./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursified_nla-digbench/recursified_sqrt1-ll.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 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_b7c7597e-9820-4c47-99f3-f94e9d0d30f6/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c7597e-9820-4c47-99f3-f94e9d0d30f6/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c7597e-9820-4c47-99f3-f94e9d0d30f6/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c7597e-9820-4c47-99f3-f94e9d0d30f6/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursified_nla-digbench/recursified_sqrt1-ll.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c7597e-9820-4c47-99f3-f94e9d0d30f6/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c7597e-9820-4c47-99f3-f94e9d0d30f6/bin/utaipan-verify-mE87zJ7Ire --witnessprinter.witness.filename witness --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 ac02a57e98f6481647f49b84c91fda6d0505e35fbffb37ed6b508f20e911a1af --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:31:43,540 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:31:43,669 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c7597e-9820-4c47-99f3-f94e9d0d30f6/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-23 21:31:43,677 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:31:43,678 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:31:43,717 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:31:43,718 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:31:43,719 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:31:43,720 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:31:43,725 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:31:43,725 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:31:43,727 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:31:43,727 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:31:43,727 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:31:43,728 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:31:43,728 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:31:43,729 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:31:43,729 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:31:43,729 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:31:43,730 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:31:43,730 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:31:43,730 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:31:43,731 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:31:43,732 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:31:43,733 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 21:31:43,733 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:31:43,733 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 21:31:43,734 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:31:43,734 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:31:43,735 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:31:43,736 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:31:43,736 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 21:31:43,737 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:31:43,737 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:31:43,737 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:31:43,738 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:31:43,738 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:31:43,738 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:31:43,738 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:31:43,739 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:31:43,739 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:31:43,739 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:31:43,740 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:31:43,740 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:31:43,741 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:31:43,741 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:31:43,741 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:31:43,741 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_b7c7597e-9820-4c47-99f3-f94e9d0d30f6/bin/utaipan-verify-mE87zJ7Ire/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c7597e-9820-4c47-99f3-f94e9d0d30f6/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ac02a57e98f6481647f49b84c91fda6d0505e35fbffb37ed6b508f20e911a1af [2023-11-23 21:31:44,052 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:31:44,088 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:31:44,090 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:31:44,093 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:31:44,094 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:31:44,095 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c7597e-9820-4c47-99f3-f94e9d0d30f6/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/recursified_nla-digbench/recursified_sqrt1-ll.c [2023-11-23 21:31:47,252 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:31:47,557 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:31:47,558 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c7597e-9820-4c47-99f3-f94e9d0d30f6/sv-benchmarks/c/recursified_nla-digbench/recursified_sqrt1-ll.c [2023-11-23 21:31:47,566 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c7597e-9820-4c47-99f3-f94e9d0d30f6/bin/utaipan-verify-mE87zJ7Ire/data/6628154c6/a174d67a861f4d63a84338a16b922c1d/FLAG4f9d52ff5 [2023-11-23 21:31:47,583 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c7597e-9820-4c47-99f3-f94e9d0d30f6/bin/utaipan-verify-mE87zJ7Ire/data/6628154c6/a174d67a861f4d63a84338a16b922c1d [2023-11-23 21:31:47,589 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:31:47,591 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:31:47,595 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:31:47,595 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:31:47,601 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:31:47,601 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:31:47" (1/1) ... [2023-11-23 21:31:47,602 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b7222bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:47, skipping insertion in model container [2023-11-23 21:31:47,603 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:31:47" (1/1) ... [2023-11-23 21:31:47,631 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:31:47,787 WARN L240 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_b7c7597e-9820-4c47-99f3-f94e9d0d30f6/sv-benchmarks/c/recursified_nla-digbench/recursified_sqrt1-ll.c[1052,1065] [2023-11-23 21:31:47,804 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:31:47,814 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:31:47,828 WARN L240 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_b7c7597e-9820-4c47-99f3-f94e9d0d30f6/sv-benchmarks/c/recursified_nla-digbench/recursified_sqrt1-ll.c[1052,1065] [2023-11-23 21:31:47,845 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:31:47,860 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:31:47,860 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:47 WrapperNode [2023-11-23 21:31:47,861 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:31:47,861 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:31:47,862 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:31:47,862 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:31:47,870 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:47" (1/1) ... [2023-11-23 21:31:47,892 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:47" (1/1) ... [2023-11-23 21:31:47,909 INFO L138 Inliner]: procedures = 16, calls = 58, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 60 [2023-11-23 21:31:47,909 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:31:47,910 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:31:47,910 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:31:47,910 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:31:47,918 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:47" (1/1) ... [2023-11-23 21:31:47,919 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:47" (1/1) ... [2023-11-23 21:31:47,921 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:47" (1/1) ... [2023-11-23 21:31:47,921 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:47" (1/1) ... [2023-11-23 21:31:47,928 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:47" (1/1) ... [2023-11-23 21:31:47,930 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:47" (1/1) ... [2023-11-23 21:31:47,931 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:47" (1/1) ... [2023-11-23 21:31:47,933 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:47" (1/1) ... [2023-11-23 21:31:47,935 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:31:47,938 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:31:47,939 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:31:47,940 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:31:47,941 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:47" (1/1) ... [2023-11-23 21:31:47,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:31:47,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c7597e-9820-4c47-99f3-f94e9d0d30f6/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:31:47,976 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c7597e-9820-4c47-99f3-f94e9d0d30f6/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:31:47,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c7597e-9820-4c47-99f3-f94e9d0d30f6/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:31:48,018 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:31:48,019 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:31:48,019 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 21:31:48,019 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 21:31:48,019 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_29_to_40_0 [2023-11-23 21:31:48,019 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_29_to_40_0 [2023-11-23 21:31:48,020 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:31:48,020 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:31:48,020 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 21:31:48,020 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-23 21:31:48,020 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-23 21:31:48,021 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 21:31:48,098 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:31:48,101 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:31:48,327 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:31:48,359 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:31:48,359 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-23 21:31:48,360 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:31:48 BoogieIcfgContainer [2023-11-23 21:31:48,361 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:31:48,366 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:31:48,366 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:31:48,370 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:31:48,370 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:31:47" (1/3) ... [2023-11-23 21:31:48,371 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@574f1539 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:31:48, skipping insertion in model container [2023-11-23 21:31:48,371 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:47" (2/3) ... [2023-11-23 21:31:48,371 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@574f1539 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:31:48, skipping insertion in model container [2023-11-23 21:31:48,371 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:31:48" (3/3) ... [2023-11-23 21:31:48,373 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_sqrt1-ll.c [2023-11-23 21:31:48,400 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:31:48,400 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 21:31:48,446 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:31:48,453 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=LoopHeads, 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;@28d824d4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:31:48,453 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 21:31:48,457 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 16 states have (on average 1.25) internal successors, (20), 18 states have internal predecessors, (20), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-23 21:31:48,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-23 21:31:48,464 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:31:48,465 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:31:48,465 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:31:48,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:31:48,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1408384077, now seen corresponding path program 1 times [2023-11-23 21:31:48,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:31:48,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210657308] [2023-11-23 21:31:48,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:48,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:31:48,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:49,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:31:49,732 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:31:49,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210657308] [2023-11-23 21:31:49,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210657308] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:31:49,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:31:49,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-23 21:31:49,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017161932] [2023-11-23 21:31:49,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:31:49,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 21:31:49,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:31:49,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 21:31:49,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-23 21:31:49,796 INFO L87 Difference]: Start difference. First operand has 28 states, 16 states have (on average 1.25) internal successors, (20), 18 states have internal predecessors, (20), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 8 states, 6 states have (on average 1.0) internal successors, (6), 5 states have internal predecessors, (6), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:31:50,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:31:50,167 INFO L93 Difference]: Finished difference Result 76 states and 113 transitions. [2023-11-23 21:31:50,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-23 21:31:50,170 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.0) internal successors, (6), 5 states have internal predecessors, (6), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-23 21:31:50,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:31:50,178 INFO L225 Difference]: With dead ends: 76 [2023-11-23 21:31:50,178 INFO L226 Difference]: Without dead ends: 47 [2023-11-23 21:31:50,182 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-11-23 21:31:50,186 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 22 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:31:50,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 99 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:31:50,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-11-23 21:31:50,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2023-11-23 21:31:50,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 25 states have (on average 1.12) internal successors, (28), 27 states have internal predecessors, (28), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2023-11-23 21:31:50,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions. [2023-11-23 21:31:50,240 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 8 [2023-11-23 21:31:50,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:31:50,240 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions. [2023-11-23 21:31:50,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.0) internal successors, (6), 5 states have internal predecessors, (6), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:31:50,241 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions. [2023-11-23 21:31:50,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-23 21:31:50,242 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:31:50,242 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:31:50,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:31:50,243 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:31:50,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:31:50,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1735781632, now seen corresponding path program 1 times [2023-11-23 21:31:50,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:31:50,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512189994] [2023-11-23 21:31:50,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:50,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:31:50,271 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:31:50,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1414134851] [2023-11-23 21:31:50,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:50,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:31:50,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c7597e-9820-4c47-99f3-f94e9d0d30f6/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:31:50,274 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c7597e-9820-4c47-99f3-f94e9d0d30f6/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:31:50,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c7597e-9820-4c47-99f3-f94e9d0d30f6/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 21:31:50,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:50,418 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-23 21:31:50,428 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:31:50,538 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 55 [2023-11-23 21:31:50,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:50,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:50,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:50,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:50,567 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 82 [2023-11-23 21:31:50,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:50,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:50,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:50,589 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 67 [2023-11-23 21:31:50,615 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 88 [2023-11-23 21:31:50,630 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-23 21:31:50,660 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-23 21:31:50,661 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 76 treesize of output 70 [2023-11-23 21:31:50,695 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-23 21:31:50,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:50,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:50,949 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 28 [2023-11-23 21:31:50,955 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-23 21:31:51,254 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:31:51,254 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:31:51,414 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:31:51,414 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:31:51,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512189994] [2023-11-23 21:31:51,415 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:31:51,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414134851] [2023-11-23 21:31:51,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414134851] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-23 21:31:51,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:31:51,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2023-11-23 21:31:51,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488492130] [2023-11-23 21:31:51,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:31:51,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 21:31:51,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:31:51,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 21:31:51,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2023-11-23 21:31:51,419 INFO L87 Difference]: Start difference. First operand 41 states and 50 transitions. Second operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 21:31:51,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:31:51,944 INFO L93 Difference]: Finished difference Result 53 states and 63 transitions. [2023-11-23 21:31:51,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 21:31:51,945 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2023-11-23 21:31:51,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:31:51,946 INFO L225 Difference]: With dead ends: 53 [2023-11-23 21:31:51,947 INFO L226 Difference]: Without dead ends: 51 [2023-11-23 21:31:51,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2023-11-23 21:31:51,948 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 20 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:31:51,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 110 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 21:31:51,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-11-23 21:31:51,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2023-11-23 21:31:51,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 30 states have internal predecessors, (31), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2023-11-23 21:31:51,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2023-11-23 21:31:51,964 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 14 [2023-11-23 21:31:51,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:31:51,965 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2023-11-23 21:31:51,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 21:31:51,965 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2023-11-23 21:31:51,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-23 21:31:51,966 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:31:51,966 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:31:51,988 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c7597e-9820-4c47-99f3-f94e9d0d30f6/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-23 21:31:52,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c7597e-9820-4c47-99f3-f94e9d0d30f6/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:31:52,188 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:31:52,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:31:52,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1054740085, now seen corresponding path program 1 times [2023-11-23 21:31:52,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:31:52,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275144443] [2023-11-23 21:31:52,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:52,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:31:52,220 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:31:52,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [464853558] [2023-11-23 21:31:52,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:52,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:31:52,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c7597e-9820-4c47-99f3-f94e9d0d30f6/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:31:52,224 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c7597e-9820-4c47-99f3-f94e9d0d30f6/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:31:52,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c7597e-9820-4c47-99f3-f94e9d0d30f6/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 21:31:52,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:52,321 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-23 21:31:52,332 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:31:52,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:52,380 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 114 [2023-11-23 21:31:52,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:52,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:52,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:52,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:52,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:52,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:52,427 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 25 [2023-11-23 21:31:52,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:52,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:52,441 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-23 21:31:52,451 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-23 21:31:52,460 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-23 21:31:52,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:52,477 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 104 [2023-11-23 21:31:52,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:52,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:52,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:52,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:52,511 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 25 [2023-11-23 21:31:52,517 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-23 21:31:52,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:52,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:52,541 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 1 [2023-11-23 21:31:52,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:52,550 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2023-11-23 21:31:52,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:52,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:52,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:52,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:52,566 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 17 [2023-11-23 21:31:52,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:52,575 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-23 21:31:52,584 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-23 21:31:52,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:52,593 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-23 21:31:52,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:52,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:52,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:52,607 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 55 [2023-11-23 21:31:52,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:52,617 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 21:31:52,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:52,629 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 51 [2023-11-23 21:31:52,641 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2023-11-23 21:31:52,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:52,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:52,658 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 17 [2023-11-23 21:31:52,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:52,667 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-23 21:31:52,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:52,703 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-23 21:31:52,709 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-23 21:31:52,716 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2023-11-23 21:31:52,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:52,724 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2023-11-23 21:31:52,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:52,732 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-23 21:31:52,749 INFO L349 Elim1Store]: treesize reduction 31, result has 8.8 percent of original size [2023-11-23 21:31:52,750 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 41 [2023-11-23 21:31:52,756 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 19 [2023-11-23 21:31:52,759 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 21:31:52,762 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 21:31:52,763 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 17 [2023-11-23 21:31:52,779 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-23 21:31:52,779 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 18 [2023-11-23 21:31:52,789 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 21:31:52,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:52,802 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 98 [2023-11-23 21:31:52,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:52,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:52,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:52,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:52,829 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 25 [2023-11-23 21:31:52,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:52,843 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-23 21:31:52,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:52,852 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-23 21:31:52,885 INFO L349 Elim1Store]: treesize reduction 66, result has 4.3 percent of original size [2023-11-23 21:31:52,885 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 82 treesize of output 133 [2023-11-23 21:31:52,921 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2023-11-23 21:31:52,951 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 21:31:52,964 INFO L349 Elim1Store]: treesize reduction 53, result has 1.9 percent of original size [2023-11-23 21:31:52,965 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 102 treesize of output 124 [2023-11-23 21:31:52,990 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-23 21:31:52,990 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 64 [2023-11-23 21:31:53,012 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 39 [2023-11-23 21:31:53,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:53,045 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 32 [2023-11-23 21:31:53,100 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 21:31:53,491 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 21:31:53,491 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:31:53,757 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 21:31:53,757 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:31:53,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275144443] [2023-11-23 21:31:53,757 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:31:53,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464853558] [2023-11-23 21:31:53,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464853558] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-23 21:31:53,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:31:53,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 17 [2023-11-23 21:31:53,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986319683] [2023-11-23 21:31:53,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:31:53,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 21:31:53,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:31:53,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 21:31:53,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2023-11-23 21:31:53,760 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 21:31:55,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:31:55,493 INFO L93 Difference]: Finished difference Result 57 states and 66 transitions. [2023-11-23 21:31:55,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-23 21:31:55,496 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2023-11-23 21:31:55,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:31:55,497 INFO L225 Difference]: With dead ends: 57 [2023-11-23 21:31:55,498 INFO L226 Difference]: Without dead ends: 55 [2023-11-23 21:31:55,498 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2023-11-23 21:31:55,500 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-23 21:31:55,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 109 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-23 21:31:55,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-11-23 21:31:55,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 49. [2023-11-23 21:31:55,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 31 states have (on average 1.096774193548387) internal successors, (34), 33 states have internal predecessors, (34), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2023-11-23 21:31:55,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2023-11-23 21:31:55,523 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 20 [2023-11-23 21:31:55,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:31:55,525 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2023-11-23 21:31:55,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 21:31:55,527 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2023-11-23 21:31:55,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-23 21:31:55,530 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:31:55,530 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:31:55,566 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c7597e-9820-4c47-99f3-f94e9d0d30f6/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 21:31:55,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c7597e-9820-4c47-99f3-f94e9d0d30f6/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:31:55,745 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:31:55,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:31:55,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1398908834, now seen corresponding path program 1 times [2023-11-23 21:31:55,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:31:55,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740197080] [2023-11-23 21:31:55,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:55,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:31:55,773 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:31:55,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1570104471] [2023-11-23 21:31:55,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:55,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:31:55,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c7597e-9820-4c47-99f3-f94e9d0d30f6/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:31:55,776 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c7597e-9820-4c47-99f3-f94e9d0d30f6/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:31:55,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c7597e-9820-4c47-99f3-f94e9d0d30f6/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 21:31:55,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:55,907 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 77 conjunts are in the unsatisfiable core [2023-11-23 21:31:55,914 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:31:55,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:55,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:55,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:55,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:55,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:31:56,028 INFO L349 Elim1Store]: treesize reduction 92, result has 25.2 percent of original size [2023-11-23 21:31:56,029 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 56 treesize of output 114 [2023-11-23 21:31:56,069 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-23 21:31:56,070 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 384 treesize of output 372 [2023-11-23 21:31:56,100 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2023-11-23 21:31:56,226 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2023-11-23 21:31:56,269 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2023-11-23 21:31:56,287 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 21:31:56,288 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2023-11-23 21:31:56,373 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-23 21:32:03,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:03,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:03,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:03,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:03,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:03,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:03,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:03,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:03,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:03,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:03,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:05,383 INFO L349 Elim1Store]: treesize reduction 881, result has 19.2 percent of original size [2023-11-23 21:32:05,384 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 15 select indices, 15 select index equivalence classes, 11 disjoint index pairs (out of 105 index pairs), introduced 17 new quantified variables, introduced 107 case distinctions, treesize of input 361 treesize of output 463 [2023-11-23 21:32:05,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:05,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:05,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:05,626 INFO L224 Elim1Store]: Index analysis took 130 ms [2023-11-23 21:32:06,806 INFO L349 Elim1Store]: treesize reduction 1099, result has 16.0 percent of original size [2023-11-23 21:32:06,807 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 14 select indices, 14 select index equivalence classes, 14 disjoint index pairs (out of 91 index pairs), introduced 16 new quantified variables, introduced 105 case distinctions, treesize of input 202 treesize of output 385 [2023-11-23 21:32:07,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:07,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:07,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:07,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:32:07,252 INFO L224 Elim1Store]: Index analysis took 144 ms [2023-11-23 21:32:09,737 INFO L349 Elim1Store]: treesize reduction 820, result has 41.6 percent of original size [2023-11-23 21:32:09,738 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 14 select indices, 14 select index equivalence classes, 15 disjoint index pairs (out of 91 index pairs), introduced 16 new quantified variables, introduced 102 case distinctions, treesize of input 302 treesize of output 892 [2023-11-23 21:32:10,376 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5