./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-benchs/loop-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d30bf8-35be-4048-a022-18cb3546e04a/bin/utaipan-G1rejxKTta/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d30bf8-35be-4048-a022-18cb3546e04a/bin/utaipan-G1rejxKTta/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d30bf8-35be-4048-a022-18cb3546e04a/bin/utaipan-G1rejxKTta/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d30bf8-35be-4048-a022-18cb3546e04a/bin/utaipan-G1rejxKTta/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/loop-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d30bf8-35be-4048-a022-18cb3546e04a/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d30bf8-35be-4048-a022-18cb3546e04a/bin/utaipan-G1rejxKTta --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 1b0545f8921a3072195050599e45eb6fe3a423f5bd887720e0418c3666aaad9b --- 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-dbf71c6-m [2022-10-17 17:43:25,568 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 17:43:25,570 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 17:43:25,610 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 17:43:25,613 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 17:43:25,618 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 17:43:25,621 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 17:43:25,627 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 17:43:25,630 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 17:43:25,636 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 17:43:25,637 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 17:43:25,639 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 17:43:25,640 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 17:43:25,641 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 17:43:25,643 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 17:43:25,644 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 17:43:25,645 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 17:43:25,646 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 17:43:25,649 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 17:43:25,651 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 17:43:25,653 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 17:43:25,655 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 17:43:25,656 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 17:43:25,657 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 17:43:25,662 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 17:43:25,663 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 17:43:25,663 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 17:43:25,665 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 17:43:25,665 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 17:43:25,667 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 17:43:25,667 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 17:43:25,668 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 17:43:25,669 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 17:43:25,670 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 17:43:25,672 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 17:43:25,672 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 17:43:25,673 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 17:43:25,674 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 17:43:25,674 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 17:43:25,675 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 17:43:25,676 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 17:43:25,678 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d30bf8-35be-4048-a022-18cb3546e04a/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-10-17 17:43:25,716 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 17:43:25,716 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 17:43:25,717 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 17:43:25,717 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 17:43:25,718 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 17:43:25,718 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 17:43:25,718 INFO L138 SettingsManager]: * User list type=DISABLED [2022-10-17 17:43:25,718 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-10-17 17:43:25,719 INFO L138 SettingsManager]: * Explicit value domain=true [2022-10-17 17:43:25,719 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-10-17 17:43:25,719 INFO L138 SettingsManager]: * Octagon Domain=false [2022-10-17 17:43:25,719 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-10-17 17:43:25,720 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-10-17 17:43:25,720 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-10-17 17:43:25,720 INFO L138 SettingsManager]: * Interval Domain=false [2022-10-17 17:43:25,720 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-10-17 17:43:25,721 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-10-17 17:43:25,721 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-10-17 17:43:25,722 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 17:43:25,722 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 17:43:25,722 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 17:43:25,722 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 17:43:25,723 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 17:43:25,723 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 17:43:25,723 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 17:43:25,723 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 17:43:25,724 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 17:43:25,724 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 17:43:25,724 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 17:43:25,724 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 17:43:25,725 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 17:43:25,725 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 17:43:25,733 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:43:25,733 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 17:43:25,733 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-10-17 17:43:25,733 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 17:43:25,734 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 17:43:25,734 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-10-17 17:43:25,734 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 17:43:25,734 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 17:43:25,735 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-10-17 17:43:25,735 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_68d30bf8-35be-4048-a022-18cb3546e04a/bin/utaipan-G1rejxKTta/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d30bf8-35be-4048-a022-18cb3546e04a/bin/utaipan-G1rejxKTta Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1b0545f8921a3072195050599e45eb6fe3a423f5bd887720e0418c3666aaad9b [2022-10-17 17:43:26,004 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 17:43:26,029 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 17:43:26,033 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 17:43:26,034 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 17:43:26,035 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 17:43:26,037 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d30bf8-35be-4048-a022-18cb3546e04a/bin/utaipan-G1rejxKTta/../../sv-benchmarks/c/float-benchs/loop-1.c [2022-10-17 17:43:26,119 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d30bf8-35be-4048-a022-18cb3546e04a/bin/utaipan-G1rejxKTta/data/ec48a1bd6/9c88b2691bbf4a51b857e93fe18ca0a3/FLAG9d509e4d6 [2022-10-17 17:43:26,738 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 17:43:26,738 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d30bf8-35be-4048-a022-18cb3546e04a/sv-benchmarks/c/float-benchs/loop-1.c [2022-10-17 17:43:26,750 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d30bf8-35be-4048-a022-18cb3546e04a/bin/utaipan-G1rejxKTta/data/ec48a1bd6/9c88b2691bbf4a51b857e93fe18ca0a3/FLAG9d509e4d6 [2022-10-17 17:43:27,083 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d30bf8-35be-4048-a022-18cb3546e04a/bin/utaipan-G1rejxKTta/data/ec48a1bd6/9c88b2691bbf4a51b857e93fe18ca0a3 [2022-10-17 17:43:27,087 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 17:43:27,089 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 17:43:27,091 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 17:43:27,091 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 17:43:27,096 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 17:43:27,097 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:43:27" (1/1) ... [2022-10-17 17:43:27,098 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1593ad0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:43:27, skipping insertion in model container [2022-10-17 17:43:27,099 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:43:27" (1/1) ... [2022-10-17 17:43:27,108 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 17:43:27,124 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 17:43:27,353 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d30bf8-35be-4048-a022-18cb3546e04a/sv-benchmarks/c/float-benchs/loop-1.c[311,324] [2022-10-17 17:43:27,373 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:43:27,389 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 17:43:27,405 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d30bf8-35be-4048-a022-18cb3546e04a/sv-benchmarks/c/float-benchs/loop-1.c[311,324] [2022-10-17 17:43:27,409 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:43:27,425 INFO L208 MainTranslator]: Completed translation [2022-10-17 17:43:27,426 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:43:27 WrapperNode [2022-10-17 17:43:27,426 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 17:43:27,428 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 17:43:27,428 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 17:43:27,429 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 17:43:27,437 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:43:27" (1/1) ... [2022-10-17 17:43:27,448 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:43:27" (1/1) ... [2022-10-17 17:43:27,470 INFO L138 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 32 [2022-10-17 17:43:27,472 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 17:43:27,473 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 17:43:27,473 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 17:43:27,474 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 17:43:27,485 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:43:27" (1/1) ... [2022-10-17 17:43:27,486 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:43:27" (1/1) ... [2022-10-17 17:43:27,489 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:43:27" (1/1) ... [2022-10-17 17:43:27,490 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:43:27" (1/1) ... [2022-10-17 17:43:27,497 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:43:27" (1/1) ... [2022-10-17 17:43:27,503 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:43:27" (1/1) ... [2022-10-17 17:43:27,515 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:43:27" (1/1) ... [2022-10-17 17:43:27,517 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:43:27" (1/1) ... [2022-10-17 17:43:27,519 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 17:43:27,523 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 17:43:27,523 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 17:43:27,524 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 17:43:27,524 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:43:27" (1/1) ... [2022-10-17 17:43:27,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:43:27,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d30bf8-35be-4048-a022-18cb3546e04a/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:43:27,559 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d30bf8-35be-4048-a022-18cb3546e04a/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 17:43:27,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d30bf8-35be-4048-a022-18cb3546e04a/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 17:43:27,629 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 17:43:27,629 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 17:43:27,629 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 17:43:27,629 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 17:43:27,703 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 17:43:27,705 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 17:43:27,829 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 17:43:27,859 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 17:43:27,859 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-10-17 17:43:27,862 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:43:27 BoogieIcfgContainer [2022-10-17 17:43:27,863 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 17:43:27,866 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 17:43:27,866 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 17:43:27,873 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 17:43:27,873 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 05:43:27" (1/3) ... [2022-10-17 17:43:27,874 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@572055f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:43:27, skipping insertion in model container [2022-10-17 17:43:27,874 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:43:27" (2/3) ... [2022-10-17 17:43:27,875 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@572055f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:43:27, skipping insertion in model container [2022-10-17 17:43:27,875 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:43:27" (3/3) ... [2022-10-17 17:43:27,877 INFO L112 eAbstractionObserver]: Analyzing ICFG loop-1.c [2022-10-17 17:43:27,913 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 17:43:27,913 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 17:43:27,975 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 17:43:27,984 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;@5ae69cdd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 17:43:27,984 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 17:43:27,989 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:43:27,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-17 17:43:27,997 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:43:27,998 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-17 17:43:27,999 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:43:28,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:43:28,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1880294, now seen corresponding path program 1 times [2022-10-17 17:43:28,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:43:28,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200143729] [2022-10-17 17:43:28,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:43:28,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:43:28,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-10-17 17:43:28,143 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-10-17 17:43:28,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-10-17 17:43:28,183 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-10-17 17:43:28,186 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-10-17 17:43:28,187 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-10-17 17:43:28,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 17:43:28,196 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-10-17 17:43:28,201 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-10-17 17:43:28,225 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.10 05:43:28 BoogieIcfgContainer [2022-10-17 17:43:28,225 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-10-17 17:43:28,226 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-10-17 17:43:28,226 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-10-17 17:43:28,227 INFO L275 PluginConnector]: Witness Printer initialized [2022-10-17 17:43:28,227 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:43:27" (3/4) ... [2022-10-17 17:43:28,231 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-10-17 17:43:28,232 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-10-17 17:43:28,233 INFO L158 Benchmark]: Toolchain (without parser) took 1144.11ms. Allocated memory is still 115.3MB. Free memory was 69.9MB in the beginning and 62.2MB in the end (delta: 7.6MB). Peak memory consumption was 4.5MB. Max. memory is 16.1GB. [2022-10-17 17:43:28,234 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 115.3MB. Free memory was 85.9MB in the beginning and 85.9MB in the end (delta: 44.7kB). There was no memory consumed. Max. memory is 16.1GB. [2022-10-17 17:43:28,235 INFO L158 Benchmark]: CACSL2BoogieTranslator took 335.98ms. Allocated memory is still 115.3MB. Free memory was 69.6MB in the beginning and 88.8MB in the end (delta: -19.1MB). Peak memory consumption was 8.5MB. Max. memory is 16.1GB. [2022-10-17 17:43:28,236 INFO L158 Benchmark]: Boogie Procedure Inliner took 44.41ms. Allocated memory is still 115.3MB. Free memory was 88.8MB in the beginning and 87.4MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-10-17 17:43:28,237 INFO L158 Benchmark]: Boogie Preprocessor took 46.06ms. Allocated memory is still 115.3MB. Free memory was 87.4MB in the beginning and 86.2MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-10-17 17:43:28,238 INFO L158 Benchmark]: RCFGBuilder took 340.05ms. Allocated memory is still 115.3MB. Free memory was 86.2MB in the beginning and 76.3MB in the end (delta: 9.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-10-17 17:43:28,238 INFO L158 Benchmark]: TraceAbstraction took 359.37ms. Allocated memory is still 115.3MB. Free memory was 75.7MB in the beginning and 62.5MB in the end (delta: 13.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-10-17 17:43:28,239 INFO L158 Benchmark]: Witness Printer took 5.57ms. Allocated memory is still 115.3MB. Free memory was 62.5MB in the beginning and 62.2MB in the end (delta: 294.1kB). There was no memory consumed. Max. memory is 16.1GB. [2022-10-17 17:43:28,243 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 115.3MB. Free memory was 85.9MB in the beginning and 85.9MB in the end (delta: 44.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 335.98ms. Allocated memory is still 115.3MB. Free memory was 69.6MB in the beginning and 88.8MB in the end (delta: -19.1MB). Peak memory consumption was 8.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 44.41ms. Allocated memory is still 115.3MB. Free memory was 88.8MB in the beginning and 87.4MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 46.06ms. Allocated memory is still 115.3MB. Free memory was 87.4MB in the beginning and 86.2MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 340.05ms. Allocated memory is still 115.3MB. Free memory was 86.2MB in the beginning and 76.3MB in the end (delta: 9.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 359.37ms. Allocated memory is still 115.3MB. Free memory was 75.7MB in the beginning and 62.5MB in the end (delta: 13.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Witness Printer took 5.57ms. Allocated memory is still 115.3MB. Free memory was 62.5MB in the beginning and 62.2MB in the end (delta: 294.1kB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 4]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 14, overapproximation of someBinaryDOUBLEComparisonOperation at line 20. Possible FailurePath: [L8] float x, y, z; [L10] x = 1.f [L11] y = 1e7 [L12] z = 42.f VAL [x=1, y=10000000, z=42] [L14] COND FALSE !(x < y) [L20] CALL __VERIFIER_assert(z >= 0.f && z <= 1e8) [L4] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L4] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.2s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=7occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 4 NumberOfCodeBlocks, 4 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-10-17 17:43:28,301 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d30bf8-35be-4048-a022-18cb3546e04a/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d30bf8-35be-4048-a022-18cb3546e04a/bin/utaipan-G1rejxKTta/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d30bf8-35be-4048-a022-18cb3546e04a/bin/utaipan-G1rejxKTta/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d30bf8-35be-4048-a022-18cb3546e04a/bin/utaipan-G1rejxKTta/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d30bf8-35be-4048-a022-18cb3546e04a/bin/utaipan-G1rejxKTta/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/loop-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d30bf8-35be-4048-a022-18cb3546e04a/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d30bf8-35be-4048-a022-18cb3546e04a/bin/utaipan-G1rejxKTta --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 1b0545f8921a3072195050599e45eb6fe3a423f5bd887720e0418c3666aaad9b --- 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-dbf71c6-m [2022-10-17 17:43:31,107 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 17:43:31,109 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 17:43:31,159 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 17:43:31,160 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 17:43:31,165 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 17:43:31,168 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 17:43:31,174 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 17:43:31,181 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 17:43:31,190 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 17:43:31,191 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 17:43:31,193 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 17:43:31,194 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 17:43:31,196 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 17:43:31,199 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 17:43:31,202 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 17:43:31,211 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 17:43:31,213 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 17:43:31,218 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 17:43:31,223 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 17:43:31,232 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 17:43:31,235 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 17:43:31,236 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 17:43:31,239 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 17:43:31,245 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 17:43:31,252 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 17:43:31,253 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 17:43:31,254 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 17:43:31,256 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 17:43:31,258 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 17:43:31,258 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 17:43:31,259 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 17:43:31,262 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 17:43:31,263 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 17:43:31,264 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 17:43:31,265 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 17:43:31,266 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 17:43:31,266 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 17:43:31,267 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 17:43:31,269 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 17:43:31,270 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 17:43:31,277 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d30bf8-35be-4048-a022-18cb3546e04a/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2022-10-17 17:43:31,334 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 17:43:31,336 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 17:43:31,338 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 17:43:31,338 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 17:43:31,340 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 17:43:31,340 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 17:43:31,340 INFO L138 SettingsManager]: * User list type=DISABLED [2022-10-17 17:43:31,341 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-10-17 17:43:31,341 INFO L138 SettingsManager]: * Explicit value domain=true [2022-10-17 17:43:31,341 INFO L138 SettingsManager]: * Octagon Domain=false [2022-10-17 17:43:31,342 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-10-17 17:43:31,343 INFO L138 SettingsManager]: * Interval Domain=false [2022-10-17 17:43:31,345 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 17:43:31,345 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 17:43:31,345 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 17:43:31,346 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 17:43:31,346 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 17:43:31,346 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 17:43:31,346 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 17:43:31,347 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-10-17 17:43:31,347 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-10-17 17:43:31,347 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-10-17 17:43:31,347 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 17:43:31,348 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 17:43:31,348 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 17:43:31,348 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 17:43:31,349 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 17:43:31,349 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-17 17:43:31,349 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 17:43:31,349 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:43:31,350 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 17:43:31,350 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 17:43:31,350 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 17:43:31,351 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-10-17 17:43:31,351 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-10-17 17:43:31,352 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 17:43:31,352 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-10-17 17:43:31,352 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-10-17 17:43:31,353 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d30bf8-35be-4048-a022-18cb3546e04a/bin/utaipan-G1rejxKTta/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d30bf8-35be-4048-a022-18cb3546e04a/bin/utaipan-G1rejxKTta Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1b0545f8921a3072195050599e45eb6fe3a423f5bd887720e0418c3666aaad9b [2022-10-17 17:43:31,900 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 17:43:31,930 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 17:43:31,933 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 17:43:31,935 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 17:43:31,936 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 17:43:31,938 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d30bf8-35be-4048-a022-18cb3546e04a/bin/utaipan-G1rejxKTta/../../sv-benchmarks/c/float-benchs/loop-1.c [2022-10-17 17:43:32,018 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d30bf8-35be-4048-a022-18cb3546e04a/bin/utaipan-G1rejxKTta/data/cacd0ddb5/ddbd3c89f4974f349ca6dc5bb9d4e6db/FLAG2bbf0af66 [2022-10-17 17:43:32,592 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 17:43:32,593 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d30bf8-35be-4048-a022-18cb3546e04a/sv-benchmarks/c/float-benchs/loop-1.c [2022-10-17 17:43:32,599 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d30bf8-35be-4048-a022-18cb3546e04a/bin/utaipan-G1rejxKTta/data/cacd0ddb5/ddbd3c89f4974f349ca6dc5bb9d4e6db/FLAG2bbf0af66 [2022-10-17 17:43:32,960 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d30bf8-35be-4048-a022-18cb3546e04a/bin/utaipan-G1rejxKTta/data/cacd0ddb5/ddbd3c89f4974f349ca6dc5bb9d4e6db [2022-10-17 17:43:32,962 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 17:43:32,964 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 17:43:32,966 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 17:43:32,966 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 17:43:32,977 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 17:43:32,978 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:43:32" (1/1) ... [2022-10-17 17:43:32,979 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d6333f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:43:32, skipping insertion in model container [2022-10-17 17:43:32,980 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:43:32" (1/1) ... [2022-10-17 17:43:33,001 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 17:43:33,014 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 17:43:33,175 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d30bf8-35be-4048-a022-18cb3546e04a/sv-benchmarks/c/float-benchs/loop-1.c[311,324] [2022-10-17 17:43:33,189 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:43:33,205 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 17:43:33,247 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d30bf8-35be-4048-a022-18cb3546e04a/sv-benchmarks/c/float-benchs/loop-1.c[311,324] [2022-10-17 17:43:33,252 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:43:33,295 INFO L208 MainTranslator]: Completed translation [2022-10-17 17:43:33,296 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:43:33 WrapperNode [2022-10-17 17:43:33,296 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 17:43:33,298 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 17:43:33,298 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 17:43:33,298 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 17:43:33,308 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:43:33" (1/1) ... [2022-10-17 17:43:33,320 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:43:33" (1/1) ... [2022-10-17 17:43:33,344 INFO L138 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 33 [2022-10-17 17:43:33,344 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 17:43:33,346 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 17:43:33,347 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 17:43:33,348 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 17:43:33,358 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:43:33" (1/1) ... [2022-10-17 17:43:33,359 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:43:33" (1/1) ... [2022-10-17 17:43:33,378 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:43:33" (1/1) ... [2022-10-17 17:43:33,378 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:43:33" (1/1) ... [2022-10-17 17:43:33,386 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:43:33" (1/1) ... [2022-10-17 17:43:33,393 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:43:33" (1/1) ... [2022-10-17 17:43:33,401 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:43:33" (1/1) ... [2022-10-17 17:43:33,403 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:43:33" (1/1) ... [2022-10-17 17:43:33,416 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 17:43:33,419 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 17:43:33,420 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 17:43:33,421 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 17:43:33,422 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:43:33" (1/1) ... [2022-10-17 17:43:33,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:43:33,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d30bf8-35be-4048-a022-18cb3546e04a/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:43:33,464 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d30bf8-35be-4048-a022-18cb3546e04a/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 17:43:33,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d30bf8-35be-4048-a022-18cb3546e04a/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 17:43:33,527 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 17:43:33,530 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 17:43:33,530 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 17:43:33,530 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-10-17 17:43:33,636 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 17:43:33,639 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 17:43:34,333 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 17:43:34,340 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 17:43:34,340 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-10-17 17:43:34,342 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:43:34 BoogieIcfgContainer [2022-10-17 17:43:34,343 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 17:43:34,361 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 17:43:34,361 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 17:43:34,365 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 17:43:34,365 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 05:43:32" (1/3) ... [2022-10-17 17:43:34,366 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c8638c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:43:34, skipping insertion in model container [2022-10-17 17:43:34,366 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:43:33" (2/3) ... [2022-10-17 17:43:34,367 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c8638c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:43:34, skipping insertion in model container [2022-10-17 17:43:34,367 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:43:34" (3/3) ... [2022-10-17 17:43:34,369 INFO L112 eAbstractionObserver]: Analyzing ICFG loop-1.c [2022-10-17 17:43:34,420 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 17:43:34,421 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 17:43:34,495 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 17:43:34,505 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;@4c32096a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 17:43:34,505 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 17:43:34,510 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 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) [2022-10-17 17:43:34,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-10-17 17:43:34,518 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:43:34,519 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-10-17 17:43:34,520 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:43:34,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:43:34,527 INFO L85 PathProgramCache]: Analyzing trace with hash 889633835, now seen corresponding path program 1 times [2022-10-17 17:43:34,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-10-17 17:43:34,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [594553194] [2022-10-17 17:43:34,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:43:34,545 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-10-17 17:43:34,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d30bf8-35be-4048-a022-18cb3546e04a/bin/utaipan-G1rejxKTta/mathsat [2022-10-17 17:43:34,549 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d30bf8-35be-4048-a022-18cb3546e04a/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-10-17 17:43:34,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d30bf8-35be-4048-a022-18cb3546e04a/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-10-17 17:43:34,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:43:34,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 3 conjunts are in the unsatisfiable core [2022-10-17 17:43:34,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:43:34,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:43:34,750 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:43:34,751 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-10-17 17:43:34,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [594553194] [2022-10-17 17:43:34,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [594553194] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:43:34,753 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:43:34,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:43:34,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605547019] [2022-10-17 17:43:34,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:43:34,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:43:34,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-10-17 17:43:34,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:43:34,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:43:34,806 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2022-10-17 17:43:34,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:43:34,825 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2022-10-17 17:43:34,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:43:34,828 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-10-17 17:43:34,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:43:34,838 INFO L225 Difference]: With dead ends: 20 [2022-10-17 17:43:34,838 INFO L226 Difference]: Without dead ends: 8 [2022-10-17 17:43:34,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:43:34,846 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 17:43:34,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 2 Unchecked, 0.0s Time] [2022-10-17 17:43:34,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2022-10-17 17:43:34,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2022-10-17 17:43:34,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:43:34,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2022-10-17 17:43:34,888 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2022-10-17 17:43:34,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:43:34,889 INFO L495 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2022-10-17 17:43:34,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2022-10-17 17:43:34,889 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2022-10-17 17:43:34,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-10-17 17:43:34,890 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:43:34,890 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:43:34,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d30bf8-35be-4048-a022-18cb3546e04a/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-10-17 17:43:35,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d30bf8-35be-4048-a022-18cb3546e04a/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 [2022-10-17 17:43:35,100 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:43:35,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:43:35,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1810510480, now seen corresponding path program 1 times [2022-10-17 17:43:35,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-10-17 17:43:35,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1899431733] [2022-10-17 17:43:35,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:43:35,102 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-10-17 17:43:35,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d30bf8-35be-4048-a022-18cb3546e04a/bin/utaipan-G1rejxKTta/mathsat [2022-10-17 17:43:35,104 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d30bf8-35be-4048-a022-18cb3546e04a/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-10-17 17:43:35,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d30bf8-35be-4048-a022-18cb3546e04a/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-10-17 17:43:35,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:43:35,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 6 conjunts are in the unsatisfiable core [2022-10-17 17:43:35,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:43:35,399 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:43:35,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:43:39,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:43:39,504 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-10-17 17:43:39,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1899431733] [2022-10-17 17:43:39,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1899431733] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:43:39,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1038071583] [2022-10-17 17:43:39,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:43:39,505 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-10-17 17:43:39,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d30bf8-35be-4048-a022-18cb3546e04a/bin/utaipan-G1rejxKTta/cvc4 [2022-10-17 17:43:39,512 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d30bf8-35be-4048-a022-18cb3546e04a/bin/utaipan-G1rejxKTta/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-10-17 17:43:39,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d30bf8-35be-4048-a022-18cb3546e04a/bin/utaipan-G1rejxKTta/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2022-10-17 17:43:39,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:43:39,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 5 conjunts are in the unsatisfiable core [2022-10-17 17:43:39,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:43:39,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:43:39,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:43:40,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:43:40,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1038071583] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:43:40,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697515103] [2022-10-17 17:43:40,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:43:40,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:43:40,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d30bf8-35be-4048-a022-18cb3546e04a/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:43:40,509 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d30bf8-35be-4048-a022-18cb3546e04a/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:43:40,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d30bf8-35be-4048-a022-18cb3546e04a/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-17 17:43:40,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:43:40,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 7 conjunts are in the unsatisfiable core [2022-10-17 17:43:40,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:43:41,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:43:41,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:43:54,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:43:54,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697515103] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:43:54,573 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-10-17 17:43:54,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 5, 5] total 14 [2022-10-17 17:43:54,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208190711] [2022-10-17 17:43:54,574 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-10-17 17:43:54,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-10-17 17:43:54,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-10-17 17:43:54,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-10-17 17:43:54,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=143, Unknown=1, NotChecked=0, Total=182 [2022-10-17 17:43:54,576 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 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)