./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a 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_d55f7e60-0828-4eaf-9ff7-88c8f3b9e13e/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55f7e60-0828-4eaf-9ff7-88c8f3b9e13e/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55f7e60-0828-4eaf-9ff7-88c8f3b9e13e/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55f7e60-0828-4eaf-9ff7-88c8f3b9e13e/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55f7e60-0828-4eaf-9ff7-88c8f3b9e13e/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55f7e60-0828-4eaf-9ff7-88c8f3b9e13e/bin/utaipan-ByfvJB40ur --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 7f0424dbafec10d34a77570c428224cb0ba56b8b9f5906b463f2dcbc550354ee --- 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-38b53e6 [2022-11-26 00:58:12,692 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 00:58:12,694 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 00:58:12,738 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 00:58:12,738 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 00:58:12,742 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 00:58:12,745 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 00:58:12,750 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 00:58:12,752 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 00:58:12,758 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 00:58:12,759 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 00:58:12,760 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 00:58:12,760 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 00:58:12,761 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 00:58:12,762 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 00:58:12,763 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 00:58:12,764 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 00:58:12,765 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 00:58:12,770 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 00:58:12,777 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 00:58:12,779 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 00:58:12,782 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 00:58:12,784 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 00:58:12,785 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 00:58:12,796 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 00:58:12,796 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 00:58:12,797 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 00:58:12,799 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 00:58:12,799 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 00:58:12,800 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 00:58:12,801 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 00:58:12,802 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 00:58:12,804 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 00:58:12,805 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 00:58:12,806 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 00:58:12,806 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 00:58:12,807 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 00:58:12,809 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 00:58:12,809 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 00:58:12,811 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 00:58:12,812 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 00:58:12,813 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55f7e60-0828-4eaf-9ff7-88c8f3b9e13e/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-26 00:58:12,854 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 00:58:12,854 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 00:58:12,855 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 00:58:12,855 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 00:58:12,856 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 00:58:12,857 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 00:58:12,857 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 00:58:12,857 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 00:58:12,857 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 00:58:12,857 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 00:58:12,858 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 00:58:12,859 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 00:58:12,859 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 00:58:12,859 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 00:58:12,859 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 00:58:12,860 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 00:58:12,860 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 00:58:12,860 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 00:58:12,861 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 00:58:12,861 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 00:58:12,861 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 00:58:12,861 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 00:58:12,862 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 00:58:12,862 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-26 00:58:12,862 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 00:58:12,862 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-26 00:58:12,863 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 00:58:12,863 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-26 00:58:12,863 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 00:58:12,863 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-26 00:58:12,864 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 00:58:12,864 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 00:58:12,864 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:58:12,865 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 00:58:12,865 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 00:58:12,865 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 00:58:12,865 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-26 00:58:12,865 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 00:58:12,866 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 00:58:12,866 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-26 00:58:12,866 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 00:58:12,866 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_d55f7e60-0828-4eaf-9ff7-88c8f3b9e13e/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55f7e60-0828-4eaf-9ff7-88c8f3b9e13e/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7f0424dbafec10d34a77570c428224cb0ba56b8b9f5906b463f2dcbc550354ee [2022-11-26 00:58:13,180 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 00:58:13,214 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 00:58:13,230 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 00:58:13,232 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 00:58:13,232 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 00:58:13,233 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55f7e60-0828-4eaf-9ff7-88c8f3b9e13e/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound2.c [2022-11-26 00:58:16,307 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 00:58:16,493 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 00:58:16,494 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55f7e60-0828-4eaf-9ff7-88c8f3b9e13e/sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound2.c [2022-11-26 00:58:16,504 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55f7e60-0828-4eaf-9ff7-88c8f3b9e13e/bin/utaipan-ByfvJB40ur/data/73378543b/457b780083c240f4a2b9e35b903c2b1c/FLAG868dfab55 [2022-11-26 00:58:16,523 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55f7e60-0828-4eaf-9ff7-88c8f3b9e13e/bin/utaipan-ByfvJB40ur/data/73378543b/457b780083c240f4a2b9e35b903c2b1c [2022-11-26 00:58:16,526 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 00:58:16,529 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 00:58:16,533 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 00:58:16,534 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 00:58:16,538 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 00:58:16,539 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:58:16" (1/1) ... [2022-11-26 00:58:16,540 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1cb9f8fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:58:16, skipping insertion in model container [2022-11-26 00:58:16,541 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:58:16" (1/1) ... [2022-11-26 00:58:16,549 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 00:58:16,570 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:58:16,766 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_d55f7e60-0828-4eaf-9ff7-88c8f3b9e13e/sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound2.c[524,537] [2022-11-26 00:58:16,810 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:58:16,823 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 00:58:16,842 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_d55f7e60-0828-4eaf-9ff7-88c8f3b9e13e/sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound2.c[524,537] [2022-11-26 00:58:16,869 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:58:16,883 INFO L208 MainTranslator]: Completed translation [2022-11-26 00:58:16,884 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:58:16 WrapperNode [2022-11-26 00:58:16,884 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 00:58:16,886 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 00:58:16,886 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 00:58:16,886 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 00:58:16,894 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:58:16" (1/1) ... [2022-11-26 00:58:16,917 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:58:16" (1/1) ... [2022-11-26 00:58:16,948 INFO L138 Inliner]: procedures = 14, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 59 [2022-11-26 00:58:16,949 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 00:58:16,950 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 00:58:16,950 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 00:58:16,950 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 00:58:16,961 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:58:16" (1/1) ... [2022-11-26 00:58:16,962 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:58:16" (1/1) ... [2022-11-26 00:58:16,967 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:58:16" (1/1) ... [2022-11-26 00:58:16,967 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:58:16" (1/1) ... [2022-11-26 00:58:16,980 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:58:16" (1/1) ... [2022-11-26 00:58:16,988 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:58:16" (1/1) ... [2022-11-26 00:58:16,991 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:58:16" (1/1) ... [2022-11-26 00:58:16,996 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:58:16" (1/1) ... [2022-11-26 00:58:16,998 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 00:58:17,001 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 00:58:17,005 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 00:58:17,005 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 00:58:17,006 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:58:16" (1/1) ... [2022-11-26 00:58:17,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:58:17,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55f7e60-0828-4eaf-9ff7-88c8f3b9e13e/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:58:17,062 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55f7e60-0828-4eaf-9ff7-88c8f3b9e13e/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 00:58:17,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55f7e60-0828-4eaf-9ff7-88c8f3b9e13e/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 00:58:17,118 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 00:58:17,118 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-26 00:58:17,118 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 00:58:17,118 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 00:58:17,118 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-26 00:58:17,119 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-26 00:58:17,216 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 00:58:17,218 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 00:58:17,437 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 00:58:17,562 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 00:58:17,562 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-26 00:58:17,565 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:58:17 BoogieIcfgContainer [2022-11-26 00:58:17,566 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 00:58:17,568 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 00:58:17,568 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 00:58:17,572 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 00:58:17,572 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:58:16" (1/3) ... [2022-11-26 00:58:17,573 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a0f2afc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:58:17, skipping insertion in model container [2022-11-26 00:58:17,573 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:58:16" (2/3) ... [2022-11-26 00:58:17,574 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a0f2afc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:58:17, skipping insertion in model container [2022-11-26 00:58:17,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:58:17" (3/3) ... [2022-11-26 00:58:17,576 INFO L112 eAbstractionObserver]: Analyzing ICFG prod4br-ll_unwindbound2.c [2022-11-26 00:58:17,598 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 00:58:17,598 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-26 00:58:17,658 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 00:58:17,664 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;@2c578a8e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 00:58:17,664 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-26 00:58:17,669 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-26 00:58:17,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-26 00:58:17,677 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:58:17,677 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-26 00:58:17,678 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:58:17,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:58:17,685 INFO L85 PathProgramCache]: Analyzing trace with hash -1275866824, now seen corresponding path program 1 times [2022-11-26 00:58:17,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:58:17,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77312643] [2022-11-26 00:58:17,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:58:17,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:58:17,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:58:17,848 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:58:17,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77312643] [2022-11-26 00:58:17,849 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-26 00:58:17,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278223673] [2022-11-26 00:58:17,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:58:17,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:58:17,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55f7e60-0828-4eaf-9ff7-88c8f3b9e13e/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:58:17,854 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55f7e60-0828-4eaf-9ff7-88c8f3b9e13e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:58:17,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55f7e60-0828-4eaf-9ff7-88c8f3b9e13e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-26 00:58:17,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:58:17,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-26 00:58:17,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:58:18,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:58:18,021 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:58:18,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278223673] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:58:18,022 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:58:18,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:58:18,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99711030] [2022-11-26 00:58:18,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:58:18,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-26 00:58:18,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:58:18,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-26 00:58:18,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-26 00:58:18,117 INFO L87 Difference]: Start difference. First operand has 15 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) 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) [2022-11-26 00:58:18,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:58:18,151 INFO L93 Difference]: Finished difference Result 29 states and 42 transitions. [2022-11-26 00:58:18,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-26 00:58:18,154 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 [2022-11-26 00:58:18,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:58:18,162 INFO L225 Difference]: With dead ends: 29 [2022-11-26 00:58:18,163 INFO L226 Difference]: Without dead ends: 13 [2022-11-26 00:58:18,166 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-26 00:58:18,173 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:58:18,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 15 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:58:18,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-11-26 00:58:18,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-11-26 00:58:18,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.375) internal successors, (11), 9 states have internal predecessors, (11), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-26 00:58:18,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2022-11-26 00:58:18,219 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 6 [2022-11-26 00:58:18,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:58:18,221 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2022-11-26 00:58:18,221 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) [2022-11-26 00:58:18,221 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2022-11-26 00:58:18,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-26 00:58:18,223 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:58:18,223 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:58:18,230 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55f7e60-0828-4eaf-9ff7-88c8f3b9e13e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-26 00:58:18,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55f7e60-0828-4eaf-9ff7-88c8f3b9e13e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-26 00:58:18,429 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:58:18,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:58:18,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1770432352, now seen corresponding path program 1 times [2022-11-26 00:58:18,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:58:18,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064562147] [2022-11-26 00:58:18,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:58:18,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:58:18,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:58:18,456 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:58:18,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064562147] [2022-11-26 00:58:18,457 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-26 00:58:18,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110920983] [2022-11-26 00:58:18,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:58:18,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:58:18,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55f7e60-0828-4eaf-9ff7-88c8f3b9e13e/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:58:18,459 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55f7e60-0828-4eaf-9ff7-88c8f3b9e13e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:58:18,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55f7e60-0828-4eaf-9ff7-88c8f3b9e13e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-26 00:58:18,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:58:18,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 00:58:18,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:58:18,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:58:18,578 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:58:18,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110920983] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:58:18,584 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:58:18,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:58:18,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96864646] [2022-11-26 00:58:18,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:58:18,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:58:18,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:58:18,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:58:18,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:58:18,595 INFO L87 Difference]: Start difference. First operand 13 states and 16 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) [2022-11-26 00:58:18,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:58:18,627 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2022-11-26 00:58:18,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:58:18,628 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 [2022-11-26 00:58:18,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:58:18,629 INFO L225 Difference]: With dead ends: 23 [2022-11-26 00:58:18,629 INFO L226 Difference]: Without dead ends: 15 [2022-11-26 00:58:18,629 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:58:18,631 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:58:18,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 35 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:58:18,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-11-26 00:58:18,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-11-26 00:58:18,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-26 00:58:18,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2022-11-26 00:58:18,641 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 7 [2022-11-26 00:58:18,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:58:18,643 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2022-11-26 00:58:18,644 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) [2022-11-26 00:58:18,644 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2022-11-26 00:58:18,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-26 00:58:18,644 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:58:18,644 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:58:18,659 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55f7e60-0828-4eaf-9ff7-88c8f3b9e13e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-26 00:58:18,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55f7e60-0828-4eaf-9ff7-88c8f3b9e13e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:58:18,845 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:58:18,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:58:18,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1768644892, now seen corresponding path program 1 times [2022-11-26 00:58:18,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:58:18,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379813189] [2022-11-26 00:58:18,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:58:18,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:58:18,863 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:58:18,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [751115102] [2022-11-26 00:58:18,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:58:18,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:58:18,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55f7e60-0828-4eaf-9ff7-88c8f3b9e13e/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:58:18,865 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55f7e60-0828-4eaf-9ff7-88c8f3b9e13e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:58:18,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55f7e60-0828-4eaf-9ff7-88c8f3b9e13e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-26 00:58:18,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:58:18,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-26 00:58:18,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:58:18,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:58:18,996 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:58:18,997 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:58:18,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379813189] [2022-11-26 00:58:18,997 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:58:18,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751115102] [2022-11-26 00:58:18,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751115102] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:58:18,998 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:58:18,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:58:18,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280203521] [2022-11-26 00:58:18,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:58:18,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:58:18,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:58:19,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:58:19,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:58:19,000 INFO L87 Difference]: Start difference. First operand 15 states and 18 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) [2022-11-26 00:58:19,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:58:19,061 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2022-11-26 00:58:19,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:58:19,062 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 [2022-11-26 00:58:19,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:58:19,062 INFO L225 Difference]: With dead ends: 25 [2022-11-26 00:58:19,063 INFO L226 Difference]: Without dead ends: 23 [2022-11-26 00:58:19,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:58:19,065 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 6 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:58:19,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 38 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:58:19,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-26 00:58:19,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2022-11-26 00:58:19,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 15 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-26 00:58:19,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2022-11-26 00:58:19,074 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 7 [2022-11-26 00:58:19,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:58:19,074 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2022-11-26 00:58:19,074 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) [2022-11-26 00:58:19,075 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2022-11-26 00:58:19,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-26 00:58:19,075 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:58:19,076 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:58:19,088 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55f7e60-0828-4eaf-9ff7-88c8f3b9e13e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-26 00:58:19,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55f7e60-0828-4eaf-9ff7-88c8f3b9e13e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-11-26 00:58:19,282 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:58:19,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:58:19,283 INFO L85 PathProgramCache]: Analyzing trace with hash 167458353, now seen corresponding path program 1 times [2022-11-26 00:58:19,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:58:19,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052743710] [2022-11-26 00:58:19,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:58:19,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:58:19,305 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:58:19,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [885858304] [2022-11-26 00:58:19,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:58:19,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:58:19,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55f7e60-0828-4eaf-9ff7-88c8f3b9e13e/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:58:19,313 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55f7e60-0828-4eaf-9ff7-88c8f3b9e13e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:58:19,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55f7e60-0828-4eaf-9ff7-88c8f3b9e13e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-26 00:58:19,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:58:19,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-26 00:58:19,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:58:19,675 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:58:19,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:58:19,961 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:58:19,961 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:58:19,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052743710] [2022-11-26 00:58:19,962 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:58:19,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885858304] [2022-11-26 00:58:19,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885858304] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:58:19,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [827353751] [2022-11-26 00:58:19,985 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-26 00:58:19,985 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:58:19,989 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:58:19,996 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:58:19,997 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:58:20,350 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2022-11-26 00:58:20,370 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:58:21,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [827353751] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:58:21,328 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:58:21,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9, 7] total 19 [2022-11-26 00:58:21,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736921562] [2022-11-26 00:58:21,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:58:21,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-26 00:58:21,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:58:21,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-26 00:58:21,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2022-11-26 00:58:21,332 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 2 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) [2022-11-26 00:58:21,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:58:21,486 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2022-11-26 00:58:21,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-26 00:58:21,488 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 2 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 13 [2022-11-26 00:58:21,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:58:21,490 INFO L225 Difference]: With dead ends: 29 [2022-11-26 00:58:21,490 INFO L226 Difference]: Without dead ends: 21 [2022-11-26 00:58:21,492 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2022-11-26 00:58:21,498 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:58:21,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 40 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:58:21,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-26 00:58:21,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-11-26 00:58:21,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-26 00:58:21,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2022-11-26 00:58:21,516 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 13 [2022-11-26 00:58:21,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:58:21,516 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2022-11-26 00:58:21,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 2 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) [2022-11-26 00:58:21,525 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2022-11-26 00:58:21,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-26 00:58:21,526 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:58:21,527 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:58:21,540 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55f7e60-0828-4eaf-9ff7-88c8f3b9e13e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-26 00:58:21,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55f7e60-0828-4eaf-9ff7-88c8f3b9e13e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:58:21,733 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:58:21,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:58:21,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1288276564, now seen corresponding path program 1 times [2022-11-26 00:58:21,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:58:21,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223114183] [2022-11-26 00:58:21,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:58:21,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:58:21,748 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:58:21,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [919774844] [2022-11-26 00:58:21,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:58:21,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:58:21,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55f7e60-0828-4eaf-9ff7-88c8f3b9e13e/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:58:21,757 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55f7e60-0828-4eaf-9ff7-88c8f3b9e13e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:58:21,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55f7e60-0828-4eaf-9ff7-88c8f3b9e13e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-26 00:58:21,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:58:21,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-26 00:58:21,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:58:21,853 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:58:21,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:58:21,888 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:58:21,889 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:58:21,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223114183] [2022-11-26 00:58:21,889 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:58:21,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919774844] [2022-11-26 00:58:21,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919774844] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:58:21,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [340841503] [2022-11-26 00:58:21,893 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-26 00:58:21,893 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:58:21,893 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:58:21,894 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:58:21,894 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:58:22,961 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 63 for LOIs [2022-11-26 00:58:23,108 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:58:24,159 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '506#(and (<= 0 |#NULL.base|) (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (<= |#NULL.base| 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|))' at error location [2022-11-26 00:58:24,159 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:58:24,159 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:58:24,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 5 [2022-11-26 00:58:24,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108628590] [2022-11-26 00:58:24,160 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 00:58:24,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:58:24,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:58:24,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:58:24,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-11-26 00:58:24,161 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-26 00:58:24,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:58:24,209 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2022-11-26 00:58:24,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 00:58:24,210 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 15 [2022-11-26 00:58:24,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:58:24,211 INFO L225 Difference]: With dead ends: 31 [2022-11-26 00:58:24,211 INFO L226 Difference]: Without dead ends: 23 [2022-11-26 00:58:24,211 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-11-26 00:58:24,212 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:58:24,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:58:24,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-26 00:58:24,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-11-26 00:58:24,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-26 00:58:24,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2022-11-26 00:58:24,219 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 15 [2022-11-26 00:58:24,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:58:24,220 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2022-11-26 00:58:24,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-26 00:58:24,220 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2022-11-26 00:58:24,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-26 00:58:24,221 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:58:24,221 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:58:24,231 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55f7e60-0828-4eaf-9ff7-88c8f3b9e13e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-26 00:58:24,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55f7e60-0828-4eaf-9ff7-88c8f3b9e13e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:58:24,427 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:58:24,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:58:24,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1286489104, now seen corresponding path program 1 times [2022-11-26 00:58:24,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:58:24,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314763481] [2022-11-26 00:58:24,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:58:24,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:58:24,449 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:58:24,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2020098680] [2022-11-26 00:58:24,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:58:24,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:58:24,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55f7e60-0828-4eaf-9ff7-88c8f3b9e13e/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:58:24,462 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55f7e60-0828-4eaf-9ff7-88c8f3b9e13e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:58:24,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55f7e60-0828-4eaf-9ff7-88c8f3b9e13e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-26 00:58:24,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:58:24,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-26 00:58:24,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:58:25,456 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:58:25,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:58:27,010 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:58:27,011 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:58:27,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314763481] [2022-11-26 00:58:27,011 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:58:27,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020098680] [2022-11-26 00:58:27,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020098680] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:58:27,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1655472474] [2022-11-26 00:58:27,014 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-26 00:58:27,014 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:58:27,015 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:58:27,015 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:58:27,015 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:58:27,695 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 36 for LOIs [2022-11-26 00:58:27,783 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:58:28,576 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '688#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (< ~counter~0 3) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:58:28,577 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:58:28,577 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:58:28,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2022-11-26 00:58:28,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066591944] [2022-11-26 00:58:28,578 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 00:58:28,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-26 00:58:28,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:58:28,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-26 00:58:28,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-11-26 00:58:28,580 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-26 00:58:29,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:58:29,084 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2022-11-26 00:58:29,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-26 00:58:29,085 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15 [2022-11-26 00:58:29,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:58:29,086 INFO L225 Difference]: With dead ends: 33 [2022-11-26 00:58:29,086 INFO L226 Difference]: Without dead ends: 31 [2022-11-26 00:58:29,087 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2022-11-26 00:58:29,087 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 19 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:58:29,087 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 45 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-26 00:58:29,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-26 00:58:29,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2022-11-26 00:58:29,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-26 00:58:29,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2022-11-26 00:58:29,101 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 15 [2022-11-26 00:58:29,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:58:29,102 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2022-11-26 00:58:29,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-26 00:58:29,102 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2022-11-26 00:58:29,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-26 00:58:29,103 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:58:29,103 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-26 00:58:29,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55f7e60-0828-4eaf-9ff7-88c8f3b9e13e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-26 00:58:29,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55f7e60-0828-4eaf-9ff7-88c8f3b9e13e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:58:29,317 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:58:29,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:58:29,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1954110013, now seen corresponding path program 1 times [2022-11-26 00:58:29,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:58:29,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461797873] [2022-11-26 00:58:29,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:58:29,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:58:29,346 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:58:29,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [193929108] [2022-11-26 00:58:29,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:58:29,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:58:29,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55f7e60-0828-4eaf-9ff7-88c8f3b9e13e/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:58:29,353 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55f7e60-0828-4eaf-9ff7-88c8f3b9e13e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:58:29,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55f7e60-0828-4eaf-9ff7-88c8f3b9e13e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-26 00:58:29,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:58:29,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-26 00:58:29,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:58:29,526 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-26 00:58:29,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:58:29,688 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-26 00:58:29,689 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:58:29,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461797873] [2022-11-26 00:58:29,689 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:58:29,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193929108] [2022-11-26 00:58:29,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193929108] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:58:29,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1928149095] [2022-11-26 00:58:29,692 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-26 00:58:29,693 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:58:29,693 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:58:29,693 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:58:29,694 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:58:30,445 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 61 for LOIs [2022-11-26 00:58:30,554 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:58:31,418 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '916#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (< ~counter~0 3) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:58:31,418 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:58:31,418 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:58:31,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2022-11-26 00:58:31,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453140700] [2022-11-26 00:58:31,419 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 00:58:31,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-26 00:58:31,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:58:31,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-26 00:58:31,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2022-11-26 00:58:31,420 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-26 00:58:31,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:58:31,732 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2022-11-26 00:58:31,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-26 00:58:31,733 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), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 21 [2022-11-26 00:58:31,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:58:31,736 INFO L225 Difference]: With dead ends: 34 [2022-11-26 00:58:31,736 INFO L226 Difference]: Without dead ends: 32 [2022-11-26 00:58:31,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2022-11-26 00:58:31,737 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 17 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:58:31,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 56 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:58:31,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-26 00:58:31,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-11-26 00:58:31,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 24 states have internal predecessors, (25), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-26 00:58:31,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2022-11-26 00:58:31,764 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 21 [2022-11-26 00:58:31,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:58:31,765 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2022-11-26 00:58:31,767 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), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-26 00:58:31,767 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2022-11-26 00:58:31,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-26 00:58:31,769 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:58:31,770 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-11-26 00:58:31,781 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55f7e60-0828-4eaf-9ff7-88c8f3b9e13e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-26 00:58:31,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55f7e60-0828-4eaf-9ff7-88c8f3b9e13e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-26 00:58:31,975 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:58:31,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:58:31,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1992017592, now seen corresponding path program 2 times [2022-11-26 00:58:31,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:58:31,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303013105] [2022-11-26 00:58:31,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:58:31,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:58:31,990 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:58:31,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1243203542] [2022-11-26 00:58:31,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:58:31,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:58:31,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55f7e60-0828-4eaf-9ff7-88c8f3b9e13e/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:58:31,992 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55f7e60-0828-4eaf-9ff7-88c8f3b9e13e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:58:32,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55f7e60-0828-4eaf-9ff7-88c8f3b9e13e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-26 00:58:32,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-26 00:58:32,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2022-11-26 00:58:32,118 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-26 00:58:32,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-26 00:58:32,178 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-26 00:58:32,178 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-26 00:58:32,180 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-26 00:58:32,197 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55f7e60-0828-4eaf-9ff7-88c8f3b9e13e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-26 00:58:32,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55f7e60-0828-4eaf-9ff7-88c8f3b9e13e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-26 00:58:32,386 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1] [2022-11-26 00:58:32,390 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-26 00:58:32,426 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.11 12:58:32 BoogieIcfgContainer [2022-11-26 00:58:32,426 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-26 00:58:32,427 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-26 00:58:32,427 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-26 00:58:32,428 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-26 00:58:32,428 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:58:17" (3/4) ... [2022-11-26 00:58:32,430 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-11-26 00:58:32,489 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55f7e60-0828-4eaf-9ff7-88c8f3b9e13e/bin/utaipan-ByfvJB40ur/witness.graphml [2022-11-26 00:58:32,491 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-26 00:58:32,492 INFO L158 Benchmark]: Toolchain (without parser) took 15963.17ms. Allocated memory was 138.4MB in the beginning and 218.1MB in the end (delta: 79.7MB). Free memory was 82.4MB in the beginning and 101.6MB in the end (delta: -19.3MB). Peak memory consumption was 60.8MB. Max. memory is 16.1GB. [2022-11-26 00:58:32,494 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 138.4MB. Free memory was 102.4MB in the beginning and 102.4MB in the end (delta: 25.5kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-26 00:58:32,494 INFO L158 Benchmark]: CACSL2BoogieTranslator took 351.37ms. Allocated memory is still 138.4MB. Free memory was 82.4MB in the beginning and 71.5MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-26 00:58:32,495 INFO L158 Benchmark]: Boogie Procedure Inliner took 63.21ms. Allocated memory is still 138.4MB. Free memory was 71.5MB in the beginning and 69.8MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-26 00:58:32,495 INFO L158 Benchmark]: Boogie Preprocessor took 50.72ms. Allocated memory is still 138.4MB. Free memory was 69.8MB in the beginning and 68.7MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-26 00:58:32,496 INFO L158 Benchmark]: RCFGBuilder took 564.64ms. Allocated memory was 138.4MB in the beginning and 180.4MB in the end (delta: 41.9MB). Free memory was 68.7MB in the beginning and 138.7MB in the end (delta: -70.1MB). Peak memory consumption was 10.2MB. Max. memory is 16.1GB. [2022-11-26 00:58:32,496 INFO L158 Benchmark]: TraceAbstraction took 14858.45ms. Allocated memory was 180.4MB in the beginning and 218.1MB in the end (delta: 37.7MB). Free memory was 137.9MB in the beginning and 104.8MB in the end (delta: 33.1MB). Peak memory consumption was 71.6MB. Max. memory is 16.1GB. [2022-11-26 00:58:32,497 INFO L158 Benchmark]: Witness Printer took 64.15ms. Allocated memory is still 218.1MB. Free memory was 104.8MB in the beginning and 101.6MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-26 00:58:32,499 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 138.4MB. Free memory was 102.4MB in the beginning and 102.4MB in the end (delta: 25.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 351.37ms. Allocated memory is still 138.4MB. Free memory was 82.4MB in the beginning and 71.5MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 63.21ms. Allocated memory is still 138.4MB. Free memory was 71.5MB in the beginning and 69.8MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 50.72ms. Allocated memory is still 138.4MB. Free memory was 69.8MB in the beginning and 68.7MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 564.64ms. Allocated memory was 138.4MB in the beginning and 180.4MB in the end (delta: 41.9MB). Free memory was 68.7MB in the beginning and 138.7MB in the end (delta: -70.1MB). Peak memory consumption was 10.2MB. Max. memory is 16.1GB. * TraceAbstraction took 14858.45ms. Allocated memory was 180.4MB in the beginning and 218.1MB in the end (delta: 37.7MB). Free memory was 137.9MB in the beginning and 104.8MB in the end (delta: 33.1MB). Peak memory consumption was 71.6MB. Max. memory is 16.1GB. * Witness Printer took 64.15ms. Allocated memory is still 218.1MB. Free memory was 104.8MB in the beginning and 101.6MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 14]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int counter = 0; [L21] int x, y; [L22] long long a, b, p, q; [L24] x = __VERIFIER_nondet_int() [L25] y = __VERIFIER_nondet_int() [L26] CALL assume_abort_if_not(y >= 1) [L9] COND FALSE !(!cond) [L26] RET assume_abort_if_not(y >= 1) [L28] a = x [L29] b = y [L30] p = 1 [L31] q = 0 VAL [a=-3, b=3, counter=0, p=1, q=0, x=-3, y=3] [L33] EXPR counter++ VAL [a=-3, b=3, counter=1, counter++=0, p=1, q=0, x=-3, y=3] [L33] COND TRUE counter++<2 [L34] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [\old(cond)=1, counter=1] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L34] RET __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [a=-3, b=3, counter=1, p=1, q=0, x=-3, y=3] [L36] COND FALSE !(!(a != 0 && b != 0)) [L39] COND FALSE !(a % 2 == 0 && b % 2 == 0) [L43] COND FALSE !(a % 2 == 1 && b % 2 == 0) [L46] COND FALSE !(a % 2 == 0 && b % 2 == 1) [L50] a = a - 1 [L51] b = b - 1 [L52] q = q + (a + b + 1) * p VAL [a=-4, b=2, counter=1, p=1, q=-1, x=-3, y=3] [L33] EXPR counter++ VAL [a=-4, b=2, counter=2, counter++=1, p=1, q=-1, x=-3, y=3] [L33] COND TRUE counter++<2 [L34] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [\old(cond)=1, counter=2] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L34] RET __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [a=-4, b=2, counter=2, p=1, q=-1, x=-3, y=3] [L36] COND FALSE !(!(a != 0 && b != 0)) [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [a=-2, b=1, counter=2, p=4, q=-1, x=-3, y=3] [L33] EXPR counter++ VAL [a=-2, b=1, counter=3, counter++=2, p=4, q=-1, x=-3, y=3] [L33] COND FALSE !(counter++<2) [L56] CALL __VERIFIER_assert(q == (long long) x * y) VAL [\old(cond)=0, counter=3] [L12] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, counter=3] [L14] reach_error() VAL [\old(cond)=0, cond=0, counter=3] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 15 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 14.7s, OverallIterations: 8, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 51 SdHoareTripleChecker+Valid, 0.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 42 mSDsluCounter, 269 SdHoareTripleChecker+Invalid, 0.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 187 mSDsCounter, 11 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 322 IncrementalHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 11 mSolverCounterUnsat, 82 mSDtfsCounter, 322 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 207 GetRequests, 123 SyntacticMatches, 6 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 4.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=7, InterpolantAutomatonStates: 43, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 7 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 3.5s InterpolantComputationTime, 120 NumberOfCodeBlocks, 120 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 137 ConstructedInterpolants, 2 QuantifiedInterpolants, 899 SizeOfPredicates, 29 NumberOfNonLiveVariables, 473 ConjunctsInSsa, 85 ConjunctsInUnsatCore, 11 InterpolantComputations, 3 PerfectInterpolantSequences, 33/46 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: 0.4s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 2, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 11, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 11, TOOLS_POST_TIME: 0.1s, TOOLS_POST_CALL_APPLICATIONS: 4, TOOLS_POST_CALL_TIME: 0.2s, TOOLS_POST_RETURN_APPLICATIONS: 2, TOOLS_POST_RETURN_TIME: 0.0s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 17, TOOLS_QUANTIFIERELIM_TIME: 0.2s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.1s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 29, 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: 11, 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: 66, DAG_COMPRESSION_RETAINED_NODES: 33, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-11-26 00:58:32,523 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d55f7e60-0828-4eaf-9ff7-88c8f3b9e13e/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE