./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/geo1-ll_unwindbound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9120b10d-1452-44b5-b340-5bc0eb970b8a/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9120b10d-1452-44b5-b340-5bc0eb970b8a/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9120b10d-1452-44b5-b340-5bc0eb970b8a/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9120b10d-1452-44b5-b340-5bc0eb970b8a/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/geo1-ll_unwindbound50.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9120b10d-1452-44b5-b340-5bc0eb970b8a/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9120b10d-1452-44b5-b340-5bc0eb970b8a/bin/utaipan-I9t0OCRTmS --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 6730d7e2d0ed6d5662ed2cfed2073e9880e52e7f1f28b9287feb3ffdee545a5a --- 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-8393723 [2022-11-19 07:29:45,407 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:29:45,411 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:29:45,434 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:29:45,434 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:29:45,435 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:29:45,437 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:29:45,448 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:29:45,451 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:29:45,456 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:29:45,457 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:29:45,458 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:29:45,459 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:29:45,460 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:29:45,461 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:29:45,462 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:29:45,462 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:29:45,463 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:29:45,465 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:29:45,478 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:29:45,480 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:29:45,484 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:29:45,485 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:29:45,485 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:29:45,488 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:29:45,489 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:29:45,489 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:29:45,490 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:29:45,490 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:29:45,491 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:29:45,491 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:29:45,492 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:29:45,493 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:29:45,499 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:29:45,501 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:29:45,501 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:29:45,502 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:29:45,502 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:29:45,503 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:29:45,503 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:29:45,504 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:29:45,505 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9120b10d-1452-44b5-b340-5bc0eb970b8a/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 07:29:45,527 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:29:45,527 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:29:45,527 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:29:45,528 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:29:45,528 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:29:45,529 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:29:45,529 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:29:45,529 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:29:45,529 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:29:45,529 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 07:29:45,530 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:29:45,530 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:29:45,530 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 07:29:45,530 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 07:29:45,530 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:29:45,531 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 07:29:45,531 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 07:29:45,531 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 07:29:45,532 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:29:45,532 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 07:29:45,532 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:29:45,533 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 07:29:45,533 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:29:45,533 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 07:29:45,533 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:29:45,533 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 07:29:45,534 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 07:29:45,534 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 07:29:45,534 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:29:45,534 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 07:29:45,534 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:29:45,535 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:29:45,535 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:29:45,535 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:29:45,535 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 07:29:45,536 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:29:45,536 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 07:29:45,536 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 07:29:45,536 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 07:29:45,536 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 07:29:45,537 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:29:45,537 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_9120b10d-1452-44b5-b340-5bc0eb970b8a/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9120b10d-1452-44b5-b340-5bc0eb970b8a/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6730d7e2d0ed6d5662ed2cfed2073e9880e52e7f1f28b9287feb3ffdee545a5a [2022-11-19 07:29:45,839 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:29:45,864 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:29:45,867 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:29:45,868 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:29:45,870 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:29:45,872 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9120b10d-1452-44b5-b340-5bc0eb970b8a/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/nla-digbench-scaling/geo1-ll_unwindbound50.c [2022-11-19 07:29:45,936 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9120b10d-1452-44b5-b340-5bc0eb970b8a/bin/utaipan-I9t0OCRTmS/data/ec4321d65/868e9eb6443a49e6ab09309aea3925e3/FLAGace270fab [2022-11-19 07:29:46,434 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:29:46,434 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9120b10d-1452-44b5-b340-5bc0eb970b8a/sv-benchmarks/c/nla-digbench-scaling/geo1-ll_unwindbound50.c [2022-11-19 07:29:46,446 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9120b10d-1452-44b5-b340-5bc0eb970b8a/bin/utaipan-I9t0OCRTmS/data/ec4321d65/868e9eb6443a49e6ab09309aea3925e3/FLAGace270fab [2022-11-19 07:29:46,818 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9120b10d-1452-44b5-b340-5bc0eb970b8a/bin/utaipan-I9t0OCRTmS/data/ec4321d65/868e9eb6443a49e6ab09309aea3925e3 [2022-11-19 07:29:46,821 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:29:46,825 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:29:46,828 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:29:46,828 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:29:46,832 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:29:46,833 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:29:46" (1/1) ... [2022-11-19 07:29:46,834 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36bdcdc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:29:46, skipping insertion in model container [2022-11-19 07:29:46,835 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:29:46" (1/1) ... [2022-11-19 07:29:46,844 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:29:46,860 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:29:47,082 WARN L234 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_9120b10d-1452-44b5-b340-5bc0eb970b8a/sv-benchmarks/c/nla-digbench-scaling/geo1-ll_unwindbound50.c[546,559] [2022-11-19 07:29:47,096 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:29:47,104 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:29:47,117 WARN L234 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_9120b10d-1452-44b5-b340-5bc0eb970b8a/sv-benchmarks/c/nla-digbench-scaling/geo1-ll_unwindbound50.c[546,559] [2022-11-19 07:29:47,122 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:29:47,135 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:29:47,136 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:29:47 WrapperNode [2022-11-19 07:29:47,136 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:29:47,137 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:29:47,137 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:29:47,137 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:29:47,145 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:29:47" (1/1) ... [2022-11-19 07:29:47,153 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:29:47" (1/1) ... [2022-11-19 07:29:47,170 INFO L138 Inliner]: procedures = 14, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 45 [2022-11-19 07:29:47,170 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:29:47,171 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:29:47,171 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:29:47,171 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:29:47,180 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:29:47" (1/1) ... [2022-11-19 07:29:47,180 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:29:47" (1/1) ... [2022-11-19 07:29:47,181 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:29:47" (1/1) ... [2022-11-19 07:29:47,181 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:29:47" (1/1) ... [2022-11-19 07:29:47,184 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:29:47" (1/1) ... [2022-11-19 07:29:47,187 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:29:47" (1/1) ... [2022-11-19 07:29:47,189 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:29:47" (1/1) ... [2022-11-19 07:29:47,189 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:29:47" (1/1) ... [2022-11-19 07:29:47,191 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:29:47,192 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:29:47,192 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:29:47,192 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:29:47,193 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:29:47" (1/1) ... [2022-11-19 07:29:47,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:29:47,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9120b10d-1452-44b5-b340-5bc0eb970b8a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:29:47,226 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9120b10d-1452-44b5-b340-5bc0eb970b8a/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:29:47,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9120b10d-1452-44b5-b340-5bc0eb970b8a/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:29:47,276 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 07:29:47,276 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-19 07:29:47,276 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-19 07:29:47,277 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 07:29:47,277 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:29:47,277 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:29:47,277 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-19 07:29:47,277 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-19 07:29:47,358 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:29:47,361 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:29:47,577 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:29:47,613 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:29:47,614 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-19 07:29:47,616 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:29:47 BoogieIcfgContainer [2022-11-19 07:29:47,616 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:29:47,618 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:29:47,618 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:29:47,634 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:29:47,634 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:29:46" (1/3) ... [2022-11-19 07:29:47,635 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d0559d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:29:47, skipping insertion in model container [2022-11-19 07:29:47,635 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:29:47" (2/3) ... [2022-11-19 07:29:47,635 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d0559d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:29:47, skipping insertion in model container [2022-11-19 07:29:47,636 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:29:47" (3/3) ... [2022-11-19 07:29:47,637 INFO L112 eAbstractionObserver]: Analyzing ICFG geo1-ll_unwindbound50.c [2022-11-19 07:29:47,670 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:29:47,670 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 07:29:47,744 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:29:47,757 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;@60eaf212, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:29:47,757 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 07:29:47,762 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 07:29:47,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-19 07:29:47,770 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:29:47,771 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:29:47,772 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:29:47,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:29:47,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1517355578, now seen corresponding path program 1 times [2022-11-19 07:29:47,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:29:47,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810795422] [2022-11-19 07:29:47,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:29:47,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:29:47,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:29:47,966 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:29:47,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810795422] [2022-11-19 07:29:47,967 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-19 07:29:47,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542069362] [2022-11-19 07:29:47,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:29:47,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:29:47,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9120b10d-1452-44b5-b340-5bc0eb970b8a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:29:47,973 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9120b10d-1452-44b5-b340-5bc0eb970b8a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:29:47,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9120b10d-1452-44b5-b340-5bc0eb970b8a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 07:29:48,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:29:48,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-19 07:29:48,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:29:48,099 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:29:48,100 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:29:48,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542069362] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:29:48,101 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:29:48,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:29:48,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273821063] [2022-11-19 07:29:48,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:29:48,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-19 07:29:48,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:29:48,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-19 07:29:48,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-19 07:29:48,154 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-19 07:29:48,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:29:48,201 INFO L93 Difference]: Finished difference Result 34 states and 45 transitions. [2022-11-19 07:29:48,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-19 07:29:48,204 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 14 [2022-11-19 07:29:48,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:29:48,213 INFO L225 Difference]: With dead ends: 34 [2022-11-19 07:29:48,213 INFO L226 Difference]: Without dead ends: 18 [2022-11-19 07:29:48,217 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-19 07:29:48,222 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:29:48,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:29:48,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-11-19 07:29:48,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-11-19 07:29:48,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-19 07:29:48,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2022-11-19 07:29:48,263 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 14 [2022-11-19 07:29:48,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:29:48,265 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2022-11-19 07:29:48,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-19 07:29:48,266 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2022-11-19 07:29:48,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-19 07:29:48,268 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:29:48,269 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:29:48,281 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9120b10d-1452-44b5-b340-5bc0eb970b8a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 07:29:48,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9120b10d-1452-44b5-b340-5bc0eb970b8a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-19 07:29:48,475 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:29:48,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:29:48,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1135881823, now seen corresponding path program 1 times [2022-11-19 07:29:48,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:29:48,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914733506] [2022-11-19 07:29:48,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:29:48,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:29:48,509 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 07:29:48,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1339058954] [2022-11-19 07:29:48,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:29:48,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:29:48,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9120b10d-1452-44b5-b340-5bc0eb970b8a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:29:48,520 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9120b10d-1452-44b5-b340-5bc0eb970b8a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:29:48,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9120b10d-1452-44b5-b340-5bc0eb970b8a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 07:29:48,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:29:48,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-19 07:29:48,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:29:48,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:29:48,750 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:29:48,752 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:29:48,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914733506] [2022-11-19 07:29:48,753 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 07:29:48,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339058954] [2022-11-19 07:29:48,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339058954] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:29:48,755 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:29:48,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 07:29:48,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211574761] [2022-11-19 07:29:48,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:29:48,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:29:48,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:29:48,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:29:48,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:29:48,760 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-19 07:29:48,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:29:48,862 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2022-11-19 07:29:48,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:29:48,862 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 14 [2022-11-19 07:29:48,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:29:48,864 INFO L225 Difference]: With dead ends: 29 [2022-11-19 07:29:48,864 INFO L226 Difference]: Without dead ends: 27 [2022-11-19 07:29:48,865 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:29:48,866 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 7 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:29:48,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 55 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:29:48,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-19 07:29:48,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2022-11-19 07:29:48,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 18 states have internal predecessors, (20), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 07:29:48,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2022-11-19 07:29:48,881 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 14 [2022-11-19 07:29:48,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:29:48,881 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2022-11-19 07:29:48,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-19 07:29:48,882 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2022-11-19 07:29:48,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-19 07:29:48,882 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:29:48,883 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:29:48,889 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9120b10d-1452-44b5-b340-5bc0eb970b8a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 07:29:49,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9120b10d-1452-44b5-b340-5bc0eb970b8a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:29:49,088 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:29:49,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:29:49,089 INFO L85 PathProgramCache]: Analyzing trace with hash 769061280, now seen corresponding path program 1 times [2022-11-19 07:29:49,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:29:49,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43488229] [2022-11-19 07:29:49,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:29:49,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:29:49,106 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 07:29:49,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1622268749] [2022-11-19 07:29:49,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:29:49,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:29:49,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9120b10d-1452-44b5-b340-5bc0eb970b8a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:29:49,116 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9120b10d-1452-44b5-b340-5bc0eb970b8a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:29:49,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9120b10d-1452-44b5-b340-5bc0eb970b8a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 07:29:49,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:29:49,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:29:49,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:29:49,224 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:29:49,225 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:29:49,225 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:29:49,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43488229] [2022-11-19 07:29:49,225 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 07:29:49,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622268749] [2022-11-19 07:29:49,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622268749] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:29:49,226 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:29:49,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:29:49,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941808267] [2022-11-19 07:29:49,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:29:49,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:29:49,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:29:49,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:29:49,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:29:49,228 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-19 07:29:49,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:29:49,243 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2022-11-19 07:29:49,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:29:49,243 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 15 [2022-11-19 07:29:49,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:29:49,245 INFO L225 Difference]: With dead ends: 33 [2022-11-19 07:29:49,246 INFO L226 Difference]: Without dead ends: 25 [2022-11-19 07:29:49,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:29:49,247 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:29:49,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:29:49,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-19 07:29:49,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-11-19 07:29:49,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.1875) internal successors, (19), 18 states have internal predecessors, (19), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 07:29:49,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-11-19 07:29:49,253 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 15 [2022-11-19 07:29:49,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:29:49,254 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-11-19 07:29:49,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-19 07:29:49,254 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-11-19 07:29:49,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-19 07:29:49,255 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:29:49,255 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:29:49,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9120b10d-1452-44b5-b340-5bc0eb970b8a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 07:29:49,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9120b10d-1452-44b5-b340-5bc0eb970b8a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:29:49,460 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:29:49,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:29:49,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1485105903, now seen corresponding path program 1 times [2022-11-19 07:29:49,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:29:49,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053785861] [2022-11-19 07:29:49,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:29:49,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:29:49,481 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 07:29:49,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1897164906] [2022-11-19 07:29:49,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:29:49,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:29:49,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9120b10d-1452-44b5-b340-5bc0eb970b8a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:29:49,491 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9120b10d-1452-44b5-b340-5bc0eb970b8a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:29:49,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9120b10d-1452-44b5-b340-5bc0eb970b8a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 07:29:49,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:29:49,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-19 07:29:49,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:29:49,700 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:29:49,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:29:49,810 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:29:49,811 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:29:49,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053785861] [2022-11-19 07:29:49,811 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 07:29:49,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897164906] [2022-11-19 07:29:49,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897164906] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:29:49,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1309498216] [2022-11-19 07:29:49,842 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-19 07:29:49,842 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:29:49,845 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:29:49,856 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:29:49,856 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:29:50,386 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2022-11-19 07:29:50,424 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 69 for LOIs [2022-11-19 07:29:50,466 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:29:52,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1309498216] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:29:52,101 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:29:52,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [8, 7] total 23 [2022-11-19 07:29:52,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963210132] [2022-11-19 07:29:52,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:29:52,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-19 07:29:52,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:29:52,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-19 07:29:52,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2022-11-19 07:29:52,111 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 14 states, 10 states have (on average 1.2) internal successors, (12), 9 states have internal predecessors, (12), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-19 07:29:52,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:29:52,304 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2022-11-19 07:29:52,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-19 07:29:52,305 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 10 states have (on average 1.2) internal successors, (12), 9 states have internal predecessors, (12), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 21 [2022-11-19 07:29:52,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:29:52,306 INFO L225 Difference]: With dead ends: 34 [2022-11-19 07:29:52,307 INFO L226 Difference]: Without dead ends: 26 [2022-11-19 07:29:52,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2022-11-19 07:29:52,314 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 5 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:29:52,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 67 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 109 Invalid, 0 Unknown, 31 Unchecked, 0.2s Time] [2022-11-19 07:29:52,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-19 07:29:52,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-11-19 07:29:52,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 07:29:52,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2022-11-19 07:29:52,327 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 21 [2022-11-19 07:29:52,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:29:52,328 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2022-11-19 07:29:52,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 10 states have (on average 1.2) internal successors, (12), 9 states have internal predecessors, (12), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-19 07:29:52,328 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2022-11-19 07:29:52,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-19 07:29:52,330 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:29:52,330 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:29:52,338 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9120b10d-1452-44b5-b340-5bc0eb970b8a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 07:29:52,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9120b10d-1452-44b5-b340-5bc0eb970b8a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:29:52,536 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:29:52,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:29:52,536 INFO L85 PathProgramCache]: Analyzing trace with hash 101792437, now seen corresponding path program 1 times [2022-11-19 07:29:52,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:29:52,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793837686] [2022-11-19 07:29:52,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:29:52,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:29:52,549 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 07:29:52,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [355088344] [2022-11-19 07:29:52,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:29:52,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:29:52,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9120b10d-1452-44b5-b340-5bc0eb970b8a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:29:52,551 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9120b10d-1452-44b5-b340-5bc0eb970b8a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:29:52,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9120b10d-1452-44b5-b340-5bc0eb970b8a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 07:29:52,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:29:52,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-19 07:29:52,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:29:52,767 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:29:52,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:29:53,095 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:29:53,095 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:29:53,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793837686] [2022-11-19 07:29:53,096 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 07:29:53,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355088344] [2022-11-19 07:29:53,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355088344] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:29:53,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1400898921] [2022-11-19 07:29:53,098 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-19 07:29:53,099 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:29:53,099 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:29:53,099 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:29:53,100 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:29:53,952 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 30 for LOIs [2022-11-19 07:29:53,984 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 69 for LOIs [2022-11-19 07:29:54,014 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:29:55,655 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '748#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (< ~counter~0 51) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:29:55,655 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:29:55,656 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:29:55,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 14 [2022-11-19 07:29:55,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015321743] [2022-11-19 07:29:55,656 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 07:29:55,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-19 07:29:55,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:29:55,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-19 07:29:55,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2022-11-19 07:29:55,658 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-19 07:29:55,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:29:55,965 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2022-11-19 07:29:55,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-19 07:29:55,966 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 22 [2022-11-19 07:29:55,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:29:55,966 INFO L225 Difference]: With dead ends: 37 [2022-11-19 07:29:55,967 INFO L226 Difference]: Without dead ends: 33 [2022-11-19 07:29:55,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2022-11-19 07:29:55,968 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 40 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:29:55,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 93 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:29:55,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-11-19 07:29:55,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2022-11-19 07:29:55,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 07:29:55,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2022-11-19 07:29:55,977 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 22 [2022-11-19 07:29:55,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:29:55,977 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2022-11-19 07:29:55,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-19 07:29:55,978 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2022-11-19 07:29:55,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-19 07:29:55,978 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:29:55,978 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:29:55,989 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9120b10d-1452-44b5-b340-5bc0eb970b8a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-19 07:29:56,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9120b10d-1452-44b5-b340-5bc0eb970b8a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:29:56,179 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:29:56,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:29:56,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1222938614, now seen corresponding path program 1 times [2022-11-19 07:29:56,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:29:56,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480768327] [2022-11-19 07:29:56,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:29:56,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:29:56,194 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 07:29:56,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [765918837] [2022-11-19 07:29:56,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:29:56,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:29:56,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9120b10d-1452-44b5-b340-5bc0eb970b8a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:29:56,196 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9120b10d-1452-44b5-b340-5bc0eb970b8a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:29:56,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9120b10d-1452-44b5-b340-5bc0eb970b8a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 07:29:56,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:29:56,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-19 07:29:56,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:29:56,292 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:29:56,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:29:56,343 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:29:56,343 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:29:56,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480768327] [2022-11-19 07:29:56,343 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 07:29:56,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765918837] [2022-11-19 07:29:56,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765918837] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:29:56,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [895675596] [2022-11-19 07:29:56,346 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-19 07:29:56,346 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:29:56,346 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:29:56,347 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:29:56,347 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:29:57,026 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 56 for LOIs [2022-11-19 07:29:57,128 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 69 for LOIs [2022-11-19 07:29:57,155 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:29:58,424 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1000#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:29:58,424 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:29:58,424 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:29:58,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2022-11-19 07:29:58,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684509640] [2022-11-19 07:29:58,425 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 07:29:58,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 07:29:58,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:29:58,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 07:29:58,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2022-11-19 07:29:58,426 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-19 07:29:58,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:29:58,528 INFO L93 Difference]: Finished difference Result 64 states and 68 transitions. [2022-11-19 07:29:58,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-19 07:29:58,528 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 23 [2022-11-19 07:29:58,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:29:58,530 INFO L225 Difference]: With dead ends: 64 [2022-11-19 07:29:58,531 INFO L226 Difference]: Without dead ends: 58 [2022-11-19 07:29:58,532 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2022-11-19 07:29:58,533 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 30 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:29:58,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 79 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:29:58,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-11-19 07:29:58,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 46. [2022-11-19 07:29:58,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 33 states have (on average 1.121212121212121) internal successors, (37), 33 states have internal predecessors, (37), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-19 07:29:58,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2022-11-19 07:29:58,556 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 23 [2022-11-19 07:29:58,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:29:58,557 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2022-11-19 07:29:58,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-19 07:29:58,559 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2022-11-19 07:29:58,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-19 07:29:58,560 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:29:58,560 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:29:58,574 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9120b10d-1452-44b5-b340-5bc0eb970b8a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-19 07:29:58,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9120b10d-1452-44b5-b340-5bc0eb970b8a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:29:58,766 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:29:58,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:29:58,767 INFO L85 PathProgramCache]: Analyzing trace with hash 390558169, now seen corresponding path program 1 times [2022-11-19 07:29:58,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:29:58,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113162421] [2022-11-19 07:29:58,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:29:58,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:29:58,791 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 07:29:58,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [823621574] [2022-11-19 07:29:58,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:29:58,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:29:58,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9120b10d-1452-44b5-b340-5bc0eb970b8a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:29:58,796 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9120b10d-1452-44b5-b340-5bc0eb970b8a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:29:58,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9120b10d-1452-44b5-b340-5bc0eb970b8a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 07:29:58,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:29:58,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-19 07:29:58,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:29:58,969 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:29:58,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:29:59,073 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 07:29:59,074 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:29:59,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113162421] [2022-11-19 07:29:59,074 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 07:29:59,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823621574] [2022-11-19 07:29:59,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823621574] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:29:59,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [605541599] [2022-11-19 07:29:59,076 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-19 07:29:59,076 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:29:59,077 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:29:59,077 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:29:59,077 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:29:59,744 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 54 for LOIs [2022-11-19 07:29:59,822 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 69 for LOIs [2022-11-19 07:29:59,849 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:30:01,230 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1355#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (< ~counter~0 51) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:30:01,231 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:30:01,231 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:30:01,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 14 [2022-11-19 07:30:01,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63822206] [2022-11-19 07:30:01,231 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 07:30:01,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-19 07:30:01,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:30:01,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-19 07:30:01,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2022-11-19 07:30:01,232 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 14 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 12 states have internal predecessors, (27), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-19 07:30:01,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:30:01,405 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2022-11-19 07:30:01,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 07:30:01,405 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 12 states have internal predecessors, (27), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) Word has length 29 [2022-11-19 07:30:01,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:30:01,406 INFO L225 Difference]: With dead ends: 46 [2022-11-19 07:30:01,406 INFO L226 Difference]: Without dead ends: 0 [2022-11-19 07:30:01,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=117, Invalid=875, Unknown=0, NotChecked=0, Total=992 [2022-11-19 07:30:01,407 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 20 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:30:01,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 60 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 101 Invalid, 0 Unknown, 8 Unchecked, 0.1s Time] [2022-11-19 07:30:01,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-19 07:30:01,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-19 07:30:01,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:30:01,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-19 07:30:01,409 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2022-11-19 07:30:01,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:30:01,409 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-19 07:30:01,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 12 states have internal predecessors, (27), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-19 07:30:01,410 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-19 07:30:01,410 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-19 07:30:01,412 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-19 07:30:01,417 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9120b10d-1452-44b5-b340-5bc0eb970b8a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-19 07:30:01,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9120b10d-1452-44b5-b340-5bc0eb970b8a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:30:01,618 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-11-19 07:30:01,980 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-11-19 07:30:01,980 INFO L895 garLoopResultBuilder]: At program point L35-3(lines 35 45) the Hoare annotation is: (and (= (+ |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~y~0#1|) (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~z~0#1|) 1)) (<= 1 |ULTIMATE.start_main_~c~0#1|) (<= 1 |ULTIMATE.start_main_~k~0#1|)) [2022-11-19 07:30:01,980 INFO L899 garLoopResultBuilder]: For program point L35-4(lines 35 45) no Hoare annotation was computed. [2022-11-19 07:30:01,980 INFO L899 garLoopResultBuilder]: For program point L29(line 29) no Hoare annotation was computed. [2022-11-19 07:30:01,980 INFO L895 garLoopResultBuilder]: At program point L36(line 36) the Hoare annotation is: (and (= (+ |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~y~0#1|) (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~z~0#1|) 1)) (<= 1 |ULTIMATE.start_main_~c~0#1|) (<= 1 |ULTIMATE.start_main_~k~0#1|)) [2022-11-19 07:30:01,980 INFO L899 garLoopResultBuilder]: For program point L36-1(lines 35 45) no Hoare annotation was computed. [2022-11-19 07:30:01,980 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2022-11-19 07:30:01,981 INFO L895 garLoopResultBuilder]: At program point L28(line 28) the Hoare annotation is: (let ((.cse0 (select |#memory_int| 1))) (and (= (select |#length| 3) 12) (<= 0 (+ |ULTIMATE.start_main_~k~0#1| 2147483648)) (<= |ULTIMATE.start_main_~z~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~z~0#1| 2147483648)) (= 2 (select |#length| 1)) (<= |ULTIMATE.start_main_~k~0#1| 2147483647) (= (select |#valid| 3) 1) (= ~counter~0 0) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select .cse0 0) 48) (= 10 (select |#length| 2)) (= (select .cse0 1) 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))) [2022-11-19 07:30:01,981 INFO L895 garLoopResultBuilder]: At program point L28-1(line 28) the Hoare annotation is: (let ((.cse0 (select |#memory_int| 1))) (and (not (= (ite (<= 1 |ULTIMATE.start_main_~z~0#1|) 1 0) 0)) (= (select |#length| 3) 12) (<= 0 (+ |ULTIMATE.start_main_~k~0#1| 2147483648)) (<= |ULTIMATE.start_main_~z~0#1| 2147483647) (= 2 (select |#length| 1)) (<= |ULTIMATE.start_main_~k~0#1| 2147483647) (= (select |#valid| 3) 1) (= ~counter~0 0) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select .cse0 0) 48) (= 10 (select |#length| 2)) (= (select .cse0 1) 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))) [2022-11-19 07:30:01,981 INFO L895 garLoopResultBuilder]: At program point L49(line 49) the Hoare annotation is: (and (<= 1 |ULTIMATE.start_main_~c~0#1|) (<= 1 |ULTIMATE.start_main_~k~0#1|) (exists ((|v_ULTIMATE.start_main_~x~0#1_33| Int) (|ULTIMATE.start_main_~z~0#1| Int)) (let ((.cse0 (* |v_ULTIMATE.start_main_~x~0#1_33| |ULTIMATE.start_main_~z~0#1|))) (and (= (+ .cse0 1) (+ |v_ULTIMATE.start_main_~x~0#1_33| |ULTIMATE.start_main_~y~0#1|)) (= (+ |v_ULTIMATE.start_main_~x~0#1_33| |ULTIMATE.start_main_~x~0#1|) .cse0))))) [2022-11-19 07:30:01,981 INFO L902 garLoopResultBuilder]: At program point L49-1(line 49) the Hoare annotation is: true [2022-11-19 07:30:01,981 INFO L899 garLoopResultBuilder]: For program point L35-1(lines 35 45) no Hoare annotation was computed. [2022-11-19 07:30:01,981 INFO L902 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 12 14) the Hoare annotation is: true [2022-11-19 07:30:01,981 INFO L899 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 12 14) no Hoare annotation was computed. [2022-11-19 07:30:01,981 INFO L899 garLoopResultBuilder]: For program point L17(lines 17 18) no Hoare annotation was computed. [2022-11-19 07:30:01,982 INFO L899 garLoopResultBuilder]: For program point L16(lines 16 19) no Hoare annotation was computed. [2022-11-19 07:30:01,982 INFO L902 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 15 21) the Hoare annotation is: true [2022-11-19 07:30:01,982 INFO L899 garLoopResultBuilder]: For program point L16-2(lines 15 21) no Hoare annotation was computed. [2022-11-19 07:30:01,982 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 15 21) no Hoare annotation was computed. [2022-11-19 07:30:01,982 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 18) no Hoare annotation was computed. [2022-11-19 07:30:01,985 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:30:01,987 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-19 07:30:02,000 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 07:30:02 BoogieIcfgContainer [2022-11-19 07:30:02,000 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-19 07:30:02,001 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-19 07:30:02,001 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-19 07:30:02,001 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-19 07:30:02,002 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:29:47" (3/4) ... [2022-11-19 07:30:02,005 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-11-19 07:30:02,010 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure assume_abort_if_not [2022-11-19 07:30:02,010 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2022-11-19 07:30:02,013 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 16 nodes and edges [2022-11-19 07:30:02,014 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2022-11-19 07:30:02,014 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2022-11-19 07:30:02,014 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-11-19 07:30:02,045 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9120b10d-1452-44b5-b340-5bc0eb970b8a/bin/utaipan-I9t0OCRTmS/witness.graphml [2022-11-19 07:30:02,045 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-19 07:30:02,046 INFO L158 Benchmark]: Toolchain (without parser) took 15221.43ms. Allocated memory was 107.0MB in the beginning and 211.8MB in the end (delta: 104.9MB). Free memory was 70.9MB in the beginning and 79.7MB in the end (delta: -8.7MB). Peak memory consumption was 95.4MB. Max. memory is 16.1GB. [2022-11-19 07:30:02,046 INFO L158 Benchmark]: CDTParser took 0.63ms. Allocated memory is still 107.0MB. Free memory is still 87.2MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-19 07:30:02,047 INFO L158 Benchmark]: CACSL2BoogieTranslator took 308.37ms. Allocated memory is still 107.0MB. Free memory was 70.7MB in the beginning and 84.0MB in the end (delta: -13.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-19 07:30:02,047 INFO L158 Benchmark]: Boogie Procedure Inliner took 33.39ms. Allocated memory is still 107.0MB. Free memory was 84.0MB in the beginning and 82.3MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-19 07:30:02,047 INFO L158 Benchmark]: Boogie Preprocessor took 20.02ms. Allocated memory is still 107.0MB. Free memory was 82.3MB in the beginning and 81.6MB in the end (delta: 757.8kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-19 07:30:02,048 INFO L158 Benchmark]: RCFGBuilder took 424.86ms. Allocated memory is still 107.0MB. Free memory was 81.3MB in the beginning and 69.7MB in the end (delta: 11.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-19 07:30:02,048 INFO L158 Benchmark]: TraceAbstraction took 14382.38ms. Allocated memory was 107.0MB in the beginning and 211.8MB in the end (delta: 104.9MB). Free memory was 69.0MB in the beginning and 82.8MB in the end (delta: -13.8MB). Peak memory consumption was 93.9MB. Max. memory is 16.1GB. [2022-11-19 07:30:02,049 INFO L158 Benchmark]: Witness Printer took 44.41ms. Allocated memory is still 211.8MB. Free memory was 82.8MB in the beginning and 79.7MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-19 07:30:02,051 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.63ms. Allocated memory is still 107.0MB. Free memory is still 87.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 308.37ms. Allocated memory is still 107.0MB. Free memory was 70.7MB in the beginning and 84.0MB in the end (delta: -13.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 33.39ms. Allocated memory is still 107.0MB. Free memory was 84.0MB in the beginning and 82.3MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 20.02ms. Allocated memory is still 107.0MB. Free memory was 82.3MB in the beginning and 81.6MB in the end (delta: 757.8kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 424.86ms. Allocated memory is still 107.0MB. Free memory was 81.3MB in the beginning and 69.7MB in the end (delta: 11.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 14382.38ms. Allocated memory was 107.0MB in the beginning and 211.8MB in the end (delta: 104.9MB). Free memory was 69.0MB in the beginning and 82.8MB in the end (delta: -13.8MB). Peak memory consumption was 93.9MB. Max. memory is 16.1GB. * Witness Printer took 44.41ms. Allocated memory is still 211.8MB. Free memory was 82.8MB in the beginning and 79.7MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 18]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 14.3s, OverallIterations: 7, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 103 SdHoareTripleChecker+Valid, 0.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 102 mSDsluCounter, 419 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 39 IncrementalHoareTripleChecker+Unchecked, 318 mSDsCounter, 35 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 466 IncrementalHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 35 mSolverCounterUnsat, 101 mSDtfsCounter, 466 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 331 GetRequests, 216 SyntacticMatches, 4 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 6.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=46occurred in iteration=6, InterpolantAutomatonStates: 55, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 19 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 18 PreInvPairs, 30 NumberOfFragments, 220 HoareAnnotationTreeSize, 18 FomulaSimplifications, 45 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 1115 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 152 NumberOfCodeBlocks, 152 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 222 ConstructedInterpolants, 2 QuantifiedInterpolants, 670 SizeOfPredicates, 16 NumberOfNonLiveVariables, 558 ConjunctsInSsa, 83 ConjunctsInUnsatCore, 11 InterpolantComputations, 3 PerfectInterpolantSequences, 51/68 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME: 0.6s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 3, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 18, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 15, TOOLS_POST_TIME: 0.1s, TOOLS_POST_CALL_APPLICATIONS: 10, TOOLS_POST_CALL_TIME: 0.2s, TOOLS_POST_RETURN_APPLICATIONS: 6, TOOLS_POST_RETURN_TIME: 0.0s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 31, TOOLS_QUANTIFIERELIM_TIME: 0.4s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.0s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 48, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 10, DOMAIN_JOIN_TIME: 0.1s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 0, DOMAIN_WIDEN_TIME: 0.0s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 0, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 18, DOMAIN_ISBOTTOM_TIME: 0.0s, LOOP_SUMMARIZER_APPLICATIONS: 0, LOOP_SUMMARIZER_CACHE_MISSES: 0, LOOP_SUMMARIZER_OVERALL_TIME: 0.0s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 0, CALL_SUMMARIZER_APPLICATIONS: 6, CALL_SUMMARIZER_CACHE_MISSES: 2, CALL_SUMMARIZER_OVERALL_TIME: 0.0s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 152, DAG_COMPRESSION_RETAINED_NODES: 52, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 49]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: (x + y == x * z + 1 && 1 <= c) && 1 <= k RESULT: Ultimate proved your program to be correct! [2022-11-19 07:30:02,077 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9120b10d-1452-44b5-b340-5bc0eb970b8a/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE