./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/freire2_valuebound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc 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_25eb2c4d-c64e-410d-a43b-46e3b11fdb5a/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25eb2c4d-c64e-410d-a43b-46e3b11fdb5a/bin/utaipan-verify-SwPr7d2a91/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25eb2c4d-c64e-410d-a43b-46e3b11fdb5a/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25eb2c4d-c64e-410d-a43b-46e3b11fdb5a/bin/utaipan-verify-SwPr7d2a91/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/freire2_valuebound50.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25eb2c4d-c64e-410d-a43b-46e3b11fdb5a/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25eb2c4d-c64e-410d-a43b-46e3b11fdb5a/bin/utaipan-verify-SwPr7d2a91 --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 acf998c27a5d4b83a2feddb35e0896b9221e58140057280398a3180f484cbd82 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 23:14:20,595 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 23:14:20,732 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25eb2c4d-c64e-410d-a43b-46e3b11fdb5a/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-24 23:14:20,739 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 23:14:20,740 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 23:14:20,786 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 23:14:20,787 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 23:14:20,787 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 23:14:20,789 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 23:14:20,794 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 23:14:20,794 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-24 23:14:20,796 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-24 23:14:20,796 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-24 23:14:20,798 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-24 23:14:20,799 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-24 23:14:20,799 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-24 23:14:20,800 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-24 23:14:20,800 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-24 23:14:20,801 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-24 23:14:20,801 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-24 23:14:20,802 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-24 23:14:20,802 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-24 23:14:20,804 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 23:14:20,804 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 23:14:20,805 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 23:14:20,805 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 23:14:20,806 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 23:14:20,806 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 23:14:20,806 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 23:14:20,807 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 23:14:20,808 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 23:14:20,809 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 23:14:20,809 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 23:14:20,809 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 23:14:20,810 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 23:14:20,810 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 23:14:20,811 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 23:14:20,811 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:14:20,811 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 23:14:20,812 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 23:14:20,812 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 23:14:20,813 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-24 23:14:20,813 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 23:14:20,813 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 23:14:20,814 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 23:14:20,814 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-24 23:14:20,814 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 23:14:20,814 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_25eb2c4d-c64e-410d-a43b-46e3b11fdb5a/bin/utaipan-verify-SwPr7d2a91/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25eb2c4d-c64e-410d-a43b-46e3b11fdb5a/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> acf998c27a5d4b83a2feddb35e0896b9221e58140057280398a3180f484cbd82 [2023-11-24 23:14:21,137 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 23:14:21,170 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 23:14:21,173 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 23:14:21,176 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 23:14:21,176 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 23:14:21,178 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25eb2c4d-c64e-410d-a43b-46e3b11fdb5a/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/nla-digbench-scaling/freire2_valuebound50.c [2023-11-24 23:14:24,378 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 23:14:24,666 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 23:14:24,666 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25eb2c4d-c64e-410d-a43b-46e3b11fdb5a/sv-benchmarks/c/nla-digbench-scaling/freire2_valuebound50.c [2023-11-24 23:14:24,676 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25eb2c4d-c64e-410d-a43b-46e3b11fdb5a/bin/utaipan-verify-SwPr7d2a91/data/e3b08a011/02396fc894594200bda720e92d219687/FLAGb1d41d3a1 [2023-11-24 23:14:24,693 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25eb2c4d-c64e-410d-a43b-46e3b11fdb5a/bin/utaipan-verify-SwPr7d2a91/data/e3b08a011/02396fc894594200bda720e92d219687 [2023-11-24 23:14:24,699 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 23:14:24,702 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 23:14:24,706 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 23:14:24,706 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 23:14:24,712 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 23:14:24,712 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:14:24" (1/1) ... [2023-11-24 23:14:24,714 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34f86a10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:14:24, skipping insertion in model container [2023-11-24 23:14:24,714 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:14:24" (1/1) ... [2023-11-24 23:14:24,743 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 23:14:24,919 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_25eb2c4d-c64e-410d-a43b-46e3b11fdb5a/sv-benchmarks/c/nla-digbench-scaling/freire2_valuebound50.c[709,722] [2023-11-24 23:14:24,946 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:14:24,958 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 23:14:24,970 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_25eb2c4d-c64e-410d-a43b-46e3b11fdb5a/sv-benchmarks/c/nla-digbench-scaling/freire2_valuebound50.c[709,722] [2023-11-24 23:14:24,981 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:14:24,997 INFO L206 MainTranslator]: Completed translation [2023-11-24 23:14:24,997 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:14:24 WrapperNode [2023-11-24 23:14:24,998 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 23:14:24,999 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 23:14:24,999 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 23:14:24,999 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 23:14:25,008 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:14:24" (1/1) ... [2023-11-24 23:14:25,023 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:14:24" (1/1) ... [2023-11-24 23:14:25,054 INFO L138 Inliner]: procedures = 14, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 40 [2023-11-24 23:14:25,055 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 23:14:25,056 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 23:14:25,056 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 23:14:25,056 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 23:14:25,066 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:14:24" (1/1) ... [2023-11-24 23:14:25,066 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:14:24" (1/1) ... [2023-11-24 23:14:25,068 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:14:24" (1/1) ... [2023-11-24 23:14:25,068 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:14:24" (1/1) ... [2023-11-24 23:14:25,073 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:14:24" (1/1) ... [2023-11-24 23:14:25,077 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:14:24" (1/1) ... [2023-11-24 23:14:25,078 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:14:24" (1/1) ... [2023-11-24 23:14:25,079 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:14:24" (1/1) ... [2023-11-24 23:14:25,081 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 23:14:25,082 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 23:14:25,082 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 23:14:25,083 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 23:14:25,084 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:14:24" (1/1) ... [2023-11-24 23:14:25,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:14:25,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25eb2c4d-c64e-410d-a43b-46e3b11fdb5a/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:14:25,120 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25eb2c4d-c64e-410d-a43b-46e3b11fdb5a/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-24 23:14:25,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25eb2c4d-c64e-410d-a43b-46e3b11fdb5a/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-24 23:14:25,167 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 23:14:25,167 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-24 23:14:25,167 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 23:14:25,167 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 23:14:25,168 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-24 23:14:25,168 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-24 23:14:25,246 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 23:14:25,249 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 23:14:25,400 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 23:14:25,441 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 23:14:25,441 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-24 23:14:25,443 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:14:25 BoogieIcfgContainer [2023-11-24 23:14:25,443 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 23:14:25,446 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 23:14:25,447 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 23:14:25,450 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 23:14:25,450 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 11:14:24" (1/3) ... [2023-11-24 23:14:25,451 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47c0835f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:14:25, skipping insertion in model container [2023-11-24 23:14:25,452 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:14:24" (2/3) ... [2023-11-24 23:14:25,452 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47c0835f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:14:25, skipping insertion in model container [2023-11-24 23:14:25,452 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:14:25" (3/3) ... [2023-11-24 23:14:25,454 INFO L112 eAbstractionObserver]: Analyzing ICFG freire2_valuebound50.c [2023-11-24 23:14:25,474 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 23:14:25,475 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-24 23:14:25,525 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 23:14:25,532 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;@50a1297c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 23:14:25,533 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-24 23:14:25,537 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 8 states have (on average 1.5) internal successors, (12), 9 states have internal predecessors, (12), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-24 23:14:25,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-24 23:14:25,545 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:14:25,546 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-24 23:14:25,546 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:14:25,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:14:25,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1499849464, now seen corresponding path program 1 times [2023-11-24 23:14:25,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:14:25,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571421243] [2023-11-24 23:14:25,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:14:25,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:14:25,710 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 23:14:25,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1789350595] [2023-11-24 23:14:25,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:14:25,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:14:25,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25eb2c4d-c64e-410d-a43b-46e3b11fdb5a/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:14:25,715 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25eb2c4d-c64e-410d-a43b-46e3b11fdb5a/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:14:25,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25eb2c4d-c64e-410d-a43b-46e3b11fdb5a/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 23:14:25,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-24 23:14:25,835 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-24 23:14:25,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-24 23:14:25,862 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-11-24 23:14:25,865 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-24 23:14:25,866 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-11-24 23:14:25,895 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25eb2c4d-c64e-410d-a43b-46e3b11fdb5a/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-24 23:14:26,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25eb2c4d-c64e-410d-a43b-46e3b11fdb5a/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-24 23:14:26,079 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-11-24 23:14:26,083 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-24 23:14:26,102 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.11 11:14:26 BoogieIcfgContainer [2023-11-24 23:14:26,102 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-24 23:14:26,103 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-24 23:14:26,103 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-24 23:14:26,104 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-24 23:14:26,104 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:14:25" (3/4) ... [2023-11-24 23:14:26,106 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-11-24 23:14:26,107 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-24 23:14:26,108 INFO L158 Benchmark]: Toolchain (without parser) took 1406.67ms. Allocated memory was 159.4MB in the beginning and 203.4MB in the end (delta: 44.0MB). Free memory was 111.2MB in the beginning and 169.1MB in the end (delta: -57.9MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-24 23:14:26,109 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 159.4MB. Free memory is still 104.9MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-24 23:14:26,110 INFO L158 Benchmark]: CACSL2BoogieTranslator took 292.42ms. Allocated memory is still 159.4MB. Free memory was 111.2MB in the beginning and 100.2MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-24 23:14:26,110 INFO L158 Benchmark]: Boogie Procedure Inliner took 56.17ms. Allocated memory is still 159.4MB. Free memory was 100.2MB in the beginning and 98.6MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-24 23:14:26,111 INFO L158 Benchmark]: Boogie Preprocessor took 25.77ms. Allocated memory is still 159.4MB. Free memory was 98.6MB in the beginning and 97.3MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-24 23:14:26,112 INFO L158 Benchmark]: RCFGBuilder took 361.25ms. Allocated memory is still 159.4MB. Free memory was 97.3MB in the beginning and 85.0MB in the end (delta: 12.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-11-24 23:14:26,113 INFO L158 Benchmark]: TraceAbstraction took 656.07ms. Allocated memory was 159.4MB in the beginning and 203.4MB in the end (delta: 44.0MB). Free memory was 84.4MB in the beginning and 169.1MB in the end (delta: -84.7MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-24 23:14:26,113 INFO L158 Benchmark]: Witness Printer took 4.25ms. Allocated memory is still 203.4MB. Free memory is still 169.1MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-24 23:14:26,117 INFO L338 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 159.4MB. Free memory is still 104.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 292.42ms. Allocated memory is still 159.4MB. Free memory was 111.2MB in the beginning and 100.2MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 56.17ms. Allocated memory is still 159.4MB. Free memory was 100.2MB in the beginning and 98.6MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 25.77ms. Allocated memory is still 159.4MB. Free memory was 98.6MB in the beginning and 97.3MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 361.25ms. Allocated memory is still 159.4MB. Free memory was 97.3MB in the beginning and 85.0MB in the end (delta: 12.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 656.07ms. Allocated memory was 159.4MB in the beginning and 203.4MB in the end (delta: 44.0MB). Free memory was 84.4MB in the beginning and 169.1MB in the end (delta: -84.7MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 4.25ms. Allocated memory is still 203.4MB. Free memory is still 169.1MB. There was no memory consumed. 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 - UnprovableResult [Line: 19]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: overapproximation of to_int at line 34, overapproximation of someBinaryDOUBLEComparisonOperation at line 28. Possible FailurePath: [L25] int r; [L26] double a, x, s; [L27] a = __VERIFIER_nondet_double() [L28] CALL assume_abort_if_not(a>=0 && a<=50) [L14] COND FALSE !(!cond) [L28] RET assume_abort_if_not(a>=0 && a<=50) [L29] x = a [L30] s = 3.25 [L31] r = 1 VAL [a=2, r=1, s=13/4, x=2] [L33] COND TRUE 1 VAL [a=2, r=1, s=13/4, x=2] [L34] CALL __VERIFIER_assert((int)(4*s) - 12*r*r == 1) VAL [\old(cond)=0] [L17] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L19] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.6s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 6 NumberOfCodeBlocks, 6 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 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: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2023-11-24 23:14:26,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25eb2c4d-c64e-410d-a43b-46e3b11fdb5a/bin/utaipan-verify-SwPr7d2a91/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 Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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_25eb2c4d-c64e-410d-a43b-46e3b11fdb5a/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25eb2c4d-c64e-410d-a43b-46e3b11fdb5a/bin/utaipan-verify-SwPr7d2a91/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25eb2c4d-c64e-410d-a43b-46e3b11fdb5a/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25eb2c4d-c64e-410d-a43b-46e3b11fdb5a/bin/utaipan-verify-SwPr7d2a91/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/freire2_valuebound50.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25eb2c4d-c64e-410d-a43b-46e3b11fdb5a/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25eb2c4d-c64e-410d-a43b-46e3b11fdb5a/bin/utaipan-verify-SwPr7d2a91 --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 acf998c27a5d4b83a2feddb35e0896b9221e58140057280398a3180f484cbd82 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 23:14:28,911 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 23:14:29,051 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25eb2c4d-c64e-410d-a43b-46e3b11fdb5a/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2023-11-24 23:14:29,060 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 23:14:29,061 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 23:14:29,109 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 23:14:29,110 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 23:14:29,111 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 23:14:29,112 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 23:14:29,116 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 23:14:29,117 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-24 23:14:29,118 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-24 23:14:29,118 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-24 23:14:29,120 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-24 23:14:29,120 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-24 23:14:29,121 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-24 23:14:29,122 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 23:14:29,123 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 23:14:29,123 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 23:14:29,124 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 23:14:29,124 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 23:14:29,125 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 23:14:29,125 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 23:14:29,126 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 23:14:29,126 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-24 23:14:29,127 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-24 23:14:29,127 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-24 23:14:29,128 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 23:14:29,128 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 23:14:29,128 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 23:14:29,130 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 23:14:29,130 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 23:14:29,131 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 23:14:29,131 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 23:14:29,132 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:14:29,132 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 23:14:29,132 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 23:14:29,133 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 23:14:29,133 INFO L153 SettingsManager]: * Trace refinement strategy=WALRUS [2023-11-24 23:14:29,134 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-24 23:14:29,134 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 23:14:29,135 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 23:14:29,135 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-24 23:14:29,135 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 23:14:29,136 INFO L153 SettingsManager]: * Logic for external solver=AUFBV 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_25eb2c4d-c64e-410d-a43b-46e3b11fdb5a/bin/utaipan-verify-SwPr7d2a91/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25eb2c4d-c64e-410d-a43b-46e3b11fdb5a/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> acf998c27a5d4b83a2feddb35e0896b9221e58140057280398a3180f484cbd82 [2023-11-24 23:14:29,585 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 23:14:29,612 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 23:14:29,617 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 23:14:29,618 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 23:14:29,618 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 23:14:29,620 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25eb2c4d-c64e-410d-a43b-46e3b11fdb5a/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/nla-digbench-scaling/freire2_valuebound50.c [2023-11-24 23:14:32,805 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 23:14:33,120 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 23:14:33,121 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25eb2c4d-c64e-410d-a43b-46e3b11fdb5a/sv-benchmarks/c/nla-digbench-scaling/freire2_valuebound50.c [2023-11-24 23:14:33,130 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25eb2c4d-c64e-410d-a43b-46e3b11fdb5a/bin/utaipan-verify-SwPr7d2a91/data/276da2df4/aa187ea15a1243398bdaf7e67745fe85/FLAG87b42ac2e [2023-11-24 23:14:33,154 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25eb2c4d-c64e-410d-a43b-46e3b11fdb5a/bin/utaipan-verify-SwPr7d2a91/data/276da2df4/aa187ea15a1243398bdaf7e67745fe85 [2023-11-24 23:14:33,160 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 23:14:33,162 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 23:14:33,166 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 23:14:33,166 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 23:14:33,172 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 23:14:33,173 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:14:33" (1/1) ... [2023-11-24 23:14:33,174 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3aa9e731 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:14:33, skipping insertion in model container [2023-11-24 23:14:33,175 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:14:33" (1/1) ... [2023-11-24 23:14:33,204 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 23:14:33,423 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_25eb2c4d-c64e-410d-a43b-46e3b11fdb5a/sv-benchmarks/c/nla-digbench-scaling/freire2_valuebound50.c[709,722] [2023-11-24 23:14:33,474 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:14:33,490 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 23:14:33,506 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_25eb2c4d-c64e-410d-a43b-46e3b11fdb5a/sv-benchmarks/c/nla-digbench-scaling/freire2_valuebound50.c[709,722] [2023-11-24 23:14:33,535 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:14:33,559 INFO L206 MainTranslator]: Completed translation [2023-11-24 23:14:33,559 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:14:33 WrapperNode [2023-11-24 23:14:33,560 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 23:14:33,561 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 23:14:33,561 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 23:14:33,562 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 23:14:33,570 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:14:33" (1/1) ... [2023-11-24 23:14:33,596 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:14:33" (1/1) ... [2023-11-24 23:14:33,632 INFO L138 Inliner]: procedures = 15, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 41 [2023-11-24 23:14:33,635 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 23:14:33,636 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 23:14:33,636 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 23:14:33,637 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 23:14:33,667 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:14:33" (1/1) ... [2023-11-24 23:14:33,667 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:14:33" (1/1) ... [2023-11-24 23:14:33,678 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:14:33" (1/1) ... [2023-11-24 23:14:33,679 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:14:33" (1/1) ... [2023-11-24 23:14:33,703 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:14:33" (1/1) ... [2023-11-24 23:14:33,735 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:14:33" (1/1) ... [2023-11-24 23:14:33,738 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:14:33" (1/1) ... [2023-11-24 23:14:33,740 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:14:33" (1/1) ... [2023-11-24 23:14:33,743 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 23:14:33,746 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 23:14:33,747 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 23:14:33,747 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 23:14:33,748 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:14:33" (1/1) ... [2023-11-24 23:14:33,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:14:33,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25eb2c4d-c64e-410d-a43b-46e3b11fdb5a/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:14:33,793 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25eb2c4d-c64e-410d-a43b-46e3b11fdb5a/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-24 23:14:33,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25eb2c4d-c64e-410d-a43b-46e3b11fdb5a/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-24 23:14:33,850 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 23:14:33,850 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-11-24 23:14:33,851 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 23:14:33,851 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 23:14:33,851 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-24 23:14:33,852 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-24 23:14:33,955 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 23:14:33,960 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 23:14:36,545 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 23:14:36,578 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 23:14:36,578 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-24 23:14:36,579 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:14:36 BoogieIcfgContainer [2023-11-24 23:14:36,579 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 23:14:36,582 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 23:14:36,582 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 23:14:36,587 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 23:14:36,592 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 11:14:33" (1/3) ... [2023-11-24 23:14:36,593 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27fae6a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:14:36, skipping insertion in model container [2023-11-24 23:14:36,594 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:14:33" (2/3) ... [2023-11-24 23:14:36,594 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27fae6a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:14:36, skipping insertion in model container [2023-11-24 23:14:36,594 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:14:36" (3/3) ... [2023-11-24 23:14:36,596 INFO L112 eAbstractionObserver]: Analyzing ICFG freire2_valuebound50.c [2023-11-24 23:14:36,617 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 23:14:36,617 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-24 23:14:36,671 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 23:14:36,678 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;@1b759aa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 23:14:36,679 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-24 23:14:36,683 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-24 23:14:36,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-24 23:14:36,690 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:14:36,691 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:14:36,691 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:14:36,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:14:36,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1841396225, now seen corresponding path program 1 times [2023-11-24 23:14:36,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-24 23:14:36,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1850583219] [2023-11-24 23:14:36,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:14:36,708 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 23:14:36,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25eb2c4d-c64e-410d-a43b-46e3b11fdb5a/bin/utaipan-verify-SwPr7d2a91/mathsat [2023-11-24 23:14:36,718 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25eb2c4d-c64e-410d-a43b-46e3b11fdb5a/bin/utaipan-verify-SwPr7d2a91/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-24 23:14:36,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25eb2c4d-c64e-410d-a43b-46e3b11fdb5a/bin/utaipan-verify-SwPr7d2a91/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-11-24 23:14:36,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:14:36,883 INFO L262 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-24 23:14:36,887 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:14:36,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:14:36,909 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:14:36,910 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-24 23:14:36,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1850583219] [2023-11-24 23:14:36,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1850583219] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:14:36,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:14:36,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 23:14:36,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74470297] [2023-11-24 23:14:36,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:14:36,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-24 23:14:36,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-24 23:14:36,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-24 23:14:36,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-24 23:14:36,968 INFO L87 Difference]: Start difference. First operand has 19 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:14:37,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:14:37,003 INFO L93 Difference]: Finished difference Result 36 states and 59 transitions. [2023-11-24 23:14:37,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-24 23:14:37,006 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-24 23:14:37,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:14:37,014 INFO L225 Difference]: With dead ends: 36 [2023-11-24 23:14:37,014 INFO L226 Difference]: Without dead ends: 17 [2023-11-24 23:14:37,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-24 23:14:37,021 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 23:14:37,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 23:14:37,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-11-24 23:14:37,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-11-24 23:14:37,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 10 states have internal predecessors, (11), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-24 23:14:37,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2023-11-24 23:14:37,065 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 22 transitions. Word has length 8 [2023-11-24 23:14:37,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:14:37,066 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 22 transitions. [2023-11-24 23:14:37,066 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:14:37,067 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 22 transitions. [2023-11-24 23:14:37,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-24 23:14:37,067 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:14:37,068 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:14:37,080 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25eb2c4d-c64e-410d-a43b-46e3b11fdb5a/bin/utaipan-verify-SwPr7d2a91/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-11-24 23:14:37,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25eb2c4d-c64e-410d-a43b-46e3b11fdb5a/bin/utaipan-verify-SwPr7d2a91/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 23:14:37,274 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:14:37,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:14:37,275 INFO L85 PathProgramCache]: Analyzing trace with hash -676895413, now seen corresponding path program 1 times [2023-11-24 23:14:37,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-24 23:14:37,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1643203633] [2023-11-24 23:14:37,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:14:37,277 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 23:14:37,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25eb2c4d-c64e-410d-a43b-46e3b11fdb5a/bin/utaipan-verify-SwPr7d2a91/mathsat [2023-11-24 23:14:37,279 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25eb2c4d-c64e-410d-a43b-46e3b11fdb5a/bin/utaipan-verify-SwPr7d2a91/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-24 23:14:37,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25eb2c4d-c64e-410d-a43b-46e3b11fdb5a/bin/utaipan-verify-SwPr7d2a91/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-11-24 23:14:37,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-24 23:14:37,449 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-24 23:14:37,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-24 23:14:37,580 ERROR L246 FreeRefinementEngine]: Caught known exception: Invalid model [2023-11-24 23:14:37,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1119149942] [2023-11-24 23:14:37,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:14:37,581 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-24 23:14:37,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25eb2c4d-c64e-410d-a43b-46e3b11fdb5a/bin/utaipan-verify-SwPr7d2a91/cvc4 [2023-11-24 23:14:37,617 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25eb2c4d-c64e-410d-a43b-46e3b11fdb5a/bin/utaipan-verify-SwPr7d2a91/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-24 23:14:37,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25eb2c4d-c64e-410d-a43b-46e3b11fdb5a/bin/utaipan-verify-SwPr7d2a91/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2023-11-24 23:14:37,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:14:37,786 INFO L262 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-24 23:14:37,788 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:14:38,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:14:38,001 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:14:38,001 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-24 23:14:38,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1643203633] [2023-11-24 23:14:38,002 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 23:14:38,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1119149942] [2023-11-24 23:14:38,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1119149942] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:14:38,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:14:38,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 23:14:38,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015035996] [2023-11-24 23:14:38,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:14:38,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 23:14:38,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-24 23:14:38,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 23:14:38,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:14:38,006 INFO L87 Difference]: Start difference. First operand 17 states and 22 transitions. Second operand has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:14:40,025 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-24 23:14:43,201 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-24 23:14:45,205 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-24 23:14:47,208 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-24 23:14:49,406 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Bool, RoundingMode, FloatingPoint, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-24 23:14:51,410 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, RoundingMode, FloatingPoint, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-24 23:14:54,442 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.60s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-24 23:14:56,447 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-24 23:14:58,459 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-24 23:15:00,986 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.52s for a HTC check with result UNKNOWN. Formula has sorts [Bool, RoundingMode, FloatingPoint, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-24 23:15:02,993 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, RoundingMode, FloatingPoint, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-24 23:15:04,996 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, RoundingMode, FloatingPoint, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-24 23:15:06,702 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-24 23:15:10,607 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-24 23:15:12,609 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-24 23:15:14,614 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-24 23:15:17,710 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.16s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-24 23:15:19,713 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-24 23:15:21,716 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-24 23:15:23,849 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Bool, RoundingMode, FloatingPoint, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-24 23:15:26,768 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Bool, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-24 23:15:28,771 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, RoundingMode, FloatingPoint, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-24 23:15:31,156 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.38s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-24 23:15:33,163 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers []