./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound10.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_4aa250ff-8b9e-4052-a675-3dac6d0122a3/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa250ff-8b9e-4052-a675-3dac6d0122a3/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_4aa250ff-8b9e-4052-a675-3dac6d0122a3/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa250ff-8b9e-4052-a675-3dac6d0122a3/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound10.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa250ff-8b9e-4052-a675-3dac6d0122a3/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_4aa250ff-8b9e-4052-a675-3dac6d0122a3/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 4615816b63186e8ef25ffa56a09fb574b90534edb7a787dbb36e36eb2c34dee2 --- 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 06:34:38,555 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 06:34:38,556 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 06:34:38,583 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 06:34:38,587 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 06:34:38,590 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 06:34:38,593 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 06:34:38,595 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 06:34:38,597 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 06:34:38,605 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 06:34:38,606 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 06:34:38,607 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 06:34:38,607 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 06:34:38,608 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 06:34:38,609 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 06:34:38,610 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 06:34:38,611 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 06:34:38,612 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 06:34:38,613 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 06:34:38,619 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 06:34:38,621 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 06:34:38,623 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 06:34:38,626 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 06:34:38,627 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 06:34:38,638 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 06:34:38,638 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 06:34:38,639 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 06:34:38,639 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 06:34:38,640 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 06:34:38,641 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 06:34:38,641 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 06:34:38,642 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 06:34:38,643 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 06:34:38,643 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 06:34:38,644 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 06:34:38,644 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 06:34:38,645 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 06:34:38,645 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 06:34:38,646 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 06:34:38,646 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 06:34:38,649 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 06:34:38,650 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa250ff-8b9e-4052-a675-3dac6d0122a3/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 06:34:38,678 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 06:34:38,678 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 06:34:38,678 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 06:34:38,679 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 06:34:38,679 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 06:34:38,679 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 06:34:38,680 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 06:34:38,680 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 06:34:38,680 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 06:34:38,680 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 06:34:38,680 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 06:34:38,680 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 06:34:38,681 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 06:34:38,681 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 06:34:38,681 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 06:34:38,681 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 06:34:38,682 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 06:34:38,682 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 06:34:38,682 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 06:34:38,683 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 06:34:38,683 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 06:34:38,683 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 06:34:38,683 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 06:34:38,683 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 06:34:38,683 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 06:34:38,684 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 06:34:38,684 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 06:34:38,684 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 06:34:38,684 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 06:34:38,684 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 06:34:38,685 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 06:34:38,685 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 06:34:38,685 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 06:34:38,685 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 06:34:38,685 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 06:34:38,686 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 06:34:38,686 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 06:34:38,686 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 06:34:38,686 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 06:34:38,686 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 06:34:38,686 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 06:34:38,687 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_4aa250ff-8b9e-4052-a675-3dac6d0122a3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa250ff-8b9e-4052-a675-3dac6d0122a3/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4615816b63186e8ef25ffa56a09fb574b90534edb7a787dbb36e36eb2c34dee2 [2022-11-19 06:34:39,014 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 06:34:39,046 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 06:34:39,049 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 06:34:39,050 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 06:34:39,051 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 06:34:39,052 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa250ff-8b9e-4052-a675-3dac6d0122a3/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound10.c [2022-11-19 06:34:39,123 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa250ff-8b9e-4052-a675-3dac6d0122a3/bin/utaipan-I9t0OCRTmS/data/3322ccf8b/62383f2808394979a1feaf6eaaa9847f/FLAG58d13af89 [2022-11-19 06:34:39,663 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 06:34:39,664 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa250ff-8b9e-4052-a675-3dac6d0122a3/sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound10.c [2022-11-19 06:34:39,671 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa250ff-8b9e-4052-a675-3dac6d0122a3/bin/utaipan-I9t0OCRTmS/data/3322ccf8b/62383f2808394979a1feaf6eaaa9847f/FLAG58d13af89 [2022-11-19 06:34:40,034 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa250ff-8b9e-4052-a675-3dac6d0122a3/bin/utaipan-I9t0OCRTmS/data/3322ccf8b/62383f2808394979a1feaf6eaaa9847f [2022-11-19 06:34:40,037 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 06:34:40,040 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 06:34:40,044 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 06:34:40,044 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 06:34:40,048 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 06:34:40,048 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:34:40" (1/1) ... [2022-11-19 06:34:40,051 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@746f904b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:34:40, skipping insertion in model container [2022-11-19 06:34:40,052 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:34:40" (1/1) ... [2022-11-19 06:34:40,060 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 06:34:40,080 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 06:34:40,286 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_4aa250ff-8b9e-4052-a675-3dac6d0122a3/sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound10.c[520,533] [2022-11-19 06:34:40,302 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:34:40,311 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 06:34:40,323 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_4aa250ff-8b9e-4052-a675-3dac6d0122a3/sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound10.c[520,533] [2022-11-19 06:34:40,329 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:34:40,341 INFO L208 MainTranslator]: Completed translation [2022-11-19 06:34:40,342 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:34:40 WrapperNode [2022-11-19 06:34:40,342 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 06:34:40,343 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 06:34:40,343 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 06:34:40,343 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 06:34:40,350 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:34:40" (1/1) ... [2022-11-19 06:34:40,358 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:34:40" (1/1) ... [2022-11-19 06:34:40,374 INFO L138 Inliner]: procedures = 14, calls = 13, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 42 [2022-11-19 06:34:40,375 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 06:34:40,375 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 06:34:40,375 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 06:34:40,376 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 06:34:40,384 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:34:40" (1/1) ... [2022-11-19 06:34:40,384 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:34:40" (1/1) ... [2022-11-19 06:34:40,385 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:34:40" (1/1) ... [2022-11-19 06:34:40,385 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:34:40" (1/1) ... [2022-11-19 06:34:40,388 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:34:40" (1/1) ... [2022-11-19 06:34:40,391 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:34:40" (1/1) ... [2022-11-19 06:34:40,392 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:34:40" (1/1) ... [2022-11-19 06:34:40,393 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:34:40" (1/1) ... [2022-11-19 06:34:40,394 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 06:34:40,395 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 06:34:40,395 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 06:34:40,395 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 06:34:40,396 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:34:40" (1/1) ... [2022-11-19 06:34:40,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 06:34:40,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa250ff-8b9e-4052-a675-3dac6d0122a3/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:34:40,427 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa250ff-8b9e-4052-a675-3dac6d0122a3/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 06:34:40,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa250ff-8b9e-4052-a675-3dac6d0122a3/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 06:34:40,475 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 06:34:40,475 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 06:34:40,475 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 06:34:40,475 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 06:34:40,475 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-19 06:34:40,475 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-19 06:34:40,551 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 06:34:40,554 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 06:34:40,690 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 06:34:40,706 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 06:34:40,707 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-19 06:34:40,709 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:34:40 BoogieIcfgContainer [2022-11-19 06:34:40,710 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 06:34:40,712 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 06:34:40,712 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 06:34:40,716 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 06:34:40,716 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 06:34:40" (1/3) ... [2022-11-19 06:34:40,717 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38453eb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:34:40, skipping insertion in model container [2022-11-19 06:34:40,717 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:34:40" (2/3) ... [2022-11-19 06:34:40,718 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38453eb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:34:40, skipping insertion in model container [2022-11-19 06:34:40,718 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:34:40" (3/3) ... [2022-11-19 06:34:40,719 INFO L112 eAbstractionObserver]: Analyzing ICFG sqrt1-ll_unwindbound10.c [2022-11-19 06:34:40,735 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 06:34:40,735 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 06:34:40,782 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 06:34:40,789 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;@5bd2cd56, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 06:34:40,789 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 06:34:40,793 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-19 06:34:40,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-19 06:34:40,800 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:34:40,801 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-19 06:34:40,801 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:34:40,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:34:40,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1839711150, now seen corresponding path program 1 times [2022-11-19 06:34:40,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:34:40,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076686836] [2022-11-19 06:34:40,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:34:40,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:34:40,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:34:40,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:34:40,954 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:34:40,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076686836] [2022-11-19 06:34:40,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076686836] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:34:40,955 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:34:40,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 06:34:40,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561694259] [2022-11-19 06:34:40,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:34:40,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-19 06:34:40,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:34:40,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-19 06:34:40,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-19 06:34:40,995 INFO L87 Difference]: Start difference. First operand has 18 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:34:41,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:34:41,024 INFO L93 Difference]: Finished difference Result 35 states and 57 transitions. [2022-11-19 06:34:41,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-19 06:34:41,027 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-19 06:34:41,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:34:41,035 INFO L225 Difference]: With dead ends: 35 [2022-11-19 06:34:41,035 INFO L226 Difference]: Without dead ends: 16 [2022-11-19 06:34:41,039 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 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 06:34:41,042 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 06:34:41,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 06:34:41,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-11-19 06:34:41,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-11-19 06:34:41,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 8 states have (on average 1.375) internal successors, (11), 9 states have internal predecessors, (11), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-19 06:34:41,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2022-11-19 06:34:41,083 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 6 [2022-11-19 06:34:41,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:34:41,083 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2022-11-19 06:34:41,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:34:41,084 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2022-11-19 06:34:41,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 06:34:41,084 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:34:41,084 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:34:41,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 06:34:41,085 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:34:41,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:34:41,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1660498327, now seen corresponding path program 1 times [2022-11-19 06:34:41,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:34:41,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915906882] [2022-11-19 06:34:41,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:34:41,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:34:41,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:34:41,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:34:41,222 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:34:41,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915906882] [2022-11-19 06:34:41,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915906882] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:34:41,223 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:34:41,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 06:34:41,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900695648] [2022-11-19 06:34:41,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:34:41,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 06:34:41,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:34:41,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 06:34:41,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 06:34:41,226 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:34:41,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:34:41,250 INFO L93 Difference]: Finished difference Result 27 states and 35 transitions. [2022-11-19 06:34:41,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 06:34:41,250 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-19 06:34:41,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:34:41,251 INFO L225 Difference]: With dead ends: 27 [2022-11-19 06:34:41,251 INFO L226 Difference]: Without dead ends: 18 [2022-11-19 06:34:41,252 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 06:34:41,253 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 06:34:41,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 06:34:41,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-11-19 06:34:41,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-11-19 06:34:41,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-19 06:34:41,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 24 transitions. [2022-11-19 06:34:41,261 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 24 transitions. Word has length 7 [2022-11-19 06:34:41,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:34:41,262 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 24 transitions. [2022-11-19 06:34:41,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:34:41,262 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 24 transitions. [2022-11-19 06:34:41,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 06:34:41,263 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:34:41,263 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:34:41,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 06:34:41,264 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:34:41,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:34:41,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1658830031, now seen corresponding path program 1 times [2022-11-19 06:34:41,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:34:41,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538269914] [2022-11-19 06:34:41,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:34:41,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:34:41,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:34:41,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:34:41,593 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:34:41,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538269914] [2022-11-19 06:34:41,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538269914] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:34:41,593 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:34:41,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 06:34:41,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555971138] [2022-11-19 06:34:41,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:34:41,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 06:34:41,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:34:41,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 06:34:41,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 06:34:41,595 INFO L87 Difference]: Start difference. First operand 18 states and 24 transitions. Second operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:34:41,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:34:41,718 INFO L93 Difference]: Finished difference Result 31 states and 42 transitions. [2022-11-19 06:34:41,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 06:34:41,720 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-19 06:34:41,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:34:41,721 INFO L225 Difference]: With dead ends: 31 [2022-11-19 06:34:41,722 INFO L226 Difference]: Without dead ends: 29 [2022-11-19 06:34:41,722 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-19 06:34:41,723 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 7 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:34:41,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 62 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:34:41,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-19 06:34:41,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2022-11-19 06:34:41,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 16 states have internal predecessors, (18), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-19 06:34:41,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2022-11-19 06:34:41,739 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 7 [2022-11-19 06:34:41,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:34:41,740 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2022-11-19 06:34:41,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:34:41,740 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2022-11-19 06:34:41,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-19 06:34:41,742 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:34:41,742 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:34:41,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 06:34:41,743 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:34:41,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:34:41,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1386799727, now seen corresponding path program 1 times [2022-11-19 06:34:41,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:34:41,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140546088] [2022-11-19 06:34:41,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:34:41,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:34:41,774 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 06:34:41,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [449185913] [2022-11-19 06:34:41,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:34:41,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:34:41,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa250ff-8b9e-4052-a675-3dac6d0122a3/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:34:41,779 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa250ff-8b9e-4052-a675-3dac6d0122a3/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:34:41,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa250ff-8b9e-4052-a675-3dac6d0122a3/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 06:34:41,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:34:41,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 06:34:41,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:34:42,021 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:34:42,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:34:42,234 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:34:42,236 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:34:42,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140546088] [2022-11-19 06:34:42,237 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 06:34:42,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449185913] [2022-11-19 06:34:42,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449185913] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:34:42,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2032770794] [2022-11-19 06:34:42,264 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-19 06:34:42,264 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:34:42,268 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:34:42,274 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:34:42,275 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:34:42,459 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2022-11-19 06:34:42,485 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:34:42,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [2032770794] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:34:42,907 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 06:34:42,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 7] total 17 [2022-11-19 06:34:42,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653096026] [2022-11-19 06:34:42,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:34:42,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 06:34:42,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:34:42,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 06:34:42,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2022-11-19 06:34:42,924 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 06:34:43,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:34:43,113 INFO L93 Difference]: Finished difference Result 35 states and 45 transitions. [2022-11-19 06:34:43,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 06:34:43,114 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-11-19 06:34:43,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:34:43,117 INFO L225 Difference]: With dead ends: 35 [2022-11-19 06:34:43,117 INFO L226 Difference]: Without dead ends: 30 [2022-11-19 06:34:43,118 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2022-11-19 06:34:43,122 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 4 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:34:43,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 46 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:34:43,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-19 06:34:43,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-11-19 06:34:43,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-19 06:34:43,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2022-11-19 06:34:43,147 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 12 [2022-11-19 06:34:43,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:34:43,148 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2022-11-19 06:34:43,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 06:34:43,148 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2022-11-19 06:34:43,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-19 06:34:43,149 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:34:43,149 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:34:43,161 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa250ff-8b9e-4052-a675-3dac6d0122a3/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 06:34:43,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa250ff-8b9e-4052-a675-3dac6d0122a3/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:34:43,355 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:34:43,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:34:43,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1311551190, now seen corresponding path program 1 times [2022-11-19 06:34:43,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:34:43,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073773520] [2022-11-19 06:34:43,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:34:43,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:34:43,366 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 06:34:43,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [892400278] [2022-11-19 06:34:43,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:34:43,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:34:43,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa250ff-8b9e-4052-a675-3dac6d0122a3/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:34:43,368 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa250ff-8b9e-4052-a675-3dac6d0122a3/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:34:43,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa250ff-8b9e-4052-a675-3dac6d0122a3/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 06:34:43,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:34:43,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-19 06:34:43,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:34:43,467 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 06:34:43,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:34:43,513 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 06:34:43,513 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:34:43,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073773520] [2022-11-19 06:34:43,513 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 06:34:43,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892400278] [2022-11-19 06:34:43,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892400278] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:34:43,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1808248917] [2022-11-19 06:34:43,516 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-19 06:34:43,517 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:34:43,517 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:34:43,517 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:34:43,518 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:34:45,117 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 37 for LOIs [2022-11-19 06:34:45,219 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:34:45,797 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '597#(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 06:34:45,797 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:34:45,797 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 06:34:45,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2022-11-19 06:34:45,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130110859] [2022-11-19 06:34:45,798 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 06:34:45,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 06:34:45,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:34:45,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 06:34:45,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-11-19 06:34:45,800 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-19 06:34:45,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:34:45,959 INFO L93 Difference]: Finished difference Result 71 states and 92 transitions. [2022-11-19 06:34:45,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-19 06:34:45,960 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 25 [2022-11-19 06:34:45,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:34:45,961 INFO L225 Difference]: With dead ends: 71 [2022-11-19 06:34:45,961 INFO L226 Difference]: Without dead ends: 62 [2022-11-19 06:34:45,962 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2022-11-19 06:34:45,963 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 47 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:34:45,963 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 115 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:34:45,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-11-19 06:34:45,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 58. [2022-11-19 06:34:45,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 34 states have internal predecessors, (38), 21 states have call successors, (21), 5 states have call predecessors, (21), 5 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-11-19 06:34:45,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 77 transitions. [2022-11-19 06:34:45,981 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 77 transitions. Word has length 25 [2022-11-19 06:34:45,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:34:45,982 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 77 transitions. [2022-11-19 06:34:45,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-19 06:34:45,982 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 77 transitions. [2022-11-19 06:34:45,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-19 06:34:45,983 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:34:45,983 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:34:45,995 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa250ff-8b9e-4052-a675-3dac6d0122a3/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 06:34:46,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa250ff-8b9e-4052-a675-3dac6d0122a3/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:34:46,184 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:34:46,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:34:46,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1309882894, now seen corresponding path program 1 times [2022-11-19 06:34:46,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:34:46,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924968533] [2022-11-19 06:34:46,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:34:46,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:34:46,193 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 06:34:46,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [539377963] [2022-11-19 06:34:46,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:34:46,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:34:46,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa250ff-8b9e-4052-a675-3dac6d0122a3/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:34:46,195 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa250ff-8b9e-4052-a675-3dac6d0122a3/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:34:46,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa250ff-8b9e-4052-a675-3dac6d0122a3/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 06:34:46,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:34:46,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 06:34:46,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:34:46,317 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 06:34:46,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:34:46,368 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-19 06:34:46,368 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:34:46,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924968533] [2022-11-19 06:34:46,369 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 06:34:46,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539377963] [2022-11-19 06:34:46,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539377963] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-19 06:34:46,369 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 06:34:46,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2022-11-19 06:34:46,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678724756] [2022-11-19 06:34:46,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:34:46,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 06:34:46,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:34:46,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 06:34:46,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-19 06:34:46,371 INFO L87 Difference]: Start difference. First operand 58 states and 77 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-19 06:34:46,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:34:46,425 INFO L93 Difference]: Finished difference Result 72 states and 90 transitions. [2022-11-19 06:34:46,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 06:34:46,426 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 25 [2022-11-19 06:34:46,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:34:46,427 INFO L225 Difference]: With dead ends: 72 [2022-11-19 06:34:46,427 INFO L226 Difference]: Without dead ends: 70 [2022-11-19 06:34:46,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-19 06:34:46,428 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 8 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 06:34:46,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 38 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 06:34:46,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-11-19 06:34:46,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2022-11-19 06:34:46,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 40 states have (on average 1.175) internal successors, (47), 43 states have internal predecessors, (47), 21 states have call successors, (21), 8 states have call predecessors, (21), 8 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-11-19 06:34:46,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 86 transitions. [2022-11-19 06:34:46,443 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 86 transitions. Word has length 25 [2022-11-19 06:34:46,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:34:46,444 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 86 transitions. [2022-11-19 06:34:46,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-19 06:34:46,444 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 86 transitions. [2022-11-19 06:34:46,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-19 06:34:46,445 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:34:46,445 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:34:46,456 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa250ff-8b9e-4052-a675-3dac6d0122a3/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-19 06:34:46,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa250ff-8b9e-4052-a675-3dac6d0122a3/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-19 06:34:46,651 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:34:46,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:34:46,651 INFO L85 PathProgramCache]: Analyzing trace with hash 2092232782, now seen corresponding path program 2 times [2022-11-19 06:34:46,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:34:46,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366372120] [2022-11-19 06:34:46,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:34:46,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:34:46,659 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 06:34:46,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2089863226] [2022-11-19 06:34:46,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 06:34:46,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:34:46,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa250ff-8b9e-4052-a675-3dac6d0122a3/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:34:46,661 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa250ff-8b9e-4052-a675-3dac6d0122a3/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:34:46,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa250ff-8b9e-4052-a675-3dac6d0122a3/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 06:34:46,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-19 06:34:46,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:34:46,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-19 06:34:46,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:34:46,867 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-19 06:34:46,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:34:47,033 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-19 06:34:47,033 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:34:47,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366372120] [2022-11-19 06:34:47,034 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 06:34:47,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089863226] [2022-11-19 06:34:47,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089863226] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:34:47,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [368264169] [2022-11-19 06:34:47,037 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-19 06:34:47,038 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:34:47,039 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:34:47,039 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:34:47,039 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:34:48,239 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 13 for LOIs [2022-11-19 06:34:48,244 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:34:48,699 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1360#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= ~counter~0 11) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 06:34:48,699 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:34:48,700 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 06:34:48,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2022-11-19 06:34:48,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47506416] [2022-11-19 06:34:48,700 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 06:34:48,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-19 06:34:48,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:34:48,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-19 06:34:48,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2022-11-19 06:34:48,702 INFO L87 Difference]: Start difference. First operand 70 states and 86 transitions. Second operand has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-19 06:34:49,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:34:49,024 INFO L93 Difference]: Finished difference Result 81 states and 97 transitions. [2022-11-19 06:34:49,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-19 06:34:49,024 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 30 [2022-11-19 06:34:49,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:34:49,027 INFO L225 Difference]: With dead ends: 81 [2022-11-19 06:34:49,027 INFO L226 Difference]: Without dead ends: 76 [2022-11-19 06:34:49,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2022-11-19 06:34:49,028 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 26 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:34:49,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 57 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 06:34:49,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-11-19 06:34:49,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2022-11-19 06:34:49,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 46 states have (on average 1.108695652173913) internal successors, (51), 48 states have internal predecessors, (51), 18 states have call successors, (18), 10 states have call predecessors, (18), 10 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-19 06:34:49,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 85 transitions. [2022-11-19 06:34:49,059 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 85 transitions. Word has length 30 [2022-11-19 06:34:49,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:34:49,060 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 85 transitions. [2022-11-19 06:34:49,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-19 06:34:49,060 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 85 transitions. [2022-11-19 06:34:49,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-19 06:34:49,064 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:34:49,064 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1] [2022-11-19 06:34:49,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa250ff-8b9e-4052-a675-3dac6d0122a3/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 06:34:49,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa250ff-8b9e-4052-a675-3dac6d0122a3/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-19 06:34:49,269 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:34:49,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:34:49,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1503837811, now seen corresponding path program 3 times [2022-11-19 06:34:49,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:34:49,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205228389] [2022-11-19 06:34:49,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:34:49,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:34:49,294 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 06:34:49,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [668859408] [2022-11-19 06:34:49,295 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 06:34:49,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:34:49,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa250ff-8b9e-4052-a675-3dac6d0122a3/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:34:49,304 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa250ff-8b9e-4052-a675-3dac6d0122a3/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:34:49,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa250ff-8b9e-4052-a675-3dac6d0122a3/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 06:34:49,392 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 06:34:49,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:34:49,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-19 06:34:49,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:34:51,656 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 38 proven. 36 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-11-19 06:34:51,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:34:56,758 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 56 proven. 8 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-11-19 06:34:56,758 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:34:56,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205228389] [2022-11-19 06:34:56,759 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 06:34:56,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668859408] [2022-11-19 06:34:56,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668859408] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:34:56,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [912373114] [2022-11-19 06:34:56,762 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-19 06:34:56,763 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:34:56,763 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:34:56,764 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:34:56,764 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:34:57,888 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 13 for LOIs [2022-11-19 06:34:57,893 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:35:02,303 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1925#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= ~counter~0 11) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 06:35:02,303 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:35:02,304 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 06:35:02,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2022-11-19 06:35:02,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270011267] [2022-11-19 06:35:02,304 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 06:35:02,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-19 06:35:02,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:35:02,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-19 06:35:02,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=413, Unknown=2, NotChecked=0, Total=506 [2022-11-19 06:35:02,306 INFO L87 Difference]: Start difference. First operand 75 states and 85 transitions. Second operand has 14 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (13), 7 states have call predecessors, (13), 5 states have call successors, (13) [2022-11-19 06:35:08,404 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 06:35:09,927 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 06:35:11,946 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 06:35:13,975 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 06:35:16,806 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.91s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 06:35:18,851 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 06:35:18,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:35:18,865 INFO L93 Difference]: Finished difference Result 78 states and 90 transitions. [2022-11-19 06:35:18,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 06:35:18,866 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (13), 7 states have call predecessors, (13), 5 states have call successors, (13) Word has length 53 [2022-11-19 06:35:18,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:35:18,866 INFO L225 Difference]: With dead ends: 78 [2022-11-19 06:35:18,866 INFO L226 Difference]: Without dead ends: 0 [2022-11-19 06:35:18,867 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 133 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=108, Invalid=490, Unknown=2, NotChecked=0, Total=600 [2022-11-19 06:35:18,868 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 17 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 24 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.5s IncrementalHoareTripleChecker+Time [2022-11-19 06:35:18,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 28 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 108 Invalid, 4 Unknown, 0 Unchecked, 13.5s Time] [2022-11-19 06:35:18,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-19 06:35:18,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-19 06:35:18,869 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 06:35:18,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-19 06:35:18,869 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 53 [2022-11-19 06:35:18,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:35:18,869 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-19 06:35:18,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (13), 7 states have call predecessors, (13), 5 states have call successors, (13) [2022-11-19 06:35:18,870 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-19 06:35:18,870 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-19 06:35:18,872 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-19 06:35:18,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa250ff-8b9e-4052-a675-3dac6d0122a3/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-19 06:35:19,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa250ff-8b9e-4052-a675-3dac6d0122a3/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:35:19,081 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-11-19 06:35:19,361 INFO L899 garLoopResultBuilder]: For program point L33(lines 30 42) no Hoare annotation was computed. [2022-11-19 06:35:19,361 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-11-19 06:35:19,362 INFO L895 garLoopResultBuilder]: At program point L31(line 31) the Hoare annotation is: (let ((.cse0 (* 2 |ULTIMATE.start_main_~a~0#1|))) (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 .cse0)) (= (+ (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~a~0#1|) 1 .cse0) |ULTIMATE.start_main_~s~0#1|))) [2022-11-19 06:35:19,362 INFO L895 garLoopResultBuilder]: At program point L31-1(line 31) the Hoare annotation is: (let ((.cse0 (* 2 |ULTIMATE.start_main_~a~0#1|))) (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 .cse0)) (= (+ (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~a~0#1|) 1 .cse0) |ULTIMATE.start_main_~s~0#1|))) [2022-11-19 06:35:19,362 INFO L902 garLoopResultBuilder]: At program point L46(line 46) the Hoare annotation is: true [2022-11-19 06:35:19,362 INFO L895 garLoopResultBuilder]: At program point L44(line 44) the Hoare annotation is: (let ((.cse0 (* 2 |ULTIMATE.start_main_~a~0#1|))) (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 .cse0)) (= (+ (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~a~0#1|) 1 .cse0) |ULTIMATE.start_main_~s~0#1|))) [2022-11-19 06:35:19,362 INFO L895 garLoopResultBuilder]: At program point L32(line 32) the Hoare annotation is: (let ((.cse0 (* 2 |ULTIMATE.start_main_~a~0#1|))) (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 .cse0)) (= (+ (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~a~0#1|) 1 .cse0) |ULTIMATE.start_main_~s~0#1|))) [2022-11-19 06:35:19,363 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2022-11-19 06:35:19,363 INFO L899 garLoopResultBuilder]: For program point L30-1(lines 30 42) no Hoare annotation was computed. [2022-11-19 06:35:19,363 INFO L895 garLoopResultBuilder]: At program point L30-3(lines 30 42) the Hoare annotation is: (let ((.cse0 (* 2 |ULTIMATE.start_main_~a~0#1|))) (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 .cse0)) (= (+ (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~a~0#1|) 1 .cse0) |ULTIMATE.start_main_~s~0#1|))) [2022-11-19 06:35:19,363 INFO L895 garLoopResultBuilder]: At program point L30-4(lines 30 42) the Hoare annotation is: (let ((.cse0 (* 2 |ULTIMATE.start_main_~a~0#1|))) (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 .cse0)) (= (+ (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~a~0#1|) 1 .cse0) |ULTIMATE.start_main_~s~0#1|))) [2022-11-19 06:35:19,363 INFO L895 garLoopResultBuilder]: At program point L45(line 45) the Hoare annotation is: (let ((.cse0 (* 2 |ULTIMATE.start_main_~a~0#1|))) (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 .cse0)) (= (+ (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~a~0#1|) 1 .cse0) |ULTIMATE.start_main_~s~0#1|))) [2022-11-19 06:35:19,364 INFO L902 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 11 17) the Hoare annotation is: true [2022-11-19 06:35:19,364 INFO L899 garLoopResultBuilder]: For program point L13(lines 13 14) no Hoare annotation was computed. [2022-11-19 06:35:19,364 INFO L899 garLoopResultBuilder]: For program point L12(lines 12 15) no Hoare annotation was computed. [2022-11-19 06:35:19,364 INFO L899 garLoopResultBuilder]: For program point L12-2(lines 11 17) no Hoare annotation was computed. [2022-11-19 06:35:19,364 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 11 17) no Hoare annotation was computed. [2022-11-19 06:35:19,364 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2022-11-19 06:35:19,368 INFO L444 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1] [2022-11-19 06:35:19,370 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-19 06:35:19,383 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 06:35:19 BoogieIcfgContainer [2022-11-19 06:35:19,383 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-19 06:35:19,384 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-19 06:35:19,384 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-19 06:35:19,384 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-19 06:35:19,385 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:34:40" (3/4) ... [2022-11-19 06:35:19,387 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-11-19 06:35:19,393 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2022-11-19 06:35:19,397 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2022-11-19 06:35:19,397 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2022-11-19 06:35:19,397 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2022-11-19 06:35:19,397 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-11-19 06:35:19,427 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa250ff-8b9e-4052-a675-3dac6d0122a3/bin/utaipan-I9t0OCRTmS/witness.graphml [2022-11-19 06:35:19,427 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-19 06:35:19,428 INFO L158 Benchmark]: Toolchain (without parser) took 39388.20ms. Allocated memory was 155.2MB in the beginning and 270.5MB in the end (delta: 115.3MB). Free memory was 130.2MB in the beginning and 188.6MB in the end (delta: -58.4MB). Peak memory consumption was 57.0MB. Max. memory is 16.1GB. [2022-11-19 06:35:19,428 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 100.7MB. Free memory is still 57.3MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-19 06:35:19,428 INFO L158 Benchmark]: CACSL2BoogieTranslator took 298.36ms. Allocated memory is still 155.2MB. Free memory was 130.2MB in the beginning and 130.1MB in the end (delta: 133.2kB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-19 06:35:19,429 INFO L158 Benchmark]: Boogie Procedure Inliner took 32.13ms. Allocated memory is still 155.2MB. Free memory was 129.7MB in the beginning and 128.4MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-19 06:35:19,429 INFO L158 Benchmark]: Boogie Preprocessor took 18.73ms. Allocated memory is still 155.2MB. Free memory was 128.4MB in the beginning and 127.2MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-19 06:35:19,429 INFO L158 Benchmark]: RCFGBuilder took 314.94ms. Allocated memory is still 155.2MB. Free memory was 127.2MB in the beginning and 116.7MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-19 06:35:19,430 INFO L158 Benchmark]: TraceAbstraction took 38671.28ms. Allocated memory was 155.2MB in the beginning and 270.5MB in the end (delta: 115.3MB). Free memory was 115.8MB in the beginning and 190.7MB in the end (delta: -74.9MB). Peak memory consumption was 42.2MB. Max. memory is 16.1GB. [2022-11-19 06:35:19,430 INFO L158 Benchmark]: Witness Printer took 43.57ms. Allocated memory is still 270.5MB. Free memory was 190.7MB in the beginning and 188.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-19 06:35:19,432 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 100.7MB. Free memory is still 57.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 298.36ms. Allocated memory is still 155.2MB. Free memory was 130.2MB in the beginning and 130.1MB in the end (delta: 133.2kB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 32.13ms. Allocated memory is still 155.2MB. Free memory was 129.7MB in the beginning and 128.4MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 18.73ms. Allocated memory is still 155.2MB. Free memory was 128.4MB in the beginning and 127.2MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 314.94ms. Allocated memory is still 155.2MB. Free memory was 127.2MB in the beginning and 116.7MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 38671.28ms. Allocated memory was 155.2MB in the beginning and 270.5MB in the end (delta: 115.3MB). Free memory was 115.8MB in the beginning and 190.7MB in the end (delta: -74.9MB). Peak memory consumption was 42.2MB. Max. memory is 16.1GB. * Witness Printer took 43.57ms. Allocated memory is still 270.5MB. Free memory was 190.7MB in the beginning and 188.6MB in the end (delta: 2.1MB). 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: 14]: 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 2 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 38.6s, OverallIterations: 8, TraceHistogramMax: 9, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 17.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 4 mSolverCounterUnknown, 131 SdHoareTripleChecker+Valid, 14.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 109 mSDsluCounter, 424 SdHoareTripleChecker+Invalid, 14.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 269 mSDsCounter, 90 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 542 IncrementalHoareTripleChecker+Invalid, 636 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 90 mSolverCounterUnsat, 155 mSDtfsCounter, 542 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 419 GetRequests, 316 SyntacticMatches, 10 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 16.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=75occurred in iteration=7, InterpolantAutomatonStates: 51, 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, 8 MinimizatonAttempts, 7 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 47 PreInvPairs, 77 NumberOfFragments, 128 HoareAnnotationTreeSize, 47 FomulaSimplifications, 163 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 1682 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 8.7s InterpolantComputationTime, 165 NumberOfCodeBlocks, 154 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 297 ConstructedInterpolants, 0 QuantifiedInterpolants, 1420 SizeOfPredicates, 14 NumberOfNonLiveVariables, 425 ConjunctsInSsa, 97 ConjunctsInUnsatCore, 13 InterpolantComputations, 4 PerfectInterpolantSequences, 387/446 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: 0.2s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 2, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 10, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 10, TOOLS_POST_TIME: 0.1s, TOOLS_POST_CALL_APPLICATIONS: 4, TOOLS_POST_CALL_TIME: 0.0s, TOOLS_POST_RETURN_APPLICATIONS: 2, TOOLS_POST_RETURN_TIME: 0.0s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 16, TOOLS_QUANTIFIERELIM_TIME: 0.1s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.0s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 27, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 3, DOMAIN_JOIN_TIME: 0.0s, 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: 10, 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: 2, CALL_SUMMARIZER_CACHE_MISSES: 1, 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: 56, DAG_COMPRESSION_RETAINED_NODES: 31, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 46]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 30]: Loop Invariant Derived loop invariant: t == 1 + 2 * a && a * a + 1 + 2 * a == s RESULT: Ultimate proved your program to be correct! [2022-11-19 06:35:19,479 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa250ff-8b9e-4052-a675-3dac6d0122a3/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE