./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 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_6f249061-bdb8-459b-9b76-d8aa9c27c1ba/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f249061-bdb8-459b-9b76-d8aa9c27c1ba/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f249061-bdb8-459b-9b76-d8aa9c27c1ba/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f249061-bdb8-459b-9b76-d8aa9c27c1ba/bin/utaipan-g80aRyZoba/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound50.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f249061-bdb8-459b-9b76-d8aa9c27c1ba/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f249061-bdb8-459b-9b76-d8aa9c27c1ba/bin/utaipan-g80aRyZoba --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 6c37a77a9f4db0db15bb3c5a5baacfcd5e1536d243d9987efda949cfc27e3fb7 --- 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-b5237d8 [2022-11-22 00:19:17,579 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 00:19:17,581 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 00:19:17,622 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 00:19:17,622 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 00:19:17,623 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 00:19:17,625 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 00:19:17,627 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 00:19:17,628 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 00:19:17,629 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 00:19:17,630 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 00:19:17,636 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 00:19:17,636 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 00:19:17,637 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 00:19:17,638 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 00:19:17,639 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 00:19:17,640 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 00:19:17,641 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 00:19:17,642 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 00:19:17,644 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 00:19:17,646 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 00:19:17,654 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 00:19:17,657 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 00:19:17,658 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 00:19:17,667 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 00:19:17,668 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 00:19:17,668 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 00:19:17,669 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 00:19:17,669 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 00:19:17,670 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 00:19:17,671 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 00:19:17,671 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 00:19:17,672 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 00:19:17,673 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 00:19:17,674 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 00:19:17,674 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 00:19:17,674 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 00:19:17,680 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 00:19:17,681 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 00:19:17,686 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 00:19:17,687 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 00:19:17,688 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f249061-bdb8-459b-9b76-d8aa9c27c1ba/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-22 00:19:17,726 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 00:19:17,730 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 00:19:17,731 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 00:19:17,731 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 00:19:17,732 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 00:19:17,732 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 00:19:17,732 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 00:19:17,733 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 00:19:17,733 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 00:19:17,733 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 00:19:17,734 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 00:19:17,734 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 00:19:17,735 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 00:19:17,735 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 00:19:17,735 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 00:19:17,735 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 00:19:17,736 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 00:19:17,736 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 00:19:17,736 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 00:19:17,737 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 00:19:17,737 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 00:19:17,737 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 00:19:17,737 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 00:19:17,738 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 00:19:17,738 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 00:19:17,738 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 00:19:17,738 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 00:19:17,738 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 00:19:17,739 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 00:19:17,739 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 00:19:17,739 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 00:19:17,740 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 00:19:17,740 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 00:19:17,740 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 00:19:17,740 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 00:19:17,741 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 00:19:17,741 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 00:19:17,741 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 00:19:17,741 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 00:19:17,741 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 00:19:17,742 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 00:19:17,742 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_6f249061-bdb8-459b-9b76-d8aa9c27c1ba/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f249061-bdb8-459b-9b76-d8aa9c27c1ba/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6c37a77a9f4db0db15bb3c5a5baacfcd5e1536d243d9987efda949cfc27e3fb7 [2022-11-22 00:19:18,053 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 00:19:18,086 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 00:19:18,089 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 00:19:18,091 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 00:19:18,095 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 00:19:18,096 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f249061-bdb8-459b-9b76-d8aa9c27c1ba/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound50.c [2022-11-22 00:19:21,148 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 00:19:21,413 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 00:19:21,414 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f249061-bdb8-459b-9b76-d8aa9c27c1ba/sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound50.c [2022-11-22 00:19:21,421 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f249061-bdb8-459b-9b76-d8aa9c27c1ba/bin/utaipan-g80aRyZoba/data/e50cfadea/4fcc66165f544787bf92e80a1fe8e023/FLAG7d884123b [2022-11-22 00:19:21,437 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f249061-bdb8-459b-9b76-d8aa9c27c1ba/bin/utaipan-g80aRyZoba/data/e50cfadea/4fcc66165f544787bf92e80a1fe8e023 [2022-11-22 00:19:21,443 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 00:19:21,446 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 00:19:21,449 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 00:19:21,450 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 00:19:21,453 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 00:19:21,454 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:19:21" (1/1) ... [2022-11-22 00:19:21,455 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f51d00d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:19:21, skipping insertion in model container [2022-11-22 00:19:21,456 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:19:21" (1/1) ... [2022-11-22 00:19:21,464 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 00:19:21,482 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 00:19:21,662 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f249061-bdb8-459b-9b76-d8aa9c27c1ba/sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound50.c[520,533] [2022-11-22 00:19:21,679 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 00:19:21,687 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 00:19:21,698 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f249061-bdb8-459b-9b76-d8aa9c27c1ba/sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound50.c[520,533] [2022-11-22 00:19:21,706 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 00:19:21,720 INFO L208 MainTranslator]: Completed translation [2022-11-22 00:19:21,720 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:19:21 WrapperNode [2022-11-22 00:19:21,720 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 00:19:21,722 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 00:19:21,722 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 00:19:21,722 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 00:19:21,729 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:19:21" (1/1) ... [2022-11-22 00:19:21,737 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:19:21" (1/1) ... [2022-11-22 00:19:21,756 INFO L138 Inliner]: procedures = 14, calls = 13, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 42 [2022-11-22 00:19:21,757 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 00:19:21,757 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 00:19:21,758 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 00:19:21,758 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 00:19:21,765 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:19:21" (1/1) ... [2022-11-22 00:19:21,765 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:19:21" (1/1) ... [2022-11-22 00:19:21,766 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:19:21" (1/1) ... [2022-11-22 00:19:21,766 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:19:21" (1/1) ... [2022-11-22 00:19:21,777 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:19:21" (1/1) ... [2022-11-22 00:19:21,781 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:19:21" (1/1) ... [2022-11-22 00:19:21,784 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:19:21" (1/1) ... [2022-11-22 00:19:21,784 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:19:21" (1/1) ... [2022-11-22 00:19:21,786 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 00:19:21,787 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 00:19:21,787 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 00:19:21,788 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 00:19:21,789 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:19:21" (1/1) ... [2022-11-22 00:19:21,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 00:19:21,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f249061-bdb8-459b-9b76-d8aa9c27c1ba/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:19:21,819 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f249061-bdb8-459b-9b76-d8aa9c27c1ba/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 00:19:21,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f249061-bdb8-459b-9b76-d8aa9c27c1ba/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 00:19:21,853 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 00:19:21,853 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 00:19:21,853 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 00:19:21,853 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 00:19:21,854 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-22 00:19:21,854 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-22 00:19:21,921 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 00:19:21,924 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 00:19:22,120 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 00:19:22,135 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 00:19:22,136 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-22 00:19:22,138 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:19:22 BoogieIcfgContainer [2022-11-22 00:19:22,139 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 00:19:22,141 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 00:19:22,142 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 00:19:22,145 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 00:19:22,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 12:19:21" (1/3) ... [2022-11-22 00:19:22,146 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1214b3b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:19:22, skipping insertion in model container [2022-11-22 00:19:22,147 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:19:21" (2/3) ... [2022-11-22 00:19:22,147 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1214b3b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:19:22, skipping insertion in model container [2022-11-22 00:19:22,147 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:19:22" (3/3) ... [2022-11-22 00:19:22,149 INFO L112 eAbstractionObserver]: Analyzing ICFG sqrt1-ll_unwindbound50.c [2022-11-22 00:19:22,178 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 00:19:22,179 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-22 00:19:22,254 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 00:19:22,262 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;@616d8fa1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 00:19:22,262 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-22 00:19:22,267 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) [2022-11-22 00:19:22,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-22 00:19:22,274 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:19:22,275 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-22 00:19:22,275 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:19:22,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:19:22,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1839711150, now seen corresponding path program 1 times [2022-11-22 00:19:22,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:19:22,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292213032] [2022-11-22 00:19:22,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:19:22,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:19:22,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:19:22,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:19:22,493 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:19:22,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292213032] [2022-11-22 00:19:22,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292213032] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:19:22,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:19:22,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 00:19:22,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112501147] [2022-11-22 00:19:22,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:19:22,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-22 00:19:22,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:19:22,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-22 00:19:22,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-22 00:19:22,553 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) [2022-11-22 00:19:22,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:19:22,593 INFO L93 Difference]: Finished difference Result 35 states and 57 transitions. [2022-11-22 00:19:22,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-22 00:19:22,597 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 [2022-11-22 00:19:22,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:19:22,605 INFO L225 Difference]: With dead ends: 35 [2022-11-22 00:19:22,605 INFO L226 Difference]: Without dead ends: 16 [2022-11-22 00:19:22,609 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 [2022-11-22 00:19:22,616 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 [2022-11-22 00:19:22,617 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] [2022-11-22 00:19:22,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-11-22 00:19:22,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-11-22 00:19:22,657 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) [2022-11-22 00:19:22,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2022-11-22 00:19:22,661 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 6 [2022-11-22 00:19:22,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:19:22,662 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2022-11-22 00:19:22,663 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) [2022-11-22 00:19:22,663 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2022-11-22 00:19:22,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-22 00:19:22,664 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:19:22,664 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:19:22,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 00:19:22,665 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:19:22,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:19:22,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1660498327, now seen corresponding path program 1 times [2022-11-22 00:19:22,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:19:22,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223983572] [2022-11-22 00:19:22,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:19:22,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:19:22,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:19:22,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:19:22,795 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:19:22,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223983572] [2022-11-22 00:19:22,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223983572] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:19:22,796 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:19:22,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 00:19:22,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988684526] [2022-11-22 00:19:22,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:19:22,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 00:19:22,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:19:22,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 00:19:22,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 00:19:22,799 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) [2022-11-22 00:19:22,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:19:22,820 INFO L93 Difference]: Finished difference Result 27 states and 35 transitions. [2022-11-22 00:19:22,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 00:19:22,821 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 [2022-11-22 00:19:22,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:19:22,822 INFO L225 Difference]: With dead ends: 27 [2022-11-22 00:19:22,822 INFO L226 Difference]: Without dead ends: 18 [2022-11-22 00:19:22,823 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 [2022-11-22 00:19:22,824 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 [2022-11-22 00:19:22,825 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] [2022-11-22 00:19:22,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-11-22 00:19:22,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-11-22 00:19:22,830 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) [2022-11-22 00:19:22,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 24 transitions. [2022-11-22 00:19:22,831 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 24 transitions. Word has length 7 [2022-11-22 00:19:22,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:19:22,832 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 24 transitions. [2022-11-22 00:19:22,832 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) [2022-11-22 00:19:22,832 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 24 transitions. [2022-11-22 00:19:22,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-22 00:19:22,833 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:19:22,833 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:19:22,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-22 00:19:22,834 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:19:22,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:19:22,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1658830031, now seen corresponding path program 1 times [2022-11-22 00:19:22,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:19:22,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832527417] [2022-11-22 00:19:22,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:19:22,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:19:22,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:19:23,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:19:23,037 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:19:23,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832527417] [2022-11-22 00:19:23,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832527417] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:19:23,038 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:19:23,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 00:19:23,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411541447] [2022-11-22 00:19:23,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:19:23,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 00:19:23,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:19:23,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 00:19:23,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 00:19:23,040 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) [2022-11-22 00:19:23,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:19:23,152 INFO L93 Difference]: Finished difference Result 31 states and 42 transitions. [2022-11-22 00:19:23,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 00:19:23,157 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 [2022-11-22 00:19:23,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:19:23,158 INFO L225 Difference]: With dead ends: 31 [2022-11-22 00:19:23,158 INFO L226 Difference]: Without dead ends: 29 [2022-11-22 00:19:23,159 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 [2022-11-22 00:19:23,160 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 [2022-11-22 00:19:23,160 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] [2022-11-22 00:19:23,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-22 00:19:23,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2022-11-22 00:19:23,174 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) [2022-11-22 00:19:23,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2022-11-22 00:19:23,175 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 7 [2022-11-22 00:19:23,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:19:23,175 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2022-11-22 00:19:23,176 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) [2022-11-22 00:19:23,176 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2022-11-22 00:19:23,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-22 00:19:23,176 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:19:23,177 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:19:23,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-22 00:19:23,177 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:19:23,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:19:23,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1386799727, now seen corresponding path program 1 times [2022-11-22 00:19:23,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:19:23,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567588620] [2022-11-22 00:19:23,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:19:23,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:19:23,195 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 00:19:23,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [916640553] [2022-11-22 00:19:23,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:19:23,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:19:23,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f249061-bdb8-459b-9b76-d8aa9c27c1ba/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:19:23,200 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f249061-bdb8-459b-9b76-d8aa9c27c1ba/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:19:23,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f249061-bdb8-459b-9b76-d8aa9c27c1ba/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 00:19:23,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:19:23,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-22 00:19:23,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:19:23,563 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:19:23,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:19:23,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:19:23,749 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:19:23,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567588620] [2022-11-22 00:19:23,750 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 00:19:23,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916640553] [2022-11-22 00:19:23,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916640553] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:19:23,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1717312308] [2022-11-22 00:19:23,769 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-22 00:19:23,769 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:19:23,773 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:19:23,779 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:19:23,779 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:19:23,967 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2022-11-22 00:19:23,987 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:19:24,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1717312308] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:19:24,439 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-22 00:19:24,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 7] total 17 [2022-11-22 00:19:24,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551019731] [2022-11-22 00:19:24,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:19:24,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 00:19:24,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:19:24,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 00:19:24,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2022-11-22 00:19:24,442 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) [2022-11-22 00:19:24,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:19:24,590 INFO L93 Difference]: Finished difference Result 35 states and 45 transitions. [2022-11-22 00:19:24,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 00:19:24,591 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 [2022-11-22 00:19:24,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:19:24,594 INFO L225 Difference]: With dead ends: 35 [2022-11-22 00:19:24,594 INFO L226 Difference]: Without dead ends: 30 [2022-11-22 00:19:24,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2022-11-22 00:19:24,600 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 [2022-11-22 00:19:24,603 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] [2022-11-22 00:19:24,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-22 00:19:24,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-11-22 00:19:24,631 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) [2022-11-22 00:19:24,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2022-11-22 00:19:24,635 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 12 [2022-11-22 00:19:24,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:19:24,636 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2022-11-22 00:19:24,636 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) [2022-11-22 00:19:24,636 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2022-11-22 00:19:24,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-22 00:19:24,638 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:19:24,638 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:19:24,652 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f249061-bdb8-459b-9b76-d8aa9c27c1ba/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-22 00:19:24,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f249061-bdb8-459b-9b76-d8aa9c27c1ba/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:19:24,844 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:19:24,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:19:24,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1311551190, now seen corresponding path program 1 times [2022-11-22 00:19:24,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:19:24,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602177718] [2022-11-22 00:19:24,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:19:24,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:19:24,870 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 00:19:24,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2059889536] [2022-11-22 00:19:24,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:19:24,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:19:24,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f249061-bdb8-459b-9b76-d8aa9c27c1ba/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:19:24,872 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f249061-bdb8-459b-9b76-d8aa9c27c1ba/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:19:24,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f249061-bdb8-459b-9b76-d8aa9c27c1ba/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-22 00:19:24,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:19:24,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-22 00:19:24,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:19:24,996 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 00:19:24,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:19:25,040 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 00:19:25,040 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:19:25,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602177718] [2022-11-22 00:19:25,041 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 00:19:25,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059889536] [2022-11-22 00:19:25,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059889536] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:19:25,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1718911775] [2022-11-22 00:19:25,043 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-22 00:19:25,044 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:19:25,044 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:19:25,044 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:19:25,044 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:19:26,512 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 37 for LOIs [2022-11-22 00:19:26,616 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:19:27,126 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 [2022-11-22 00:19:27,126 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:19:27,126 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 00:19:27,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2022-11-22 00:19:27,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023387991] [2022-11-22 00:19:27,127 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 00:19:27,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-22 00:19:27,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:19:27,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-22 00:19:27,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-11-22 00:19:27,128 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) [2022-11-22 00:19:27,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:19:27,267 INFO L93 Difference]: Finished difference Result 71 states and 92 transitions. [2022-11-22 00:19:27,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-22 00:19:27,267 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 [2022-11-22 00:19:27,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:19:27,268 INFO L225 Difference]: With dead ends: 71 [2022-11-22 00:19:27,269 INFO L226 Difference]: Without dead ends: 62 [2022-11-22 00:19:27,269 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 [2022-11-22 00:19:27,270 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 [2022-11-22 00:19:27,270 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] [2022-11-22 00:19:27,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-11-22 00:19:27,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 58. [2022-11-22 00:19:27,283 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) [2022-11-22 00:19:27,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 77 transitions. [2022-11-22 00:19:27,285 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 77 transitions. Word has length 25 [2022-11-22 00:19:27,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:19:27,285 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 77 transitions. [2022-11-22 00:19:27,286 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) [2022-11-22 00:19:27,286 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 77 transitions. [2022-11-22 00:19:27,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-22 00:19:27,286 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:19:27,287 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:19:27,298 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f249061-bdb8-459b-9b76-d8aa9c27c1ba/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-22 00:19:27,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f249061-bdb8-459b-9b76-d8aa9c27c1ba/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:19:27,493 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:19:27,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:19:27,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1309882894, now seen corresponding path program 1 times [2022-11-22 00:19:27,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:19:27,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944637112] [2022-11-22 00:19:27,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:19:27,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:19:27,503 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 00:19:27,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1307573993] [2022-11-22 00:19:27,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:19:27,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:19:27,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f249061-bdb8-459b-9b76-d8aa9c27c1ba/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:19:27,505 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f249061-bdb8-459b-9b76-d8aa9c27c1ba/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:19:27,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f249061-bdb8-459b-9b76-d8aa9c27c1ba/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-22 00:19:27,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:19:27,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-22 00:19:27,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:19:27,651 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 00:19:27,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:19:27,720 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-22 00:19:27,720 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:19:27,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944637112] [2022-11-22 00:19:27,720 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 00:19:27,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307573993] [2022-11-22 00:19:27,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307573993] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-22 00:19:27,721 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 00:19:27,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2022-11-22 00:19:27,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492362237] [2022-11-22 00:19:27,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:19:27,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 00:19:27,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:19:27,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 00:19:27,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-22 00:19:27,723 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) [2022-11-22 00:19:27,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:19:27,801 INFO L93 Difference]: Finished difference Result 72 states and 90 transitions. [2022-11-22 00:19:27,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 00:19:27,802 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 [2022-11-22 00:19:27,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:19:27,805 INFO L225 Difference]: With dead ends: 72 [2022-11-22 00:19:27,805 INFO L226 Difference]: Without dead ends: 70 [2022-11-22 00:19:27,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-22 00:19:27,807 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, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:19:27,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 38 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:19:27,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-11-22 00:19:27,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2022-11-22 00:19:27,827 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) [2022-11-22 00:19:27,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 86 transitions. [2022-11-22 00:19:27,831 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 86 transitions. Word has length 25 [2022-11-22 00:19:27,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:19:27,832 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 86 transitions. [2022-11-22 00:19:27,832 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) [2022-11-22 00:19:27,832 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 86 transitions. [2022-11-22 00:19:27,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-22 00:19:27,834 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:19:27,834 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:19:27,841 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f249061-bdb8-459b-9b76-d8aa9c27c1ba/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-22 00:19:28,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f249061-bdb8-459b-9b76-d8aa9c27c1ba/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-22 00:19:28,042 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:19:28,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:19:28,042 INFO L85 PathProgramCache]: Analyzing trace with hash 2092232782, now seen corresponding path program 2 times [2022-11-22 00:19:28,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:19:28,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758852235] [2022-11-22 00:19:28,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:19:28,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:19:28,063 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 00:19:28,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1106139937] [2022-11-22 00:19:28,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 00:19:28,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:19:28,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f249061-bdb8-459b-9b76-d8aa9c27c1ba/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:19:28,069 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f249061-bdb8-459b-9b76-d8aa9c27c1ba/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:19:28,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f249061-bdb8-459b-9b76-d8aa9c27c1ba/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-22 00:19:28,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-22 00:19:28,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 00:19:28,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-22 00:19:28,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:19:28,277 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-22 00:19:28,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:19:28,454 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-22 00:19:28,455 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:19:28,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758852235] [2022-11-22 00:19:28,455 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 00:19:28,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106139937] [2022-11-22 00:19:28,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106139937] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:19:28,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [599471182] [2022-11-22 00:19:28,459 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-22 00:19:28,459 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:19:28,460 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:19:28,460 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:19:28,460 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:19:29,483 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 13 for LOIs [2022-11-22 00:19:29,488 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:19:29,859 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1360#(and (<= ~counter~0 51) (= |__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 [2022-11-22 00:19:29,860 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:19:29,860 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 00:19:29,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2022-11-22 00:19:29,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162667556] [2022-11-22 00:19:29,860 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 00:19:29,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-22 00:19:29,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:19:29,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-22 00:19:29,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2022-11-22 00:19:29,862 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) [2022-11-22 00:19:30,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:19:30,105 INFO L93 Difference]: Finished difference Result 81 states and 97 transitions. [2022-11-22 00:19:30,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-22 00:19:30,106 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 [2022-11-22 00:19:30,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:19:30,108 INFO L225 Difference]: With dead ends: 81 [2022-11-22 00:19:30,108 INFO L226 Difference]: Without dead ends: 76 [2022-11-22 00:19:30,109 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2022-11-22 00:19:30,110 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 26 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-11-22 00:19:30,110 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] [2022-11-22 00:19:30,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-11-22 00:19:30,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2022-11-22 00:19:30,125 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) [2022-11-22 00:19:30,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 85 transitions. [2022-11-22 00:19:30,126 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 85 transitions. Word has length 30 [2022-11-22 00:19:30,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:19:30,126 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 85 transitions. [2022-11-22 00:19:30,126 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) [2022-11-22 00:19:30,127 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 85 transitions. [2022-11-22 00:19:30,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-22 00:19:30,128 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:19:30,128 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1] [2022-11-22 00:19:30,138 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f249061-bdb8-459b-9b76-d8aa9c27c1ba/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-22 00:19:30,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f249061-bdb8-459b-9b76-d8aa9c27c1ba/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:19:30,333 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:19:30,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:19:30,334 INFO L85 PathProgramCache]: Analyzing trace with hash 1503837811, now seen corresponding path program 3 times [2022-11-22 00:19:30,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:19:30,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016880041] [2022-11-22 00:19:30,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:19:30,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:19:30,351 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 00:19:30,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [972998230] [2022-11-22 00:19:30,351 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 00:19:30,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:19:30,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f249061-bdb8-459b-9b76-d8aa9c27c1ba/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:19:30,365 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f249061-bdb8-459b-9b76-d8aa9c27c1ba/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:19:30,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f249061-bdb8-459b-9b76-d8aa9c27c1ba/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-22 00:19:30,441 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 00:19:30,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 00:19:30,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-22 00:19:30,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:19:32,600 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 58 proven. 16 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-11-22 00:19:32,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:19:39,135 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 56 proven. 8 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-11-22 00:19:39,135 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:19:39,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016880041] [2022-11-22 00:19:39,135 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 00:19:39,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972998230] [2022-11-22 00:19:39,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972998230] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:19:39,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1619048251] [2022-11-22 00:19:39,138 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-22 00:19:39,138 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:19:39,139 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:19:39,139 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:19:39,139 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:19:40,110 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 13 for LOIs [2022-11-22 00:19:40,139 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:19:42,036 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1925#(and (<= ~counter~0 51) (= |__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 [2022-11-22 00:19:42,036 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:19:42,036 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 00:19:42,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2022-11-22 00:19:42,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794062226] [2022-11-22 00:19:42,037 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 00:19:42,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-22 00:19:42,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:19:42,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-22 00:19:42,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=413, Unknown=2, NotChecked=0, Total=506 [2022-11-22 00:19:42,038 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, (12), 7 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-22 00:19:47,980 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-22 00:19:49,819 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-22 00:19:51,401 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-22 00:19:53,402 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-22 00:19:54,833 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-22 00:19:58,260 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-22 00:20:00,156 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-22 00:20:02,188 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-22 00:20:03,993 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-22 00:20:07,258 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-22 00:20:08,281 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-22 00:20:10,283 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 [] [2022-11-22 00:20:13,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:20:13,488 INFO L93 Difference]: Finished difference Result 83 states and 91 transitions. [2022-11-22 00:20:13,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-22 00:20:13,489 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, (12), 7 states have call predecessors, (12), 5 states have call successors, (12) Word has length 53 [2022-11-22 00:20:13,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:20:13,490 INFO L225 Difference]: With dead ends: 83 [2022-11-22 00:20:13,490 INFO L226 Difference]: Without dead ends: 0 [2022-11-22 00:20:13,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 134 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=116, Invalid=532, Unknown=2, NotChecked=0, Total=650 [2022-11-22 00:20:13,491 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 24 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 25 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.5s IncrementalHoareTripleChecker+Time [2022-11-22 00:20:13,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 28 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 88 Invalid, 4 Unknown, 0 Unchecked, 27.5s Time] [2022-11-22 00:20:13,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-22 00:20:13,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-22 00:20:13,492 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) [2022-11-22 00:20:13,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-22 00:20:13,492 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 53 [2022-11-22 00:20:13,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:20:13,493 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-22 00:20:13,493 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, (12), 7 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-22 00:20:13,493 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-22 00:20:13,493 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-22 00:20:13,495 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-22 00:20:13,504 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f249061-bdb8-459b-9b76-d8aa9c27c1ba/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-22 00:20:13,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f249061-bdb8-459b-9b76-d8aa9c27c1ba/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:20:13,705 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-11-22 00:20:22,862 WARN L233 SmtUtils]: Spent 5.99s on a formula simplification. DAG size of input: 77 DAG size of output: 17 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-11-22 00:20:26,271 INFO L899 garLoopResultBuilder]: For program point L33(lines 30 42) no Hoare annotation was computed. [2022-11-22 00:20:26,271 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-11-22 00:20:26,271 INFO L895 garLoopResultBuilder]: At program point L31(line 31) the Hoare annotation is: (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 (* 2 |ULTIMATE.start_main_~a~0#1|))) (= (let ((.cse0 (div (+ (- |ULTIMATE.start_main_~t~0#1|) 1) (- 2)))) (+ (* .cse0 .cse0) (* .cse0 2) 1)) |ULTIMATE.start_main_~s~0#1|)) [2022-11-22 00:20:26,272 INFO L895 garLoopResultBuilder]: At program point L31-1(line 31) the Hoare annotation is: (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 (* 2 |ULTIMATE.start_main_~a~0#1|))) (= (let ((.cse0 (div (+ (- |ULTIMATE.start_main_~t~0#1|) 1) (- 2)))) (+ (* .cse0 .cse0) (* .cse0 2) 1)) |ULTIMATE.start_main_~s~0#1|)) [2022-11-22 00:20:26,272 INFO L902 garLoopResultBuilder]: At program point L46(line 46) the Hoare annotation is: true [2022-11-22 00:20:26,272 INFO L895 garLoopResultBuilder]: At program point L44(line 44) the Hoare annotation is: (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 (* 2 |ULTIMATE.start_main_~a~0#1|))) (= (let ((.cse0 (div (+ (- |ULTIMATE.start_main_~t~0#1|) 1) (- 2)))) (+ (* .cse0 .cse0) (* .cse0 2) 1)) |ULTIMATE.start_main_~s~0#1|)) [2022-11-22 00:20:26,272 INFO L895 garLoopResultBuilder]: At program point L32(line 32) the Hoare annotation is: (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 (* 2 |ULTIMATE.start_main_~a~0#1|))) (= (let ((.cse0 (div (+ (- |ULTIMATE.start_main_~t~0#1|) 1) (- 2)))) (+ (* .cse0 .cse0) (* .cse0 2) 1)) |ULTIMATE.start_main_~s~0#1|)) [2022-11-22 00:20:26,272 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2022-11-22 00:20:26,272 INFO L899 garLoopResultBuilder]: For program point L30-1(lines 30 42) no Hoare annotation was computed. [2022-11-22 00:20:26,272 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|))) [2022-11-22 00:20:26,273 INFO L895 garLoopResultBuilder]: At program point L30-4(lines 30 42) the Hoare annotation is: (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 (* 2 |ULTIMATE.start_main_~a~0#1|))) (= (let ((.cse0 (div (+ (- |ULTIMATE.start_main_~t~0#1|) 1) (- 2)))) (+ (* .cse0 .cse0) (* .cse0 2) 1)) |ULTIMATE.start_main_~s~0#1|)) [2022-11-22 00:20:26,273 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|))) [2022-11-22 00:20:26,273 INFO L902 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 11 17) the Hoare annotation is: true [2022-11-22 00:20:26,273 INFO L899 garLoopResultBuilder]: For program point L13(lines 13 14) no Hoare annotation was computed. [2022-11-22 00:20:26,273 INFO L899 garLoopResultBuilder]: For program point L12(lines 12 15) no Hoare annotation was computed. [2022-11-22 00:20:26,273 INFO L899 garLoopResultBuilder]: For program point L12-2(lines 11 17) no Hoare annotation was computed. [2022-11-22 00:20:26,273 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 11 17) no Hoare annotation was computed. [2022-11-22 00:20:26,273 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2022-11-22 00:20:26,277 INFO L444 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1] [2022-11-22 00:20:26,279 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-22 00:20:26,292 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 12:20:26 BoogieIcfgContainer [2022-11-22 00:20:26,293 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-22 00:20:26,293 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-22 00:20:26,293 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-22 00:20:26,294 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-22 00:20:26,294 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:19:22" (3/4) ... [2022-11-22 00:20:26,297 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-11-22 00:20:26,304 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2022-11-22 00:20:26,307 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2022-11-22 00:20:26,308 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2022-11-22 00:20:26,308 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2022-11-22 00:20:26,308 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-11-22 00:20:26,341 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f249061-bdb8-459b-9b76-d8aa9c27c1ba/bin/utaipan-g80aRyZoba/witness.graphml [2022-11-22 00:20:26,342 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-22 00:20:26,342 INFO L158 Benchmark]: Toolchain (without parser) took 64896.62ms. Allocated memory was 178.3MB in the beginning and 213.9MB in the end (delta: 35.7MB). Free memory was 146.7MB in the beginning and 95.6MB in the end (delta: 51.1MB). Peak memory consumption was 88.5MB. Max. memory is 16.1GB. [2022-11-22 00:20:26,343 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 130.0MB. Free memory is still 84.8MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-22 00:20:26,343 INFO L158 Benchmark]: CACSL2BoogieTranslator took 271.60ms. Allocated memory is still 178.3MB. Free memory was 146.7MB in the beginning and 135.9MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-22 00:20:26,343 INFO L158 Benchmark]: Boogie Procedure Inliner took 35.27ms. Allocated memory is still 178.3MB. Free memory was 135.9MB in the beginning and 134.4MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-22 00:20:26,344 INFO L158 Benchmark]: Boogie Preprocessor took 29.02ms. Allocated memory is still 178.3MB. Free memory was 134.4MB in the beginning and 133.5MB in the end (delta: 926.8kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-22 00:20:26,344 INFO L158 Benchmark]: RCFGBuilder took 351.75ms. Allocated memory is still 178.3MB. Free memory was 133.5MB in the beginning and 122.4MB in the end (delta: 11.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-22 00:20:26,345 INFO L158 Benchmark]: TraceAbstraction took 64151.41ms. Allocated memory was 178.3MB in the beginning and 213.9MB in the end (delta: 35.7MB). Free memory was 121.9MB in the beginning and 98.7MB in the end (delta: 23.1MB). Peak memory consumption was 59.1MB. Max. memory is 16.1GB. [2022-11-22 00:20:26,345 INFO L158 Benchmark]: Witness Printer took 48.58ms. Allocated memory is still 213.9MB. Free memory was 98.7MB in the beginning and 95.6MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-22 00:20:26,347 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 130.0MB. Free memory is still 84.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 271.60ms. Allocated memory is still 178.3MB. Free memory was 146.7MB in the beginning and 135.9MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 35.27ms. Allocated memory is still 178.3MB. Free memory was 135.9MB in the beginning and 134.4MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 29.02ms. Allocated memory is still 178.3MB. Free memory was 134.4MB in the beginning and 133.5MB in the end (delta: 926.8kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 351.75ms. Allocated memory is still 178.3MB. Free memory was 133.5MB in the beginning and 122.4MB in the end (delta: 11.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 64151.41ms. Allocated memory was 178.3MB in the beginning and 213.9MB in the end (delta: 35.7MB). Free memory was 121.9MB in the beginning and 98.7MB in the end (delta: 23.1MB). Peak memory consumption was 59.1MB. Max. memory is 16.1GB. * Witness Printer took 48.58ms. Allocated memory is still 213.9MB. Free memory was 98.7MB in the beginning and 95.6MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. 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: 64.0s, OverallIterations: 8, TraceHistogramMax: 9, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 32.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 12.6s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 4 mSolverCounterUnknown, 136 SdHoareTripleChecker+Valid, 28.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 116 mSDsluCounter, 424 SdHoareTripleChecker+Invalid, 27.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 271 mSDsCounter, 91 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 522 IncrementalHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 91 mSolverCounterUnsat, 153 mSDtfsCounter, 522 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 420 GetRequests, 317 SyntacticMatches, 9 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 15.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=75occurred in iteration=7, InterpolantAutomatonStates: 53, 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, 44 PreInvPairs, 74 NumberOfFragments, 203 HoareAnnotationTreeSize, 44 FomulaSimplifications, 138 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 2012 FormulaSimplificationTreeSizeReductionInter, 12.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 10.1s InterpolantComputationTime, 165 NumberOfCodeBlocks, 151 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 297 ConstructedInterpolants, 0 QuantifiedInterpolants, 1298 SizeOfPredicates, 14 NumberOfNonLiveVariables, 422 ConjunctsInSsa, 90 ConjunctsInUnsatCore, 13 InterpolantComputations, 4 PerfectInterpolantSequences, 407/446 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: 0.0s, 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: 0.1s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 0, DOMAIN_WIDEN_TIME: 0.0s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 0, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 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! [2022-11-22 00:20:26,370 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f249061-bdb8-459b-9b76-d8aa9c27c1ba/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE