./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 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6a8aafb-c878-4315-a375-c5e435d961e3/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6a8aafb-c878-4315-a375-c5e435d961e3/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_f6a8aafb-c878-4315-a375-c5e435d961e3/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6a8aafb-c878-4315-a375-c5e435d961e3/bin/utaipan-7li7fVZpFI/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_f6a8aafb-c878-4315-a375-c5e435d961e3/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6a8aafb-c878-4315-a375-c5e435d961e3/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 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-5e519f3 [2022-11-03 03:45:25,868 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:45:25,871 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:45:25,930 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:45:25,931 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:45:25,932 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:45:25,933 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:45:25,935 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:45:25,940 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:45:25,944 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:45:25,945 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:45:25,946 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:45:25,949 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:45:25,952 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:45:25,957 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:45:25,958 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:45:25,959 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:45:25,963 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:45:25,964 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:45:25,966 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:45:25,971 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:45:25,974 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:45:25,979 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:45:25,981 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:45:25,984 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:45:25,988 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:45:25,988 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:45:25,990 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:45:25,993 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:45:25,994 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:45:25,994 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:45:25,995 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:45:25,997 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:45:25,998 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:45:26,000 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:45:26,001 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:45:26,003 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:45:26,008 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:45:26,008 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:45:26,009 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:45:26,010 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:45:26,011 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6a8aafb-c878-4315-a375-c5e435d961e3/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 03:45:26,032 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:45:26,032 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:45:26,032 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:45:26,033 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:45:26,033 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:45:26,033 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:45:26,034 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:45:26,034 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:45:26,034 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:45:26,034 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 03:45:26,035 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:45:26,035 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:45:26,035 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 03:45:26,035 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 03:45:26,035 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:45:26,036 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 03:45:26,036 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 03:45:26,036 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 03:45:26,037 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:45:26,037 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 03:45:26,037 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 03:45:26,038 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 03:45:26,038 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:45:26,038 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 03:45:26,038 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:45:26,038 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 03:45:26,039 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 03:45:26,039 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 03:45:26,039 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:45:26,039 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 03:45:26,040 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:45:26,040 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:45:26,040 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:45:26,040 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:45:26,040 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 03:45:26,041 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:45:26,041 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 03:45:26,041 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 03:45:26,041 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 03:45:26,042 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 03:45:26,042 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:45:26,042 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_f6a8aafb-c878-4315-a375-c5e435d961e3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6a8aafb-c878-4315-a375-c5e435d961e3/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a7eb970df9460734baa401f9be0d88efb243a90e1dffe6744cd9f9a47afa0217 [2022-11-03 03:45:26,358 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:45:26,398 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:45:26,402 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:45:26,403 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:45:26,404 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:45:26,405 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6a8aafb-c878-4315-a375-c5e435d961e3/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c [2022-11-03 03:45:26,464 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6a8aafb-c878-4315-a375-c5e435d961e3/bin/utaipan-7li7fVZpFI/data/b2456c825/8c15c2b6af4d4d7fa743cd3001deaed9/FLAG223e4f66e [2022-11-03 03:45:27,031 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:45:27,032 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6a8aafb-c878-4315-a375-c5e435d961e3/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c [2022-11-03 03:45:27,044 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6a8aafb-c878-4315-a375-c5e435d961e3/bin/utaipan-7li7fVZpFI/data/b2456c825/8c15c2b6af4d4d7fa743cd3001deaed9/FLAG223e4f66e [2022-11-03 03:45:27,376 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6a8aafb-c878-4315-a375-c5e435d961e3/bin/utaipan-7li7fVZpFI/data/b2456c825/8c15c2b6af4d4d7fa743cd3001deaed9 [2022-11-03 03:45:27,378 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:45:27,380 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:45:27,382 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:45:27,382 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:45:27,387 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:45:27,388 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:45:27" (1/1) ... [2022-11-03 03:45:27,390 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7db507b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:45:27, skipping insertion in model container [2022-11-03 03:45:27,391 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:45:27" (1/1) ... [2022-11-03 03:45:27,400 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:45:27,427 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:45:27,731 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_f6a8aafb-c878-4315-a375-c5e435d961e3/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c[6691,6704] [2022-11-03 03:45:27,733 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:45:27,748 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:45:27,785 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_f6a8aafb-c878-4315-a375-c5e435d961e3/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c[6691,6704] [2022-11-03 03:45:27,786 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:45:27,800 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:45:27,800 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:45:27 WrapperNode [2022-11-03 03:45:27,801 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:45:27,802 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:45:27,802 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:45:27,802 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:45:27,809 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:45:27" (1/1) ... [2022-11-03 03:45:27,821 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:45:27" (1/1) ... [2022-11-03 03:45:27,846 INFO L138 Inliner]: procedures = 21, calls = 13, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 246 [2022-11-03 03:45:27,847 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:45:27,847 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:45:27,848 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:45:27,848 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:45:27,856 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:45:27" (1/1) ... [2022-11-03 03:45:27,856 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:45:27" (1/1) ... [2022-11-03 03:45:27,859 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:45:27" (1/1) ... [2022-11-03 03:45:27,859 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:45:27" (1/1) ... [2022-11-03 03:45:27,864 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:45:27" (1/1) ... [2022-11-03 03:45:27,869 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:45:27" (1/1) ... [2022-11-03 03:45:27,871 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:45:27" (1/1) ... [2022-11-03 03:45:27,872 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:45:27" (1/1) ... [2022-11-03 03:45:27,875 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:45:27,876 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:45:27,876 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:45:27,877 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:45:27,877 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:45:27" (1/1) ... [2022-11-03 03:45:27,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:45:27,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6a8aafb-c878-4315-a375-c5e435d961e3/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:45:27,909 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6a8aafb-c878-4315-a375-c5e435d961e3/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:45:27,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6a8aafb-c878-4315-a375-c5e435d961e3/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:45:27,965 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 03:45:27,965 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 03:45:27,965 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:45:27,966 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:45:28,051 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:45:28,054 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:45:28,398 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:45:28,905 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:45:28,905 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 03:45:28,908 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:45:28 BoogieIcfgContainer [2022-11-03 03:45:28,908 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:45:28,911 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:45:28,911 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:45:28,914 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:45:28,915 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:45:27" (1/3) ... [2022-11-03 03:45:28,916 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d0ec641 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:45:28, skipping insertion in model container [2022-11-03 03:45:28,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:45:27" (2/3) ... [2022-11-03 03:45:28,916 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d0ec641 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:45:28, skipping insertion in model container [2022-11-03 03:45:28,917 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:45:28" (3/3) ... [2022-11-03 03:45:28,918 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c [2022-11-03 03:45:28,937 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:45:28,937 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 03:45:28,983 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:45:28,991 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;@57bd227b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:45:28,992 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 03:45:29,000 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:45:29,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-03 03:45:29,006 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:45:29,007 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-03 03:45:29,008 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:45:29,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:45:29,015 INFO L85 PathProgramCache]: Analyzing trace with hash 14224009, now seen corresponding path program 1 times [2022-11-03 03:45:29,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:45:29,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050619196] [2022-11-03 03:45:29,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:45:29,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:45:29,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:45:30,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:45:30,743 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:45:30,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050619196] [2022-11-03 03:45:30,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050619196] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:45:30,746 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:45:30,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:45:30,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322984223] [2022-11-03 03:45:30,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:45:30,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:45:30,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:45:30,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:45:30,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:45:30,792 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) [2022-11-03 03:45:30,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:45:30,864 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2022-11-03 03:45:30,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:45:30,867 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 [2022-11-03 03:45:30,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:45:30,875 INFO L225 Difference]: With dead ends: 19 [2022-11-03 03:45:30,875 INFO L226 Difference]: Without dead ends: 10 [2022-11-03 03:45:30,877 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 [2022-11-03 03:45:30,883 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 4 mSDsluCounter, 8 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, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:45:30,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 8 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:45:30,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2022-11-03 03:45:30,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 8. [2022-11-03 03:45:30,915 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) [2022-11-03 03:45:30,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2022-11-03 03:45:30,917 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 4 [2022-11-03 03:45:30,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:45:30,917 INFO L495 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2022-11-03 03:45:30,918 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) [2022-11-03 03:45:30,918 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2022-11-03 03:45:30,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-03 03:45:30,919 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:45:30,919 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2022-11-03 03:45:30,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 03:45:30,920 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:45:30,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:45:30,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1449112849, now seen corresponding path program 1 times [2022-11-03 03:45:30,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:45:30,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928228503] [2022-11-03 03:45:30,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:45:30,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:45:31,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:45:34,568 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:45:34,568 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:45:34,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928228503] [2022-11-03 03:45:34,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928228503] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:45:34,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206710226] [2022-11-03 03:45:34,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:45:34,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:45:34,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6a8aafb-c878-4315-a375-c5e435d961e3/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:45:34,576 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6a8aafb-c878-4315-a375-c5e435d961e3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:45:34,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6a8aafb-c878-4315-a375-c5e435d961e3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 03:45:34,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:45:34,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-03 03:45:34,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:45:37,971 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:45:37,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:55:23,905 WARN L234 SmtUtils]: Spent 23.84s on a formula simplification. DAG size of input: 968 DAG size of output: 880 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:55:23,916 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:55:23,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206710226] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:55:23,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [222653016] [2022-11-03 03:55:23,954 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-11-03 03:55:23,955 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:55:23,959 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:55:23,965 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:55:23,966 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:55:34,385 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 5400 conjuctions. This might take some time... [2022-11-03 03:55:54,608 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 5400 conjuctions. [2022-11-03 03:55:56,460 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 5400 conjuctions. This might take some time... [2022-11-03 03:56:17,215 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 5400 conjuctions. [2022-11-03 03:56:20,686 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 5184 conjuctions. This might take some time... [2022-11-03 03:56:32,132 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 5184 conjuctions. [2022-11-03 03:56:33,407 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 5184 conjuctions. This might take some time... [2022-11-03 03:56:45,330 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 5184 conjuctions. [2022-11-03 03:56:48,824 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:56:58,759 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '98#(and (<= 0 ~id3~0) (= ~nomsg~0 ~p1_new~0) (<= 1 |ULTIMATE.start_init_~tmp~0#1|) (<= 0 ~id1~0) (<= 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) (or (and (= ~mode2~0 1) (or (and (or (and (<= 0 (+ ~p2_old~0 1)) (<= (+ ~p2_old~0 1) 0) (= ~send2~0 ~id2~0)) (and (= (ite (<= (mod ~send2~0 256) 127) (mod ~send2~0 256) (+ (- 256) (mod ~send2~0 256))) ~p2_old~0) (not (= ~send2~0 ~id2~0)))) (= (mod ~alive2~0 256) 0)) (and (= (ite (<= (mod ~send2~0 256) 127) (mod ~send2~0 256) (+ (- 256) (mod ~send2~0 256))) ~p2_old~0) (not (= (mod ~alive2~0 256) 0)))) (<= 0 ~st2~0) (= ~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))) (<= |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)))) (or (and (exists ((v_~r1~0_58 Int)) (= ~r1~0 (ite (<= (mod (+ v_~r1~0_58 1) 256) 127) (mod (+ v_~r1~0_58 1) 256) (+ (- 256) (mod (+ v_~r1~0_58 1) 256))))) (<= 0 (+ ~p1_old~0 1)) (= ~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)) (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 (= (ite (<= (mod ~send1~0 256) 127) (mod ~send1~0 256) (+ (- 256) (mod ~send1~0 256))) ~p1_old~0) (not (= (mod ~alive1~0 256) 0)))))) (<= ~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|) (or (and (= ~mode3~0 1) (or (and (or (and (not (= ~send3~0 ~id3~0)) (= ~p3_old~0 (ite (<= (mod ~send3~0 256) 127) (mod ~send3~0 256) (+ (- 256) (mod ~send3~0 256))))) (and (= ~send3~0 ~id3~0) (<= 0 (+ ~p3_old~0 1)) (<= (+ ~p3_old~0 1) 0))) (= (mod ~alive3~0 256) 0)) (and (not (= (mod ~alive3~0 256) 0)) (= ~p3_old~0 (ite (<= (mod ~send3~0 256) 127) (mod ~send3~0 256) (+ (- 256) (mod ~send3~0 256)))))) (= ~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))) (<= ~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 [2022-11-03 03:56:58,760 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:56:58,760 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:56:58,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 12 [2022-11-03 03:56:58,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324972957] [2022-11-03 03:56:58,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:56:58,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-03 03:56:58,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:56:58,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-03 03:56:58,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2022-11-03 03:56:58,764 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) [2022-11-03 03:57:18,740 WARN L234 SmtUtils]: Spent 19.63s on a formula simplification. DAG size of input: 975 DAG size of output: 971 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:57:20,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:57:20,113 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2022-11-03 03:57:20,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 03:57:20,114 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 [2022-11-03 03:57:20,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:57:20,115 INFO L225 Difference]: With dead ends: 21 [2022-11-03 03:57:20,115 INFO L226 Difference]: Without dead ends: 19 [2022-11-03 03:57:20,116 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 57.5s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2022-11-03 03:57:20,117 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 18 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 03:57:20,118 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 25 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 03:57:20,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-11-03 03:57:20,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2022-11-03 03:57:20,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.0625) internal successors, (17), 16 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:57:20,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2022-11-03 03:57:20,133 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 7 [2022-11-03 03:57:20,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:57:20,134 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2022-11-03 03:57:20,134 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) [2022-11-03 03:57:20,134 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2022-11-03 03:57:20,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-03 03:57:20,135 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:57:20,135 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1] [2022-11-03 03:57:20,164 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6a8aafb-c878-4315-a375-c5e435d961e3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 03:57:20,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6a8aafb-c878-4315-a375-c5e435d961e3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:57:20,336 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:57:20,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:57:20,337 INFO L85 PathProgramCache]: Analyzing trace with hash -411691255, now seen corresponding path program 2 times [2022-11-03 03:57:20,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:57:20,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373730073] [2022-11-03 03:57:20,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:57:20,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:57:20,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:57:24,500 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:57:24,500 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:57:24,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373730073] [2022-11-03 03:57:24,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373730073] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:57:24,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805181222] [2022-11-03 03:57:24,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 03:57:24,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:57:24,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6a8aafb-c878-4315-a375-c5e435d961e3/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:57:24,517 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6a8aafb-c878-4315-a375-c5e435d961e3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:57:24,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6a8aafb-c878-4315-a375-c5e435d961e3/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 03:57:24,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-03 03:57:24,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:57:24,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-03 03:57:24,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:59:45,006 WARN L234 SmtUtils]: Spent 17.21s on a formula simplification. DAG size of input: 437 DAG size of output: 406 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)