./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_unwindbound10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e7a5b5-eab7-46ff-a021-7e142d66d0e6/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e7a5b5-eab7-46ff-a021-7e142d66d0e6/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e7a5b5-eab7-46ff-a021-7e142d66d0e6/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e7a5b5-eab7-46ff-a021-7e142d66d0e6/bin/utaipan-g80aRyZoba/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_unwindbound10.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e7a5b5-eab7-46ff-a021-7e142d66d0e6/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e7a5b5-eab7-46ff-a021-7e142d66d0e6/bin/utaipan-g80aRyZoba --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0a6d36c45579adaf3871b264b96aba9fa14294bc645c23d191a4e77c149500df --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-b5237d8 [2022-11-22 02:37:02,635 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 02:37:02,638 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 02:37:02,685 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 02:37:02,687 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 02:37:02,689 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 02:37:02,691 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 02:37:02,696 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 02:37:02,698 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 02:37:02,700 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 02:37:02,702 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 02:37:02,705 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 02:37:02,706 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 02:37:02,711 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 02:37:02,713 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 02:37:02,715 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 02:37:02,717 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 02:37:02,719 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 02:37:02,721 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 02:37:02,726 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 02:37:02,728 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 02:37:02,730 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 02:37:02,732 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 02:37:02,733 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 02:37:02,740 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 02:37:02,741 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 02:37:02,741 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 02:37:02,743 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 02:37:02,743 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 02:37:02,744 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 02:37:02,745 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 02:37:02,746 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 02:37:02,748 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 02:37:02,750 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 02:37:02,766 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 02:37:02,766 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 02:37:02,767 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 02:37:02,767 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 02:37:02,767 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 02:37:02,768 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 02:37:02,768 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 02:37:02,769 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e7a5b5-eab7-46ff-a021-7e142d66d0e6/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-22 02:37:02,796 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 02:37:02,796 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 02:37:02,796 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 02:37:02,797 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 02:37:02,797 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 02:37:02,797 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 02:37:02,798 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 02:37:02,798 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 02:37:02,798 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 02:37:02,798 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 02:37:02,798 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 02:37:02,798 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 02:37:02,799 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 02:37:02,799 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 02:37:02,799 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 02:37:02,799 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 02:37:02,799 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 02:37:02,800 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 02:37:02,800 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 02:37:02,800 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 02:37:02,801 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 02:37:02,801 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 02:37:02,801 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 02:37:02,801 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 02:37:02,801 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 02:37:02,802 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 02:37:02,802 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 02:37:02,802 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 02:37:02,802 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 02:37:02,802 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 02:37:02,802 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 02:37:02,803 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 02:37:02,803 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:37:02,803 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 02:37:02,803 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 02:37:02,803 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 02:37:02,804 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 02:37:02,804 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 02:37:02,804 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 02:37:02,804 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 02:37:02,804 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 02:37:02,805 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_c2e7a5b5-eab7-46ff-a021-7e142d66d0e6/bin/utaipan-g80aRyZoba/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e7a5b5-eab7-46ff-a021-7e142d66d0e6/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0a6d36c45579adaf3871b264b96aba9fa14294bc645c23d191a4e77c149500df [2022-11-22 02:37:03,109 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 02:37:03,170 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 02:37:03,172 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 02:37:03,174 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 02:37:03,175 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 02:37:03,176 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e7a5b5-eab7-46ff-a021-7e142d66d0e6/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_unwindbound10.c [2022-11-22 02:37:06,190 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 02:37:06,413 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 02:37:06,414 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e7a5b5-eab7-46ff-a021-7e142d66d0e6/sv-benchmarks/c/nla-digbench-scaling/egcd-ll_unwindbound10.c [2022-11-22 02:37:06,422 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e7a5b5-eab7-46ff-a021-7e142d66d0e6/bin/utaipan-g80aRyZoba/data/2a00d93b7/a886919aa32a4a7084f3473839c4a243/FLAG4be51ee90 [2022-11-22 02:37:06,437 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e7a5b5-eab7-46ff-a021-7e142d66d0e6/bin/utaipan-g80aRyZoba/data/2a00d93b7/a886919aa32a4a7084f3473839c4a243 [2022-11-22 02:37:06,440 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 02:37:06,442 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 02:37:06,446 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 02:37:06,446 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 02:37:06,450 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 02:37:06,450 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:37:06" (1/1) ... [2022-11-22 02:37:06,451 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@511e270 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:37:06, skipping insertion in model container [2022-11-22 02:37:06,452 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:37:06" (1/1) ... [2022-11-22 02:37:06,459 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 02:37:06,479 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 02:37:06,651 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_c2e7a5b5-eab7-46ff-a021-7e142d66d0e6/sv-benchmarks/c/nla-digbench-scaling/egcd-ll_unwindbound10.c[489,502] [2022-11-22 02:37:06,667 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:37:06,677 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 02:37:06,687 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_c2e7a5b5-eab7-46ff-a021-7e142d66d0e6/sv-benchmarks/c/nla-digbench-scaling/egcd-ll_unwindbound10.c[489,502] [2022-11-22 02:37:06,694 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:37:06,707 INFO L208 MainTranslator]: Completed translation [2022-11-22 02:37:06,708 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:37:06 WrapperNode [2022-11-22 02:37:06,708 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 02:37:06,709 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 02:37:06,709 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 02:37:06,710 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 02:37:06,716 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:37:06" (1/1) ... [2022-11-22 02:37:06,721 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:37:06" (1/1) ... [2022-11-22 02:37:06,738 INFO L138 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 59 [2022-11-22 02:37:06,738 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 02:37:06,739 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 02:37:06,739 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 02:37:06,740 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 02:37:06,748 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:37:06" (1/1) ... [2022-11-22 02:37:06,749 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:37:06" (1/1) ... [2022-11-22 02:37:06,750 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:37:06" (1/1) ... [2022-11-22 02:37:06,750 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:37:06" (1/1) ... [2022-11-22 02:37:06,753 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:37:06" (1/1) ... [2022-11-22 02:37:06,757 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:37:06" (1/1) ... [2022-11-22 02:37:06,758 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:37:06" (1/1) ... [2022-11-22 02:37:06,759 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:37:06" (1/1) ... [2022-11-22 02:37:06,760 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 02:37:06,761 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 02:37:06,761 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 02:37:06,761 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 02:37:06,762 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:37:06" (1/1) ... [2022-11-22 02:37:06,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:37:06,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e7a5b5-eab7-46ff-a021-7e142d66d0e6/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:37:06,790 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e7a5b5-eab7-46ff-a021-7e142d66d0e6/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 02:37:06,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e7a5b5-eab7-46ff-a021-7e142d66d0e6/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 02:37:06,825 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 02:37:06,826 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-22 02:37:06,826 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-22 02:37:06,826 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 02:37:06,826 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 02:37:06,826 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 02:37:06,826 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-22 02:37:06,827 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-22 02:37:06,895 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 02:37:06,897 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 02:37:07,092 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 02:37:07,141 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 02:37:07,147 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-22 02:37:07,151 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:37:07 BoogieIcfgContainer [2022-11-22 02:37:07,151 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 02:37:07,153 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 02:37:07,153 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 02:37:07,164 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 02:37:07,165 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 02:37:06" (1/3) ... [2022-11-22 02:37:07,165 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35bcc33e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:37:07, skipping insertion in model container [2022-11-22 02:37:07,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:37:06" (2/3) ... [2022-11-22 02:37:07,166 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35bcc33e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:37:07, skipping insertion in model container [2022-11-22 02:37:07,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:37:07" (3/3) ... [2022-11-22 02:37:07,168 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd-ll_unwindbound10.c [2022-11-22 02:37:07,196 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 02:37:07,197 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-22 02:37:07,274 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 02:37:07,281 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;@160f3068, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 02:37:07,282 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-22 02:37:07,285 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-22 02:37:07,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-22 02:37:07,294 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:37:07,294 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:37:07,295 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:37:07,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:37:07,300 INFO L85 PathProgramCache]: Analyzing trace with hash 2091718616, now seen corresponding path program 1 times [2022-11-22 02:37:07,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:37:07,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142437126] [2022-11-22 02:37:07,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:37:07,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:37:07,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:37:07,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 02:37:07,491 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:37:07,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142437126] [2022-11-22 02:37:07,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142437126] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:37:07,492 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:37:07,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 02:37:07,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112435556] [2022-11-22 02:37:07,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:37:07,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-22 02:37:07,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:37:07,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-22 02:37:07,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-22 02:37:07,544 INFO L87 Difference]: Start difference. First operand has 24 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-22 02:37:07,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:37:07,579 INFO L93 Difference]: Finished difference Result 42 states and 68 transitions. [2022-11-22 02:37:07,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-22 02:37:07,588 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 13 [2022-11-22 02:37:07,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:37:07,596 INFO L225 Difference]: With dead ends: 42 [2022-11-22 02:37:07,596 INFO L226 Difference]: Without dead ends: 22 [2022-11-22 02:37:07,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-22 02:37:07,614 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:37:07,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 02:37:07,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-11-22 02:37:07,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-11-22 02:37:07,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-22 02:37:07,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 30 transitions. [2022-11-22 02:37:07,651 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 30 transitions. Word has length 13 [2022-11-22 02:37:07,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:37:07,652 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 30 transitions. [2022-11-22 02:37:07,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-22 02:37:07,652 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 30 transitions. [2022-11-22 02:37:07,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-22 02:37:07,654 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:37:07,654 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:37:07,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 02:37:07,655 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:37:07,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:37:07,656 INFO L85 PathProgramCache]: Analyzing trace with hash -234462492, now seen corresponding path program 1 times [2022-11-22 02:37:07,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:37:07,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933732303] [2022-11-22 02:37:07,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:37:07,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:37:07,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:37:07,804 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 02:37:07,806 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:37:07,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933732303] [2022-11-22 02:37:07,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933732303] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:37:07,808 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:37:07,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 02:37:07,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845716539] [2022-11-22 02:37:07,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:37:07,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:37:07,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:37:07,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:37:07,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:37:07,822 INFO L87 Difference]: Start difference. First operand 22 states and 30 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-22 02:37:07,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:37:07,855 INFO L93 Difference]: Finished difference Result 34 states and 45 transitions. [2022-11-22 02:37:07,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 02:37:07,856 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 14 [2022-11-22 02:37:07,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:37:07,857 INFO L225 Difference]: With dead ends: 34 [2022-11-22 02:37:07,858 INFO L226 Difference]: Without dead ends: 24 [2022-11-22 02:37:07,858 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:37:07,860 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 3 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:37:07,861 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 69 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 02:37:07,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-22 02:37:07,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-11-22 02:37:07,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-22 02:37:07,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 32 transitions. [2022-11-22 02:37:07,869 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 32 transitions. Word has length 14 [2022-11-22 02:37:07,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:37:07,869 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 32 transitions. [2022-11-22 02:37:07,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-22 02:37:07,870 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 32 transitions. [2022-11-22 02:37:07,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-22 02:37:07,885 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:37:07,886 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:37:07,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-22 02:37:07,886 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:37:07,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:37:07,887 INFO L85 PathProgramCache]: Analyzing trace with hash -232794196, now seen corresponding path program 1 times [2022-11-22 02:37:07,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:37:07,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773610192] [2022-11-22 02:37:07,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:37:07,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:37:07,921 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 02:37:07,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [236808804] [2022-11-22 02:37:07,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:37:07,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:37:07,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e7a5b5-eab7-46ff-a021-7e142d66d0e6/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:37:07,930 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e7a5b5-eab7-46ff-a021-7e142d66d0e6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:37:07,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e7a5b5-eab7-46ff-a021-7e142d66d0e6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 02:37:08,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:37:08,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-22 02:37:08,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:37:08,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 02:37:08,204 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:37:08,205 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:37:08,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773610192] [2022-11-22 02:37:08,205 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 02:37:08,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236808804] [2022-11-22 02:37:08,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236808804] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:37:08,206 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:37:08,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-22 02:37:08,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307327257] [2022-11-22 02:37:08,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:37:08,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 02:37:08,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:37:08,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 02:37:08,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:37:08,208 INFO L87 Difference]: Start difference. First operand 24 states and 32 transitions. Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-22 02:37:08,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:37:08,306 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2022-11-22 02:37:08,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 02:37:08,307 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 14 [2022-11-22 02:37:08,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:37:08,308 INFO L225 Difference]: With dead ends: 38 [2022-11-22 02:37:08,308 INFO L226 Difference]: Without dead ends: 36 [2022-11-22 02:37:08,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:37:08,310 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 6 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:37:08,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 109 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:37:08,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-11-22 02:37:08,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2022-11-22 02:37:08,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 16 states have (on average 1.25) internal successors, (20), 18 states have internal predecessors, (20), 15 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-22 02:37:08,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 49 transitions. [2022-11-22 02:37:08,328 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 49 transitions. Word has length 14 [2022-11-22 02:37:08,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:37:08,329 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 49 transitions. [2022-11-22 02:37:08,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-22 02:37:08,330 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 49 transitions. [2022-11-22 02:37:08,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-22 02:37:08,333 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:37:08,333 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:37:08,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e7a5b5-eab7-46ff-a021-7e142d66d0e6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-22 02:37:08,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e7a5b5-eab7-46ff-a021-7e142d66d0e6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:37:08,534 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:37:08,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:37:08,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1519768090, now seen corresponding path program 1 times [2022-11-22 02:37:08,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:37:08,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816840964] [2022-11-22 02:37:08,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:37:08,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:37:08,553 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 02:37:08,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1825828375] [2022-11-22 02:37:08,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:37:08,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:37:08,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e7a5b5-eab7-46ff-a021-7e142d66d0e6/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:37:08,562 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e7a5b5-eab7-46ff-a021-7e142d66d0e6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:37:08,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e7a5b5-eab7-46ff-a021-7e142d66d0e6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-22 02:37:08,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:37:08,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-22 02:37:08,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:37:08,865 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 02:37:08,865 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:37:08,866 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:37:08,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816840964] [2022-11-22 02:37:08,866 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 02:37:08,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825828375] [2022-11-22 02:37:08,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825828375] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:37:08,874 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:37:08,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-22 02:37:08,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742476715] [2022-11-22 02:37:08,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:37:08,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-22 02:37:08,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:37:08,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-22 02:37:08,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-22 02:37:08,880 INFO L87 Difference]: Start difference. First operand 35 states and 49 transitions. Second operand has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-22 02:37:09,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:37:09,076 INFO L93 Difference]: Finished difference Result 42 states and 55 transitions. [2022-11-22 02:37:09,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-22 02:37:09,094 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 19 [2022-11-22 02:37:09,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:37:09,095 INFO L225 Difference]: With dead ends: 42 [2022-11-22 02:37:09,095 INFO L226 Difference]: Without dead ends: 40 [2022-11-22 02:37:09,095 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-11-22 02:37:09,097 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 16 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:37:09,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 102 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:37:09,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-11-22 02:37:09,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2022-11-22 02:37:09,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 21 states have internal predecessors, (23), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-22 02:37:09,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 52 transitions. [2022-11-22 02:37:09,122 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 52 transitions. Word has length 19 [2022-11-22 02:37:09,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:37:09,123 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 52 transitions. [2022-11-22 02:37:09,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-22 02:37:09,123 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 52 transitions. [2022-11-22 02:37:09,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-22 02:37:09,124 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:37:09,124 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:37:09,141 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e7a5b5-eab7-46ff-a021-7e142d66d0e6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-22 02:37:09,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e7a5b5-eab7-46ff-a021-7e142d66d0e6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:37:09,325 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:37:09,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:37:09,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1808022612, now seen corresponding path program 1 times [2022-11-22 02:37:09,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:37:09,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829362388] [2022-11-22 02:37:09,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:37:09,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:37:09,339 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 02:37:09,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [489152248] [2022-11-22 02:37:09,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:37:09,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:37:09,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e7a5b5-eab7-46ff-a021-7e142d66d0e6/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:37:09,347 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e7a5b5-eab7-46ff-a021-7e142d66d0e6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:37:09,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e7a5b5-eab7-46ff-a021-7e142d66d0e6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-22 02:37:09,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:37:09,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-22 02:37:09,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:37:09,605 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 02:37:09,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:37:09,761 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:37:09,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829362388] [2022-11-22 02:37:09,761 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 02:37:09,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489152248] [2022-11-22 02:37:09,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489152248] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:37:09,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1952695356] [2022-11-22 02:37:09,782 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-22 02:37:09,783 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:37:09,786 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:37:09,792 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:37:09,792 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:37:10,439 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2022-11-22 02:37:10,455 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 69 for LOIs [2022-11-22 02:37:10,511 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:37:11,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1952695356] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:37:11,982 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:37:11,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [10] total 20 [2022-11-22 02:37:11,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268833057] [2022-11-22 02:37:11,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:37:11,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-22 02:37:11,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:37:11,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-22 02:37:11,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-11-22 02:37:11,993 INFO L87 Difference]: Start difference. First operand 39 states and 52 transitions. Second operand has 12 states, 8 states have (on average 1.25) internal successors, (10), 7 states have internal predecessors, (10), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-22 02:37:12,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:37:12,264 INFO L93 Difference]: Finished difference Result 46 states and 58 transitions. [2022-11-22 02:37:12,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-22 02:37:12,265 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 8 states have (on average 1.25) internal successors, (10), 7 states have internal predecessors, (10), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 24 [2022-11-22 02:37:12,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:37:12,267 INFO L225 Difference]: With dead ends: 46 [2022-11-22 02:37:12,267 INFO L226 Difference]: Without dead ends: 42 [2022-11-22 02:37:12,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 29 SyntacticMatches, 7 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-11-22 02:37:12,270 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 7 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:37:12,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 82 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 02:37:12,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-11-22 02:37:12,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-11-22 02:37:12,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 24 states have internal predecessors, (26), 14 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-22 02:37:12,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 52 transitions. [2022-11-22 02:37:12,287 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 52 transitions. Word has length 24 [2022-11-22 02:37:12,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:37:12,287 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 52 transitions. [2022-11-22 02:37:12,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 8 states have (on average 1.25) internal successors, (10), 7 states have internal predecessors, (10), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-22 02:37:12,288 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 52 transitions. [2022-11-22 02:37:12,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-22 02:37:12,288 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:37:12,289 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:37:12,297 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e7a5b5-eab7-46ff-a021-7e142d66d0e6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-22 02:37:12,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e7a5b5-eab7-46ff-a021-7e142d66d0e6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:37:12,494 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:37:12,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:37:12,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1397146583, now seen corresponding path program 1 times [2022-11-22 02:37:12,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:37:12,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628853995] [2022-11-22 02:37:12,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:37:12,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:37:12,507 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 02:37:12,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1271530438] [2022-11-22 02:37:12,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:37:12,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:37:12,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e7a5b5-eab7-46ff-a021-7e142d66d0e6/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:37:12,509 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e7a5b5-eab7-46ff-a021-7e142d66d0e6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:37:12,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e7a5b5-eab7-46ff-a021-7e142d66d0e6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-22 02:37:12,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:37:12,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-22 02:37:12,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:37:12,591 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-22 02:37:12,591 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:37:12,591 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:37:12,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628853995] [2022-11-22 02:37:12,592 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 02:37:12,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271530438] [2022-11-22 02:37:12,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271530438] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:37:12,592 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:37:12,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-22 02:37:12,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530602952] [2022-11-22 02:37:12,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:37:12,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:37:12,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:37:12,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:37:12,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:37:12,594 INFO L87 Difference]: Start difference. First operand 42 states and 52 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-22 02:37:12,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:37:12,656 INFO L93 Difference]: Finished difference Result 52 states and 64 transitions. [2022-11-22 02:37:12,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:37:12,656 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 30 [2022-11-22 02:37:12,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:37:12,657 INFO L225 Difference]: With dead ends: 52 [2022-11-22 02:37:12,658 INFO L226 Difference]: Without dead ends: 50 [2022-11-22 02:37:12,658 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:37:12,659 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 5 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:37:12,659 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 100 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 02:37:12,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-22 02:37:12,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2022-11-22 02:37:12,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 25 states have (on average 1.16) internal successors, (29), 28 states have internal predecessors, (29), 15 states have call successors, (15), 6 states have call predecessors, (15), 6 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-22 02:37:12,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 57 transitions. [2022-11-22 02:37:12,676 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 57 transitions. Word has length 30 [2022-11-22 02:37:12,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:37:12,676 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 57 transitions. [2022-11-22 02:37:12,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-22 02:37:12,677 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 57 transitions. [2022-11-22 02:37:12,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-22 02:37:12,678 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:37:12,678 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:37:12,688 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e7a5b5-eab7-46ff-a021-7e142d66d0e6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-22 02:37:12,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e7a5b5-eab7-46ff-a021-7e142d66d0e6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:37:12,884 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:37:12,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:37:12,885 INFO L85 PathProgramCache]: Analyzing trace with hash 882095404, now seen corresponding path program 1 times [2022-11-22 02:37:12,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:37:12,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370365019] [2022-11-22 02:37:12,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:37:12,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:37:12,900 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 02:37:12,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1514818245] [2022-11-22 02:37:12,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:37:12,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:37:12,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e7a5b5-eab7-46ff-a021-7e142d66d0e6/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:37:12,911 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e7a5b5-eab7-46ff-a021-7e142d66d0e6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:37:12,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e7a5b5-eab7-46ff-a021-7e142d66d0e6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-22 02:37:12,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:37:12,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-22 02:37:12,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:37:13,034 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-22 02:37:13,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:37:13,087 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-22 02:37:13,088 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:37:13,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370365019] [2022-11-22 02:37:13,088 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 02:37:13,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514818245] [2022-11-22 02:37:13,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514818245] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:37:13,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [280697858] [2022-11-22 02:37:13,092 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2022-11-22 02:37:13,092 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:37:13,093 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:37:13,093 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:37:13,093 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:37:16,106 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 11 for LOIs [2022-11-22 02:37:16,112 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 69 for LOIs [2022-11-22 02:37:16,138 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:37:17,453 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1260#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 02:37:17,454 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:37:17,454 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 02:37:17,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2022-11-22 02:37:17,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373958584] [2022-11-22 02:37:17,454 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 02:37:17,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-22 02:37:17,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:37:17,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-22 02:37:17,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2022-11-22 02:37:17,456 INFO L87 Difference]: Start difference. First operand 47 states and 57 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-22 02:37:17,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:37:17,635 INFO L93 Difference]: Finished difference Result 109 states and 132 transitions. [2022-11-22 02:37:17,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-22 02:37:17,636 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 32 [2022-11-22 02:37:17,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:37:17,638 INFO L225 Difference]: With dead ends: 109 [2022-11-22 02:37:17,638 INFO L226 Difference]: Without dead ends: 97 [2022-11-22 02:37:17,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2022-11-22 02:37:17,640 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 64 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:37:17,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 167 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:37:17,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-11-22 02:37:17,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 91. [2022-11-22 02:37:17,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 50 states have (on average 1.16) internal successors, (58), 54 states have internal predecessors, (58), 29 states have call successors, (29), 12 states have call predecessors, (29), 11 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2022-11-22 02:37:17,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 112 transitions. [2022-11-22 02:37:17,658 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 112 transitions. Word has length 32 [2022-11-22 02:37:17,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:37:17,658 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 112 transitions. [2022-11-22 02:37:17,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-22 02:37:17,659 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 112 transitions. [2022-11-22 02:37:17,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-22 02:37:17,660 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:37:17,660 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:37:17,671 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e7a5b5-eab7-46ff-a021-7e142d66d0e6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-22 02:37:17,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e7a5b5-eab7-46ff-a021-7e142d66d0e6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-22 02:37:17,866 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:37:17,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:37:17,866 INFO L85 PathProgramCache]: Analyzing trace with hash 883763700, now seen corresponding path program 1 times [2022-11-22 02:37:17,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:37:17,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673952110] [2022-11-22 02:37:17,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:37:17,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:37:17,877 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 02:37:17,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1499468569] [2022-11-22 02:37:17,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:37:17,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:37:17,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e7a5b5-eab7-46ff-a021-7e142d66d0e6/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:37:17,882 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e7a5b5-eab7-46ff-a021-7e142d66d0e6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:37:17,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e7a5b5-eab7-46ff-a021-7e142d66d0e6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-22 02:37:17,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:37:17,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-22 02:37:17,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:37:18,123 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-22 02:37:18,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:37:18,269 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-22 02:37:18,269 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:37:18,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673952110] [2022-11-22 02:37:18,269 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 02:37:18,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499468569] [2022-11-22 02:37:18,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499468569] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-22 02:37:18,270 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:37:18,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 10 [2022-11-22 02:37:18,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944093185] [2022-11-22 02:37:18,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:37:18,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:37:18,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:37:18,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:37:18,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-22 02:37:18,272 INFO L87 Difference]: Start difference. First operand 91 states and 112 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-22 02:37:18,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:37:18,347 INFO L93 Difference]: Finished difference Result 105 states and 125 transitions. [2022-11-22 02:37:18,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 02:37:18,348 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2022-11-22 02:37:18,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:37:18,351 INFO L225 Difference]: With dead ends: 105 [2022-11-22 02:37:18,351 INFO L226 Difference]: Without dead ends: 103 [2022-11-22 02:37:18,352 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-11-22 02:37:18,352 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 8 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:37:18,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 63 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 02:37:18,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-11-22 02:37:18,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2022-11-22 02:37:18,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 59 states have (on average 1.1355932203389831) internal successors, (67), 63 states have internal predecessors, (67), 29 states have call successors, (29), 15 states have call predecessors, (29), 14 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2022-11-22 02:37:18,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 121 transitions. [2022-11-22 02:37:18,374 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 121 transitions. Word has length 32 [2022-11-22 02:37:18,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:37:18,375 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 121 transitions. [2022-11-22 02:37:18,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-22 02:37:18,375 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 121 transitions. [2022-11-22 02:37:18,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-22 02:37:18,376 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:37:18,376 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:37:18,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e7a5b5-eab7-46ff-a021-7e142d66d0e6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-22 02:37:18,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e7a5b5-eab7-46ff-a021-7e142d66d0e6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:37:18,583 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:37:18,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:37:18,583 INFO L85 PathProgramCache]: Analyzing trace with hash 481580745, now seen corresponding path program 1 times [2022-11-22 02:37:18,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:37:18,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291965360] [2022-11-22 02:37:18,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:37:18,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:37:18,591 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 02:37:18,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [276339809] [2022-11-22 02:37:18,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:37:18,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:37:18,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e7a5b5-eab7-46ff-a021-7e142d66d0e6/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:37:18,600 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e7a5b5-eab7-46ff-a021-7e142d66d0e6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:37:18,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e7a5b5-eab7-46ff-a021-7e142d66d0e6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-22 02:37:18,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:37:18,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-22 02:37:18,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:37:18,749 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-22 02:37:18,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:37:18,880 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-22 02:37:18,880 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:37:18,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291965360] [2022-11-22 02:37:18,880 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 02:37:18,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276339809] [2022-11-22 02:37:18,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276339809] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:37:18,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1708924495] [2022-11-22 02:37:18,883 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-11-22 02:37:18,884 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:37:18,884 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:37:18,884 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:37:18,884 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:37:19,322 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2022-11-22 02:37:19,331 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 69 for LOIs [2022-11-22 02:37:19,356 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:37:21,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1708924495] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:37:21,037 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-22 02:37:21,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [9, 8] total 23 [2022-11-22 02:37:21,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971613526] [2022-11-22 02:37:21,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:37:21,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-22 02:37:21,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:37:21,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-22 02:37:21,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-11-22 02:37:21,039 INFO L87 Difference]: Start difference. First operand 103 states and 121 transitions. Second operand has 13 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-22 02:37:21,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:37:21,283 INFO L93 Difference]: Finished difference Result 105 states and 122 transitions. [2022-11-22 02:37:21,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-22 02:37:21,283 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 35 [2022-11-22 02:37:21,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:37:21,286 INFO L225 Difference]: With dead ends: 105 [2022-11-22 02:37:21,286 INFO L226 Difference]: Without dead ends: 95 [2022-11-22 02:37:21,288 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 70 SyntacticMatches, 12 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-11-22 02:37:21,290 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 6 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:37:21,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 85 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 02:37:21,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-11-22 02:37:21,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2022-11-22 02:37:21,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 54 states have (on average 1.1296296296296295) internal successors, (61), 58 states have internal predecessors, (61), 27 states have call successors, (27), 13 states have call predecessors, (27), 13 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2022-11-22 02:37:21,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 112 transitions. [2022-11-22 02:37:21,321 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 112 transitions. Word has length 35 [2022-11-22 02:37:21,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:37:21,323 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 112 transitions. [2022-11-22 02:37:21,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-22 02:37:21,323 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 112 transitions. [2022-11-22 02:37:21,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-22 02:37:21,327 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:37:21,327 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:37:21,338 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e7a5b5-eab7-46ff-a021-7e142d66d0e6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-22 02:37:21,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e7a5b5-eab7-46ff-a021-7e142d66d0e6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:37:21,533 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:37:21,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:37:21,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1530726558, now seen corresponding path program 2 times [2022-11-22 02:37:21,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:37:21,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763670113] [2022-11-22 02:37:21,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:37:21,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:37:21,542 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 02:37:21,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [929549347] [2022-11-22 02:37:21,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 02:37:21,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:37:21,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e7a5b5-eab7-46ff-a021-7e142d66d0e6/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:37:21,543 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e7a5b5-eab7-46ff-a021-7e142d66d0e6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:37:21,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e7a5b5-eab7-46ff-a021-7e142d66d0e6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-22 02:37:21,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-22 02:37:21,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:37:21,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-22 02:37:21,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:37:21,959 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-22 02:37:21,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:37:22,329 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-22 02:37:22,330 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:37:22,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763670113] [2022-11-22 02:37:22,330 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 02:37:22,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929549347] [2022-11-22 02:37:22,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929549347] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:37:22,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1439116112] [2022-11-22 02:37:22,332 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-22 02:37:22,333 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:37:22,333 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:37:22,333 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:37:22,333 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:37:24,430 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 11 for LOIs [2022-11-22 02:37:24,435 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 69 for LOIs [2022-11-22 02:37:24,458 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:37:26,307 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2833#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 02:37:26,308 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:37:26,308 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 02:37:26,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 13 [2022-11-22 02:37:26,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654843760] [2022-11-22 02:37:26,308 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 02:37:26,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-22 02:37:26,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:37:26,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-22 02:37:26,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2022-11-22 02:37:26,310 INFO L87 Difference]: Start difference. First operand 95 states and 112 transitions. Second operand has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 6 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 7 states have call predecessors, (12), 6 states have call successors, (12) [2022-11-22 02:37:29,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:37:29,302 INFO L93 Difference]: Finished difference Result 108 states and 126 transitions. [2022-11-22 02:37:29,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-22 02:37:29,303 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 6 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 7 states have call predecessors, (12), 6 states have call successors, (12) Word has length 37 [2022-11-22 02:37:29,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:37:29,304 INFO L225 Difference]: With dead ends: 108 [2022-11-22 02:37:29,304 INFO L226 Difference]: Without dead ends: 106 [2022-11-22 02:37:29,305 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=136, Invalid=920, Unknown=0, NotChecked=0, Total=1056 [2022-11-22 02:37:29,305 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 44 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-22 02:37:29,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 174 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-22 02:37:29,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-11-22 02:37:29,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 103. [2022-11-22 02:37:29,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 60 states have (on average 1.1166666666666667) internal successors, (67), 64 states have internal predecessors, (67), 27 states have call successors, (27), 15 states have call predecessors, (27), 15 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2022-11-22 02:37:29,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 118 transitions. [2022-11-22 02:37:29,332 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 118 transitions. Word has length 37 [2022-11-22 02:37:29,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:37:29,332 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 118 transitions. [2022-11-22 02:37:29,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 6 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 7 states have call predecessors, (12), 6 states have call successors, (12) [2022-11-22 02:37:29,333 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 118 transitions. [2022-11-22 02:37:29,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-22 02:37:29,335 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:37:29,335 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:37:29,345 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e7a5b5-eab7-46ff-a021-7e142d66d0e6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-22 02:37:29,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e7a5b5-eab7-46ff-a021-7e142d66d0e6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-22 02:37:29,541 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:37:29,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:37:29,541 INFO L85 PathProgramCache]: Analyzing trace with hash -333653004, now seen corresponding path program 3 times [2022-11-22 02:37:29,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:37:29,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635184382] [2022-11-22 02:37:29,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:37:29,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:37:29,558 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 02:37:29,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [787601765] [2022-11-22 02:37:29,559 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 02:37:29,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:37:29,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e7a5b5-eab7-46ff-a021-7e142d66d0e6/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:37:29,560 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e7a5b5-eab7-46ff-a021-7e142d66d0e6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:37:29,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e7a5b5-eab7-46ff-a021-7e142d66d0e6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-22 02:37:29,617 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 02:37:29,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:37:29,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-22 02:37:29,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:37:30,090 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-22 02:37:30,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:37:30,927 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 20 proven. 13 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-22 02:37:30,927 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:37:30,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635184382] [2022-11-22 02:37:30,928 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 02:37:30,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787601765] [2022-11-22 02:37:30,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787601765] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:37:30,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [536723822] [2022-11-22 02:37:30,930 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-22 02:37:30,930 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:37:30,931 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:37:30,931 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:37:30,931 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:37:33,001 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 11 for LOIs [2022-11-22 02:37:33,005 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 69 for LOIs [2022-11-22 02:37:33,031 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:37:34,953 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3429#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 02:37:34,953 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:37:34,953 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 02:37:34,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2022-11-22 02:37:34,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976468280] [2022-11-22 02:37:34,953 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 02:37:34,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-22 02:37:34,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:37:34,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-22 02:37:34,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=870, Unknown=0, NotChecked=0, Total=992 [2022-11-22 02:37:34,955 INFO L87 Difference]: Start difference. First operand 103 states and 118 transitions. Second operand has 17 states, 14 states have (on average 2.0) internal successors, (28), 12 states have internal predecessors, (28), 8 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 7 states have call predecessors, (14), 8 states have call successors, (14) [2022-11-22 02:37:36,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:37:36,353 INFO L93 Difference]: Finished difference Result 120 states and 136 transitions. [2022-11-22 02:37:36,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-22 02:37:36,353 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 2.0) internal successors, (28), 12 states have internal predecessors, (28), 8 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 7 states have call predecessors, (14), 8 states have call successors, (14) Word has length 42 [2022-11-22 02:37:36,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:37:36,355 INFO L225 Difference]: With dead ends: 120 [2022-11-22 02:37:36,355 INFO L226 Difference]: Without dead ends: 106 [2022-11-22 02:37:36,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=176, Invalid=1230, Unknown=0, NotChecked=0, Total=1406 [2022-11-22 02:37:36,356 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 49 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:37:36,356 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 93 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-22 02:37:36,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-11-22 02:37:36,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 97. [2022-11-22 02:37:36,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 62 states have (on average 1.0806451612903225) internal successors, (67), 64 states have internal predecessors, (67), 19 states have call successors, (19), 16 states have call predecessors, (19), 15 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-11-22 02:37:36,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 103 transitions. [2022-11-22 02:37:36,374 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 103 transitions. Word has length 42 [2022-11-22 02:37:36,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:37:36,375 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 103 transitions. [2022-11-22 02:37:36,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 2.0) internal successors, (28), 12 states have internal predecessors, (28), 8 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 7 states have call predecessors, (14), 8 states have call successors, (14) [2022-11-22 02:37:36,375 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 103 transitions. [2022-11-22 02:37:36,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-22 02:37:36,376 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:37:36,376 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:37:36,382 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e7a5b5-eab7-46ff-a021-7e142d66d0e6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-22 02:37:36,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e7a5b5-eab7-46ff-a021-7e142d66d0e6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-22 02:37:36,582 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:37:36,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:37:36,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1884634751, now seen corresponding path program 1 times [2022-11-22 02:37:36,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:37:36,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785710451] [2022-11-22 02:37:36,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:37:36,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:37:36,596 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 02:37:36,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [533943846] [2022-11-22 02:37:36,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:37:36,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:37:36,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e7a5b5-eab7-46ff-a021-7e142d66d0e6/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:37:36,597 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e7a5b5-eab7-46ff-a021-7e142d66d0e6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:37:36,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e7a5b5-eab7-46ff-a021-7e142d66d0e6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-22 02:37:36,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:37:36,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-22 02:37:36,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:37:36,720 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 41 proven. 5 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-22 02:37:36,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:37:36,855 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 41 proven. 5 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-22 02:37:36,856 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:37:36,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785710451] [2022-11-22 02:37:36,856 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 02:37:36,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533943846] [2022-11-22 02:37:36,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533943846] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:37:36,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1270971699] [2022-11-22 02:37:36,858 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-11-22 02:37:36,858 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:37:36,859 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:37:36,859 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:37:36,859 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:37:39,208 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 11 for LOIs [2022-11-22 02:37:39,212 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 69 for LOIs [2022-11-22 02:37:39,233 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:37:50,051 WARN L233 SmtUtils]: Spent 8.70s on a formula simplification. DAG size of input: 61 DAG size of output: 54 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:37:50,195 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4090#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 02:37:50,195 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:37:50,195 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 02:37:50,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2022-11-22 02:37:50,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200791393] [2022-11-22 02:37:50,195 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 02:37:50,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-22 02:37:50,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:37:50,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-22 02:37:50,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2022-11-22 02:37:50,197 INFO L87 Difference]: Start difference. First operand 97 states and 103 transitions. Second operand has 12 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2022-11-22 02:37:50,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:37:50,404 INFO L93 Difference]: Finished difference Result 104 states and 109 transitions. [2022-11-22 02:37:50,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-22 02:37:50,405 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) Word has length 53 [2022-11-22 02:37:50,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:37:50,405 INFO L225 Difference]: With dead ends: 104 [2022-11-22 02:37:50,406 INFO L226 Difference]: Without dead ends: 84 [2022-11-22 02:37:50,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=127, Invalid=743, Unknown=0, NotChecked=0, Total=870 [2022-11-22 02:37:50,408 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 18 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:37:50,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 81 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 02:37:50,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-11-22 02:37:50,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2022-11-22 02:37:50,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 54 states have (on average 1.037037037037037) internal successors, (56), 55 states have internal predecessors, (56), 16 states have call successors, (16), 13 states have call predecessors, (16), 13 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-22 02:37:50,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 87 transitions. [2022-11-22 02:37:50,423 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 87 transitions. Word has length 53 [2022-11-22 02:37:50,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:37:50,424 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 87 transitions. [2022-11-22 02:37:50,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2022-11-22 02:37:50,424 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 87 transitions. [2022-11-22 02:37:50,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-22 02:37:50,425 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:37:50,425 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:37:50,434 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e7a5b5-eab7-46ff-a021-7e142d66d0e6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-11-22 02:37:50,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e7a5b5-eab7-46ff-a021-7e142d66d0e6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-22 02:37:50,630 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:37:50,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:37:50,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1445886962, now seen corresponding path program 4 times [2022-11-22 02:37:50,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:37:50,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438009998] [2022-11-22 02:37:50,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:37:50,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:37:50,649 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 02:37:50,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [724612400] [2022-11-22 02:37:50,650 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-22 02:37:50,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:37:50,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e7a5b5-eab7-46ff-a021-7e142d66d0e6/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:37:50,651 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e7a5b5-eab7-46ff-a021-7e142d66d0e6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:37:50,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e7a5b5-eab7-46ff-a021-7e142d66d0e6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-22 02:37:50,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:37:50,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-22 02:37:50,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:37:53,793 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 66 proven. 48 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2022-11-22 02:37:53,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:37:54,187 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 76 proven. 8 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-11-22 02:37:54,187 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:37:54,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438009998] [2022-11-22 02:37:54,188 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 02:37:54,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724612400] [2022-11-22 02:37:54,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724612400] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:37:54,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [247735861] [2022-11-22 02:37:54,190 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-22 02:37:54,190 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:37:54,190 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:37:54,190 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:37:54,190 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:37:56,126 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 11 for LOIs [2022-11-22 02:37:56,130 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 69 for LOIs [2022-11-22 02:37:56,152 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:37:58,173 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4823#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 02:37:58,174 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:37:58,174 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 02:37:58,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 17 [2022-11-22 02:37:58,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623370469] [2022-11-22 02:37:58,174 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 02:37:58,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-22 02:37:58,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:37:58,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-22 02:37:58,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=868, Unknown=0, NotChecked=0, Total=992 [2022-11-22 02:37:58,176 INFO L87 Difference]: Start difference. First operand 84 states and 87 transitions. Second operand has 17 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 7 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (19), 9 states have call predecessors, (19), 7 states have call successors, (19) [2022-11-22 02:38:03,593 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-22 02:38:03,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:38:03,594 INFO L93 Difference]: Finished difference Result 94 states and 99 transitions. [2022-11-22 02:38:03,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-22 02:38:03,595 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 7 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (19), 9 states have call predecessors, (19), 7 states have call successors, (19) Word has length 73 [2022-11-22 02:38:03,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:38:03,595 INFO L225 Difference]: With dead ends: 94 [2022-11-22 02:38:03,595 INFO L226 Difference]: Without dead ends: 92 [2022-11-22 02:38:03,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 187 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=168, Invalid=1164, Unknown=0, NotChecked=0, Total=1332 [2022-11-22 02:38:03,596 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 50 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 81 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-22 02:38:03,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 133 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 366 Invalid, 1 Unknown, 0 Unchecked, 3.4s Time] [2022-11-22 02:38:03,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-11-22 02:38:03,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 88. [2022-11-22 02:38:03,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 57 states have (on average 1.0350877192982457) internal successors, (59), 58 states have internal predecessors, (59), 16 states have call successors, (16), 14 states have call predecessors, (16), 14 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-22 02:38:03,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2022-11-22 02:38:03,619 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 73 [2022-11-22 02:38:03,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:38:03,619 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2022-11-22 02:38:03,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 7 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (19), 9 states have call predecessors, (19), 7 states have call successors, (19) [2022-11-22 02:38:03,620 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2022-11-22 02:38:03,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-22 02:38:03,621 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:38:03,621 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:38:03,634 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e7a5b5-eab7-46ff-a021-7e142d66d0e6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-22 02:38:03,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e7a5b5-eab7-46ff-a021-7e142d66d0e6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:38:03,826 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:38:03,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:38:03,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1678794748, now seen corresponding path program 2 times [2022-11-22 02:38:03,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:38:03,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41828887] [2022-11-22 02:38:03,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:38:03,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:38:03,836 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 02:38:03,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [311400392] [2022-11-22 02:38:03,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 02:38:03,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:38:03,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e7a5b5-eab7-46ff-a021-7e142d66d0e6/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:38:03,837 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e7a5b5-eab7-46ff-a021-7e142d66d0e6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:38:03,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e7a5b5-eab7-46ff-a021-7e142d66d0e6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-22 02:38:03,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-22 02:38:03,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:38:03,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-22 02:38:03,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:38:04,144 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 24 proven. 260 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-11-22 02:38:04,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:38:04,293 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 24 proven. 44 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2022-11-22 02:38:04,293 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:38:04,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41828887] [2022-11-22 02:38:04,293 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 02:38:04,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311400392] [2022-11-22 02:38:04,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311400392] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:38:04,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [918087586] [2022-11-22 02:38:04,297 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2022-11-22 02:38:04,297 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:38:04,298 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:38:04,298 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:38:04,298 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:38:06,263 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 11 for LOIs [2022-11-22 02:38:06,269 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 69 for LOIs [2022-11-22 02:38:06,291 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:38:07,894 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5630#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 02:38:07,894 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:38:07,894 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 02:38:07,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2022-11-22 02:38:07,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991305668] [2022-11-22 02:38:07,895 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 02:38:07,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-22 02:38:07,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:38:07,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-22 02:38:07,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=688, Unknown=0, NotChecked=0, Total=870 [2022-11-22 02:38:07,897 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 11 states have call successors, (29), 7 states have call predecessors, (29), 6 states have return successors, (28), 10 states have call predecessors, (28), 10 states have call successors, (28) [2022-11-22 02:38:08,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:38:08,271 INFO L93 Difference]: Finished difference Result 204 states and 212 transitions. [2022-11-22 02:38:08,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-22 02:38:08,272 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 11 states have call successors, (29), 7 states have call predecessors, (29), 6 states have return successors, (28), 10 states have call predecessors, (28), 10 states have call successors, (28) Word has length 86 [2022-11-22 02:38:08,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:38:08,275 INFO L225 Difference]: With dead ends: 204 [2022-11-22 02:38:08,275 INFO L226 Difference]: Without dead ends: 196 [2022-11-22 02:38:08,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=295, Invalid=1187, Unknown=0, NotChecked=0, Total=1482 [2022-11-22 02:38:08,277 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 77 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:38:08,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 208 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 02:38:08,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-11-22 02:38:08,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2022-11-22 02:38:08,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 129 states have (on average 1.0155038759689923) internal successors, (131), 130 states have internal predecessors, (131), 34 states have call successors, (34), 32 states have call predecessors, (34), 32 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2022-11-22 02:38:08,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 198 transitions. [2022-11-22 02:38:08,329 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 198 transitions. Word has length 86 [2022-11-22 02:38:08,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:38:08,331 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 198 transitions. [2022-11-22 02:38:08,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 11 states have call successors, (29), 7 states have call predecessors, (29), 6 states have return successors, (28), 10 states have call predecessors, (28), 10 states have call successors, (28) [2022-11-22 02:38:08,331 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 198 transitions. [2022-11-22 02:38:08,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-11-22 02:38:08,340 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:38:08,340 INFO L195 NwaCegarLoop]: trace histogram [31, 30, 30, 11, 10, 10, 10, 10, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:38:08,353 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e7a5b5-eab7-46ff-a021-7e142d66d0e6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-22 02:38:08,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e7a5b5-eab7-46ff-a021-7e142d66d0e6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-22 02:38:08,547 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:38:08,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:38:08,547 INFO L85 PathProgramCache]: Analyzing trace with hash -926531660, now seen corresponding path program 3 times [2022-11-22 02:38:08,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:38:08,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517340237] [2022-11-22 02:38:08,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:38:08,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:38:08,560 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 02:38:08,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1503015360] [2022-11-22 02:38:08,560 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 02:38:08,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:38:08,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e7a5b5-eab7-46ff-a021-7e142d66d0e6/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:38:08,561 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e7a5b5-eab7-46ff-a021-7e142d66d0e6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:38:08,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e7a5b5-eab7-46ff-a021-7e142d66d0e6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-22 02:38:08,731 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 02:38:08,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2022-11-22 02:38:08,731 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-22 02:38:08,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-22 02:38:08,906 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-22 02:38:08,906 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-22 02:38:08,907 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-22 02:38:08,922 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e7a5b5-eab7-46ff-a021-7e142d66d0e6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-22 02:38:09,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e7a5b5-eab7-46ff-a021-7e142d66d0e6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-22 02:38:09,119 INFO L444 BasicCegarLoop]: Path program histogram: [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:38:09,123 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-22 02:38:09,193 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 02:38:09 BoogieIcfgContainer [2022-11-22 02:38:09,193 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-22 02:38:09,194 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-22 02:38:09,194 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-22 02:38:09,194 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-22 02:38:09,195 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:37:07" (3/4) ... [2022-11-22 02:38:09,196 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-11-22 02:38:09,305 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e7a5b5-eab7-46ff-a021-7e142d66d0e6/bin/utaipan-g80aRyZoba/witness.graphml [2022-11-22 02:38:09,306 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-22 02:38:09,307 INFO L158 Benchmark]: Toolchain (without parser) took 62864.80ms. Allocated memory was 132.1MB in the beginning and 362.8MB in the end (delta: 230.7MB). Free memory was 68.1MB in the beginning and 299.8MB in the end (delta: -231.7MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-22 02:38:09,307 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 132.1MB. Free memory was 107.5MB in the beginning and 107.3MB in the end (delta: 167.9kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-22 02:38:09,308 INFO L158 Benchmark]: CACSL2BoogieTranslator took 262.75ms. Allocated memory was 132.1MB in the beginning and 174.1MB in the end (delta: 41.9MB). Free memory was 67.7MB in the beginning and 141.1MB in the end (delta: -73.4MB). Peak memory consumption was 9.8MB. Max. memory is 16.1GB. [2022-11-22 02:38:09,308 INFO L158 Benchmark]: Boogie Procedure Inliner took 29.41ms. Allocated memory is still 174.1MB. Free memory was 141.1MB in the beginning and 139.8MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-22 02:38:09,308 INFO L158 Benchmark]: Boogie Preprocessor took 21.18ms. Allocated memory is still 174.1MB. Free memory was 139.8MB in the beginning and 139.0MB in the end (delta: 822.8kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-22 02:38:09,309 INFO L158 Benchmark]: RCFGBuilder took 389.76ms. Allocated memory is still 174.1MB. Free memory was 139.0MB in the beginning and 125.2MB in the end (delta: 13.9MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-11-22 02:38:09,309 INFO L158 Benchmark]: TraceAbstraction took 62040.17ms. Allocated memory was 174.1MB in the beginning and 362.8MB in the end (delta: 188.7MB). Free memory was 124.4MB in the beginning and 308.2MB in the end (delta: -183.8MB). Peak memory consumption was 6.5MB. Max. memory is 16.1GB. [2022-11-22 02:38:09,310 INFO L158 Benchmark]: Witness Printer took 111.93ms. Allocated memory is still 362.8MB. Free memory was 307.1MB in the beginning and 299.8MB in the end (delta: 7.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-11-22 02:38:09,317 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 132.1MB. Free memory was 107.5MB in the beginning and 107.3MB in the end (delta: 167.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 262.75ms. Allocated memory was 132.1MB in the beginning and 174.1MB in the end (delta: 41.9MB). Free memory was 67.7MB in the beginning and 141.1MB in the end (delta: -73.4MB). Peak memory consumption was 9.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 29.41ms. Allocated memory is still 174.1MB. Free memory was 141.1MB in the beginning and 139.8MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 21.18ms. Allocated memory is still 174.1MB. Free memory was 139.8MB in the beginning and 139.0MB in the end (delta: 822.8kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 389.76ms. Allocated memory is still 174.1MB. Free memory was 139.0MB in the beginning and 125.2MB in the end (delta: 13.9MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 62040.17ms. Allocated memory was 174.1MB in the beginning and 362.8MB in the end (delta: 188.7MB). Free memory was 124.4MB in the beginning and 308.2MB in the end (delta: -183.8MB). Peak memory consumption was 6.5MB. Max. memory is 16.1GB. * Witness Printer took 111.93ms. Allocated memory is still 362.8MB. Free memory was 307.1MB in the beginning and 299.8MB in the end (delta: 7.3MB). Peak memory consumption was 6.3MB. 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: 13]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L18] int counter = 0; [L20] long long a, b, p, q, r, s; [L21] int x, y; [L22] x = __VERIFIER_nondet_int() [L23] y = __VERIFIER_nondet_int() [L24] CALL assume_abort_if_not(x >= 1) VAL [\old(cond)=1, counter=0] [L8] COND FALSE !(!cond) [L24] RET assume_abort_if_not(x >= 1) VAL [counter=0, x=72, y=17] [L25] CALL assume_abort_if_not(y >= 1) VAL [\old(cond)=1, counter=0] [L8] COND FALSE !(!cond) [L25] RET assume_abort_if_not(y >= 1) VAL [counter=0, x=72, y=17] [L27] a = x [L28] b = y [L29] p = 1 [L30] q = 0 [L31] r = 0 [L32] s = 1 VAL [a=72, b=17, counter=0, p=1, q=0, r=0, s=1, x=72, y=17] [L34] EXPR counter++ VAL [a=72, b=17, counter=1, counter++=0, p=1, q=0, r=0, s=1, x=72, y=17] [L34] COND TRUE counter++<10 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, counter=1] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [a=72, b=17, counter=1, p=1, q=0, r=0, s=1, x=72, y=17] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=1] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=72, b=17, counter=1, p=1, q=0, r=0, s=1, x=72, y=17] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=1] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=72, b=17, counter=1, p=1, q=0, r=0, s=1, x=72, y=17] [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s VAL [a=55, b=17, counter=1, p=1, q=0, r=-1, s=1, x=72, y=17] [L34] EXPR counter++ VAL [a=55, b=17, counter=2, counter++=1, p=1, q=0, r=-1, s=1, x=72, y=17] [L34] COND TRUE counter++<10 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, counter=2] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [a=55, b=17, counter=2, p=1, q=0, r=-1, s=1, x=72, y=17] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=2] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=55, b=17, counter=2, p=1, q=0, r=-1, s=1, x=72, y=17] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=2] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=55, b=17, counter=2, p=1, q=0, r=-1, s=1, x=72, y=17] [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s VAL [a=38, b=17, counter=2, p=1, q=0, r=-2, s=1, x=72, y=17] [L34] EXPR counter++ VAL [a=38, b=17, counter=3, counter++=2, p=1, q=0, r=-2, s=1, x=72, y=17] [L34] COND TRUE counter++<10 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, counter=3] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=3] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [a=38, b=17, counter=3, p=1, q=0, r=-2, s=1, x=72, y=17] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=3] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=3] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=38, b=17, counter=3, p=1, q=0, r=-2, s=1, x=72, y=17] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=3] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=3] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=38, b=17, counter=3, p=1, q=0, r=-2, s=1, x=72, y=17] [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s VAL [a=21, b=17, counter=3, p=1, q=0, r=-3, s=1, x=72, y=17] [L34] EXPR counter++ VAL [a=21, b=17, counter=4, counter++=3, p=1, q=0, r=-3, s=1, x=72, y=17] [L34] COND TRUE counter++<10 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, counter=4] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=4] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [a=21, b=17, counter=4, p=1, q=0, r=-3, s=1, x=72, y=17] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=4] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=4] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=21, b=17, counter=4, p=1, q=0, r=-3, s=1, x=72, y=17] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=4] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=4] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=21, b=17, counter=4, p=1, q=0, r=-3, s=1, x=72, y=17] [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s VAL [a=4, b=17, counter=4, p=1, q=0, r=-4, s=1, x=72, y=17] [L34] EXPR counter++ VAL [a=4, b=17, counter=5, counter++=4, p=1, q=0, r=-4, s=1, x=72, y=17] [L34] COND TRUE counter++<10 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [a=4, b=17, counter=5, p=1, q=0, r=-4, s=1, x=72, y=17] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=4, b=17, counter=5, p=1, q=0, r=-4, s=1, x=72, y=17] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=4, b=17, counter=5, p=1, q=0, r=-4, s=1, x=72, y=17] [L39] COND FALSE !(!(a != b)) [L42] COND FALSE !(a > b) [L47] b = b - a [L48] q = q - p [L49] s = s - r VAL [a=4, b=13, counter=5, p=1, q=-1, r=-4, s=5, x=72, y=17] [L34] EXPR counter++ VAL [a=4, b=13, counter=6, counter++=5, p=1, q=-1, r=-4, s=5, x=72, y=17] [L34] COND TRUE counter++<10 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, counter=6] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=6] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [a=4, b=13, counter=6, p=1, q=-1, r=-4, s=5, x=72, y=17] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=6] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=6] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=4, b=13, counter=6, p=1, q=-1, r=-4, s=5, x=72, y=17] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=6] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=6] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=4, b=13, counter=6, p=1, q=-1, r=-4, s=5, x=72, y=17] [L39] COND FALSE !(!(a != b)) [L42] COND FALSE !(a > b) [L47] b = b - a [L48] q = q - p [L49] s = s - r VAL [a=4, b=9, counter=6, p=1, q=-2, r=-4, s=9, x=72, y=17] [L34] EXPR counter++ VAL [a=4, b=9, counter=7, counter++=6, p=1, q=-2, r=-4, s=9, x=72, y=17] [L34] COND TRUE counter++<10 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, counter=7] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=7] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [a=4, b=9, counter=7, p=1, q=-2, r=-4, s=9, x=72, y=17] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=7] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=7] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=4, b=9, counter=7, p=1, q=-2, r=-4, s=9, x=72, y=17] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=7] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=7] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=4, b=9, counter=7, p=1, q=-2, r=-4, s=9, x=72, y=17] [L39] COND FALSE !(!(a != b)) [L42] COND FALSE !(a > b) [L47] b = b - a [L48] q = q - p [L49] s = s - r VAL [a=4, b=5, counter=7, p=1, q=-3, r=-4, s=13, x=72, y=17] [L34] EXPR counter++ VAL [a=4, b=5, counter=8, counter++=7, p=1, q=-3, r=-4, s=13, x=72, y=17] [L34] COND TRUE counter++<10 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, counter=8] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=8] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [a=4, b=5, counter=8, p=1, q=-3, r=-4, s=13, x=72, y=17] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=8] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=8] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=4, b=5, counter=8, p=1, q=-3, r=-4, s=13, x=72, y=17] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=8] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=8] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=4, b=5, counter=8, p=1, q=-3, r=-4, s=13, x=72, y=17] [L39] COND FALSE !(!(a != b)) [L42] COND FALSE !(a > b) [L47] b = b - a [L48] q = q - p [L49] s = s - r VAL [a=4, b=1, counter=8, p=1, q=-4, r=-4, s=17, x=72, y=17] [L34] EXPR counter++ VAL [a=4, b=1, counter=9, counter++=8, p=1, q=-4, r=-4, s=17, x=72, y=17] [L34] COND TRUE counter++<10 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, counter=9] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=9] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [a=4, b=1, counter=9, p=1, q=-4, r=-4, s=17, x=72, y=17] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=9] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=9] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=4, b=1, counter=9, p=1, q=-4, r=-4, s=17, x=72, y=17] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=9] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=9] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=4, b=1, counter=9, p=1, q=-4, r=-4, s=17, x=72, y=17] [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s VAL [a=3, b=1, counter=9, p=5, q=-4, r=-21, s=17, x=72, y=17] [L34] EXPR counter++ VAL [a=3, b=1, counter=10, counter++=9, p=5, q=-4, r=-21, s=17, x=72, y=17] [L34] COND TRUE counter++<10 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, counter=10] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=10] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [a=3, b=1, counter=10, p=5, q=-4, r=-21, s=17, x=72, y=17] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=10] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=10] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=3, b=1, counter=10, p=5, q=-4, r=-21, s=17, x=72, y=17] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=10] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=10] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=3, b=1, counter=10, p=5, q=-4, r=-21, s=17, x=72, y=17] [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s VAL [a=2, b=1, counter=10, p=9, q=-4, r=-38, s=17, x=72, y=17] [L34] EXPR counter++ VAL [a=2, b=1, counter=11, counter++=10, p=9, q=-4, r=-38, s=17, x=72, y=17] [L34] COND FALSE !(counter++<10) [L53] CALL __VERIFIER_assert(a - b == 0) VAL [\old(cond)=0, counter=11] [L11] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, counter=11] [L13] reach_error() VAL [\old(cond)=0, cond=0, counter=11] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 61.9s, OverallIterations: 15, TraceHistogramMax: 31, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.1s, AutomataDifference: 11.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 394 SdHoareTripleChecker+Valid, 6.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 353 mSDsluCounter, 1494 SdHoareTripleChecker+Invalid, 6.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1096 mSDsCounter, 358 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1915 IncrementalHoareTripleChecker+Invalid, 2274 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 358 mSolverCounterUnsat, 398 mSDtfsCounter, 1915 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1282 GetRequests, 996 SyntacticMatches, 25 SemanticMatches, 261 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2403 ImplicationChecksByTransitivity, 29.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=196occurred in iteration=14, InterpolantAutomatonStates: 136, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 14 MinimizatonAttempts, 27 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 7.6s InterpolantComputationTime, 698 NumberOfCodeBlocks, 677 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 872 ConstructedInterpolants, 0 QuantifiedInterpolants, 5516 SizeOfPredicates, 57 NumberOfNonLiveVariables, 1387 ConjunctsInSsa, 245 ConjunctsInUnsatCore, 22 InterpolantComputations, 6 PerfectInterpolantSequences, 1304/1732 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: 1.2s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 6, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 41, DAG_INTERPRETER_EARLY_EXITS: 2, TOOLS_POST_APPLICATIONS: 27, TOOLS_POST_TIME: 0.1s, TOOLS_POST_CALL_APPLICATIONS: 32, TOOLS_POST_CALL_TIME: 0.5s, TOOLS_POST_RETURN_APPLICATIONS: 20, TOOLS_POST_RETURN_TIME: 0.1s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 79, TOOLS_QUANTIFIERELIM_TIME: 0.7s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.1s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 106, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 38, DOMAIN_JOIN_TIME: 0.3s, 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: 41, DOMAIN_ISBOTTOM_TIME: 0.1s, 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: 20, CALL_SUMMARIZER_CACHE_MISSES: 4, 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: 408, DAG_COMPRESSION_RETAINED_NODES: 114, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-11-22 02:38:09,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2e7a5b5-eab7-46ff-a021-7e142d66d0e6/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE