0 1)) (= |ULTIMATE.start_check_~tmp~1#1| |ULTIMATE.start_check_#res#1|) (<= ~id2~0 127) (= |ULTIMATE.start_assert_#in~arg#1| |ULTIMATE.start_assert_~arg#1|) (= |ULTIMATE.start_main_~c1~0#1| |ULTIMATE.start_check_#res#1|) (= ~p3~0 0) (= ~p1~0 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= |ULTIMATE.start_assert_#in~arg#1| (ite (= |ULTIMATE.start_main_~c1~0#1| 0) 0 1)))' at error location [2022-12-14 05:11:23,778 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:11:23,779 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:11:23,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 12 [2022-12-14 05:11:23,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922715322] [2022-12-14 05:11:23,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:11:23,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 05:11:23,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:11:23,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 05:11:23,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2022-12-14 05:11:23,782 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:11:24,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:11:24,545 INFO L93 Difference]: Finished difference Result 18 states and 19 transitions. [2022-12-14 05:11:24,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 05:11:24,546 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 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 7 [2022-12-14 05:11:24,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:11:24,546 INFO L225 Difference]: With dead ends: 18 [2022-12-14 05:11:24,546 INFO L226 Difference]: Without dead ends: 16 [2022-12-14 05:11:24,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 46.1s TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2022-12-14 05:11:24,547 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 10 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 05:11:24,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 25 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 05:11:24,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-12-14 05:11:24,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 14. [2022-12-14 05:11:24,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 13 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:11:24,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2022-12-14 05:11:24,552 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 7 [2022-12-14 05:11:24,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:11:24,552 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2022-12-14 05:11:24,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:11:24,552 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2022-12-14 05:11:24,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 05:11:24,552 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:11:24,553 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1] [2022-12-14 05:11:24,562 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67812669-c12f-4809-a31a-8c15ec38057b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 05:11:24,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67812669-c12f-4809-a31a-8c15ec38057b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:11:24,755 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:11:24,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:11:24,757 INFO L85 PathProgramCache]: Analyzing trace with hash 1531490813, now seen corresponding path program 2 times [2022-12-14 05:11:24,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:11:24,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836401813] [2022-12-14 05:11:24,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:11:24,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:11:24,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:11:42,468 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:11:42,468 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:11:42,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836401813] [2022-12-14 05:11:42,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836401813] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:11:42,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106311524] [2022-12-14 05:11:42,468 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 05:11:42,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:11:42,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67812669-c12f-4809-a31a-8c15ec38057b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:11:42,469 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67812669-c12f-4809-a31a-8c15ec38057b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:11:42,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67812669-c12f-4809-a31a-8c15ec38057b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 05:11:42,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 05:11:42,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:11:42,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 66 conjunts are in the unsatisfiable core [2022-12-14 05:11:42,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:11:49,674 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:11:49,674 INFO L328 TraceCheckSpWp]: Computing backward predicates...