./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 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_eb91289d-01d3-49aa-b3dc-64c5e3b98661/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb91289d-01d3-49aa-b3dc-64c5e3b98661/bin/utaipan-verify-NcY6lQBIFX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb91289d-01d3-49aa-b3dc-64c5e3b98661/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb91289d-01d3-49aa-b3dc-64c5e3b98661/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound20.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb91289d-01d3-49aa-b3dc-64c5e3b98661/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb91289d-01d3-49aa-b3dc-64c5e3b98661/bin/utaipan-verify-NcY6lQBIFX --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 4a3cef13903dd032b032a92c3e6d07b1ee77361a4ee844998d70fb602ded6daa --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:14:25,139 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:14:25,241 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb91289d-01d3-49aa-b3dc-64c5e3b98661/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-12 00:14:25,247 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:14:25,248 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:14:25,274 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:14:25,275 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:14:25,276 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:14:25,276 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:14:25,277 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:14:25,278 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:14:25,278 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:14:25,279 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:14:25,279 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:14:25,280 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:14:25,280 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:14:25,281 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:14:25,282 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:14:25,282 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:14:25,283 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:14:25,283 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:14:25,284 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:14:25,285 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:14:25,285 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 00:14:25,286 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 00:14:25,286 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:14:25,287 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 00:14:25,287 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:14:25,288 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 00:14:25,288 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:14:25,289 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 00:14:25,290 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 00:14:25,290 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 00:14:25,291 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:14:25,291 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:14:25,292 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:14:25,292 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:14:25,293 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:14:25,293 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:14:25,294 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 00:14:25,294 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:14:25,295 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:14:25,295 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 00:14:25,295 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:14:25,296 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:14:25,296 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_eb91289d-01d3-49aa-b3dc-64c5e3b98661/bin/utaipan-verify-NcY6lQBIFX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb91289d-01d3-49aa-b3dc-64c5e3b98661/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4a3cef13903dd032b032a92c3e6d07b1ee77361a4ee844998d70fb602ded6daa [2023-11-12 00:14:25,628 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:14:25,655 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:14:25,658 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:14:25,659 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:14:25,660 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:14:25,663 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb91289d-01d3-49aa-b3dc-64c5e3b98661/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound20.c [2023-11-12 00:14:28,813 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:14:29,115 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:14:29,116 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb91289d-01d3-49aa-b3dc-64c5e3b98661/sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound20.c [2023-11-12 00:14:29,126 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb91289d-01d3-49aa-b3dc-64c5e3b98661/bin/utaipan-verify-NcY6lQBIFX/data/471efaab8/e6b95f7344334e64a091ac233d1b25a2/FLAGfe9eed449 [2023-11-12 00:14:29,143 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb91289d-01d3-49aa-b3dc-64c5e3b98661/bin/utaipan-verify-NcY6lQBIFX/data/471efaab8/e6b95f7344334e64a091ac233d1b25a2 [2023-11-12 00:14:29,146 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:14:29,148 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:14:29,150 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:14:29,151 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:14:29,157 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:14:29,159 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:14:29" (1/1) ... [2023-11-12 00:14:29,160 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5cc45747 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:14:29, skipping insertion in model container [2023-11-12 00:14:29,160 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:14:29" (1/1) ... [2023-11-12 00:14:29,186 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:14:29,421 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_eb91289d-01d3-49aa-b3dc-64c5e3b98661/sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound20.c[573,586] [2023-11-12 00:14:29,443 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:14:29,461 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:14:29,477 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_eb91289d-01d3-49aa-b3dc-64c5e3b98661/sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound20.c[573,586] [2023-11-12 00:14:29,491 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:14:29,513 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:14:29,513 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:14:29 WrapperNode [2023-11-12 00:14:29,513 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:14:29,515 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:14:29,515 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:14:29,516 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:14:29,524 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:14:29" (1/1) ... [2023-11-12 00:14:29,534 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:14:29" (1/1) ... [2023-11-12 00:14:29,556 INFO L138 Inliner]: procedures = 14, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 48 [2023-11-12 00:14:29,556 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:14:29,557 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:14:29,557 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:14:29,557 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:14:29,568 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:14:29" (1/1) ... [2023-11-12 00:14:29,569 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:14:29" (1/1) ... [2023-11-12 00:14:29,584 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:14:29" (1/1) ... [2023-11-12 00:14:29,584 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:14:29" (1/1) ... [2023-11-12 00:14:29,588 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:14:29" (1/1) ... [2023-11-12 00:14:29,592 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:14:29" (1/1) ... [2023-11-12 00:14:29,593 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:14:29" (1/1) ... [2023-11-12 00:14:29,594 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:14:29" (1/1) ... [2023-11-12 00:14:29,596 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:14:29,597 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:14:29,597 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:14:29,597 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:14:29,598 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:14:29" (1/1) ... [2023-11-12 00:14:29,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:14:29,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb91289d-01d3-49aa-b3dc-64c5e3b98661/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:14:29,643 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb91289d-01d3-49aa-b3dc-64c5e3b98661/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:14:29,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb91289d-01d3-49aa-b3dc-64c5e3b98661/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:14:29,682 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:14:29,683 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-12 00:14:29,683 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-12 00:14:29,683 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:14:29,683 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:14:29,684 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:14:29,684 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-12 00:14:29,684 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-12 00:14:29,766 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:14:29,769 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:14:29,968 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:14:30,004 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:14:30,005 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-12 00:14:30,007 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:14:30 BoogieIcfgContainer [2023-11-12 00:14:30,008 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:14:30,011 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:14:30,011 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:14:30,015 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:14:30,015 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:14:29" (1/3) ... [2023-11-12 00:14:30,016 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ce42d95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:14:30, skipping insertion in model container [2023-11-12 00:14:30,016 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:14:29" (2/3) ... [2023-11-12 00:14:30,016 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ce42d95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:14:30, skipping insertion in model container [2023-11-12 00:14:30,017 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:14:30" (3/3) ... [2023-11-12 00:14:30,018 INFO L112 eAbstractionObserver]: Analyzing ICFG mannadiv_unwindbound20.c [2023-11-12 00:14:30,039 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:14:30,039 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 00:14:30,088 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:14:30,096 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;@20e4118a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:14:30,097 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 00:14:30,101 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-12 00:14:30,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-12 00:14:30,109 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:14:30,110 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:14:30,110 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:14:30,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:14:30,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1046920148, now seen corresponding path program 1 times [2023-11-12 00:14:30,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:14:30,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601916989] [2023-11-12 00:14:30,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:14:30,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:14:30,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:14:30,260 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:14:30,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601916989] [2023-11-12 00:14:30,262 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-12 00:14:30,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104078037] [2023-11-12 00:14:30,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:14:30,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:14:30,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb91289d-01d3-49aa-b3dc-64c5e3b98661/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:14:30,266 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb91289d-01d3-49aa-b3dc-64c5e3b98661/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:14:30,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb91289d-01d3-49aa-b3dc-64c5e3b98661/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 00:14:30,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:14:30,350 INFO L262 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-12 00:14:30,355 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:14:30,380 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 00:14:30,380 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:14:30,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104078037] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:14:30,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:14:30,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:14:30,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107499967] [2023-11-12 00:14:30,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:14:30,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-12 00:14:30,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:14:30,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-12 00:14:30,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 00:14:30,424 INFO L87 Difference]: Start difference. First operand has 19 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-12 00:14:30,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:14:30,457 INFO L93 Difference]: Finished difference Result 32 states and 43 transitions. [2023-11-12 00:14:30,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-12 00:14:30,460 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 13 [2023-11-12 00:14:30,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:14:30,467 INFO L225 Difference]: With dead ends: 32 [2023-11-12 00:14:30,467 INFO L226 Difference]: Without dead ends: 17 [2023-11-12 00:14:30,469 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 00:14:30,473 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:14:30,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:14:30,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-11-12 00:14:30,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-11-12 00:14:30,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-12 00:14:30,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2023-11-12 00:14:30,513 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 13 [2023-11-12 00:14:30,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:14:30,515 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2023-11-12 00:14:30,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-12 00:14:30,515 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2023-11-12 00:14:30,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-12 00:14:30,517 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:14:30,517 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:14:30,530 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb91289d-01d3-49aa-b3dc-64c5e3b98661/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 00:14:30,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb91289d-01d3-49aa-b3dc-64c5e3b98661/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-12 00:14:30,724 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:14:30,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:14:30,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1317434454, now seen corresponding path program 1 times [2023-11-12 00:14:30,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:14:30,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722944087] [2023-11-12 00:14:30,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:14:30,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:14:30,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:14:30,798 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:14:30,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722944087] [2023-11-12 00:14:30,801 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-12 00:14:30,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089317815] [2023-11-12 00:14:30,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:14:30,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:14:30,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb91289d-01d3-49aa-b3dc-64c5e3b98661/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:14:30,809 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb91289d-01d3-49aa-b3dc-64c5e3b98661/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:14:30,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb91289d-01d3-49aa-b3dc-64c5e3b98661/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 00:14:30,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:14:30,872 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 00:14:30,874 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:14:30,946 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 00:14:30,946 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:14:30,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089317815] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:14:30,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:14:30,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:14:30,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700889889] [2023-11-12 00:14:30,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:14:30,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:14:30,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:14:30,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:14:30,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:14:30,951 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-12 00:14:30,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:14:30,977 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2023-11-12 00:14:30,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 00:14:30,978 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 14 [2023-11-12 00:14:30,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:14:30,979 INFO L225 Difference]: With dead ends: 26 [2023-11-12 00:14:30,979 INFO L226 Difference]: Without dead ends: 19 [2023-11-12 00:14:30,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:14:30,981 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:14:30,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:14:30,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-11-12 00:14:30,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-11-12 00:14:30,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-12 00:14:30,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2023-11-12 00:14:30,989 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 14 [2023-11-12 00:14:30,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:14:30,990 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2023-11-12 00:14:30,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-12 00:14:30,991 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2023-11-12 00:14:30,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-12 00:14:30,991 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:14:30,992 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:14:31,001 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb91289d-01d3-49aa-b3dc-64c5e3b98661/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 00:14:31,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb91289d-01d3-49aa-b3dc-64c5e3b98661/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:14:31,198 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:14:31,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:14:31,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1319221914, now seen corresponding path program 1 times [2023-11-12 00:14:31,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:14:31,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904545893] [2023-11-12 00:14:31,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:14:31,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:14:31,225 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:14:31,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [501591260] [2023-11-12 00:14:31,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:14:31,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:14:31,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb91289d-01d3-49aa-b3dc-64c5e3b98661/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:14:31,227 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb91289d-01d3-49aa-b3dc-64c5e3b98661/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:14:31,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb91289d-01d3-49aa-b3dc-64c5e3b98661/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 00:14:31,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:14:31,308 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-12 00:14:31,311 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:14:31,741 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 00:14:31,742 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:14:31,742 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:14:31,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904545893] [2023-11-12 00:14:31,743 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:14:31,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501591260] [2023-11-12 00:14:31,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501591260] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:14:31,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:14:31,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-12 00:14:31,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943923908] [2023-11-12 00:14:31,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:14:31,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-12 00:14:31,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:14:31,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-12 00:14:31,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-11-12 00:14:31,749 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 9 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 00:14:31,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:14:31,885 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2023-11-12 00:14:31,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 00:14:31,886 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 14 [2023-11-12 00:14:31,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:14:31,890 INFO L225 Difference]: With dead ends: 28 [2023-11-12 00:14:31,890 INFO L226 Difference]: Without dead ends: 26 [2023-11-12 00:14:31,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-11-12 00:14:31,896 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 20 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:14:31,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 53 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:14:31,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-12 00:14:31,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2023-11-12 00:14:31,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 15 states have (on average 1.2) internal successors, (18), 17 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-12 00:14:31,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2023-11-12 00:14:31,927 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 14 [2023-11-12 00:14:31,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:14:31,931 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2023-11-12 00:14:31,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 00:14:31,932 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2023-11-12 00:14:31,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-12 00:14:31,935 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:14:31,935 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:14:31,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb91289d-01d3-49aa-b3dc-64c5e3b98661/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 00:14:32,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb91289d-01d3-49aa-b3dc-64c5e3b98661/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:14:32,141 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:14:32,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:14:32,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1562521278, now seen corresponding path program 1 times [2023-11-12 00:14:32,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:14:32,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804314778] [2023-11-12 00:14:32,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:14:32,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:14:32,174 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:14:32,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [459989732] [2023-11-12 00:14:32,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:14:32,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:14:32,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb91289d-01d3-49aa-b3dc-64c5e3b98661/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:14:32,183 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb91289d-01d3-49aa-b3dc-64c5e3b98661/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:14:32,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb91289d-01d3-49aa-b3dc-64c5e3b98661/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 00:14:32,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:14:32,242 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-12 00:14:32,249 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:14:32,457 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 00:14:32,457 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:14:32,627 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 00:14:32,628 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:14:32,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804314778] [2023-11-12 00:14:32,630 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:14:32,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459989732] [2023-11-12 00:14:32,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459989732] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:14:32,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1116862241] [2023-11-12 00:14:32,657 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-11-12 00:14:32,658 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:14:32,662 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:14:32,668 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:14:32,669 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:14:33,402 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 57 for LOIs [2023-11-12 00:14:33,540 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-11-12 00:14:33,614 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:14:35,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1116862241] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:14:35,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-12 00:14:35,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [11, 7] total 26 [2023-11-12 00:14:35,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549634002] [2023-11-12 00:14:35,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:14:35,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-12 00:14:35,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:14:35,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-12 00:14:35,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2023-11-12 00:14:35,010 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 13 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-12 00:14:35,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:14:35,185 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2023-11-12 00:14:35,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-12 00:14:35,186 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 20 [2023-11-12 00:14:35,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:14:35,187 INFO L225 Difference]: With dead ends: 32 [2023-11-12 00:14:35,187 INFO L226 Difference]: Without dead ends: 25 [2023-11-12 00:14:35,188 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2023-11-12 00:14:35,189 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:14:35,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:14:35,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-11-12 00:14:35,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-11-12 00:14:35,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-12 00:14:35,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2023-11-12 00:14:35,199 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 20 [2023-11-12 00:14:35,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:14:35,200 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2023-11-12 00:14:35,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-12 00:14:35,200 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2023-11-12 00:14:35,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-12 00:14:35,201 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:14:35,202 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:14:35,212 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb91289d-01d3-49aa-b3dc-64c5e3b98661/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 00:14:35,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb91289d-01d3-49aa-b3dc-64c5e3b98661/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:14:35,413 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:14:35,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:14:35,413 INFO L85 PathProgramCache]: Analyzing trace with hash -182192907, now seen corresponding path program 1 times [2023-11-12 00:14:35,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:14:35,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911269037] [2023-11-12 00:14:35,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:14:35,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:14:35,431 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:14:35,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [626948094] [2023-11-12 00:14:35,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:14:35,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:14:35,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb91289d-01d3-49aa-b3dc-64c5e3b98661/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:14:35,451 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb91289d-01d3-49aa-b3dc-64c5e3b98661/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:14:35,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb91289d-01d3-49aa-b3dc-64c5e3b98661/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 00:14:35,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:14:35,509 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-12 00:14:35,512 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:14:35,554 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 00:14:35,554 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:14:35,595 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 00:14:35,595 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:14:35,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911269037] [2023-11-12 00:14:35,595 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:14:35,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626948094] [2023-11-12 00:14:35,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626948094] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:14:35,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2137110219] [2023-11-12 00:14:35,599 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-11-12 00:14:35,599 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:14:35,599 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:14:35,600 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:14:35,600 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:14:36,202 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 59 for LOIs [2023-11-12 00:14:36,303 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-11-12 00:14:36,340 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:14:37,520 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '709#(and (<= 1 |#StackHeapBarrier|) (<= 1 ~counter~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-11-12 00:14:37,520 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:14:37,520 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 00:14:37,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2023-11-12 00:14:37,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411816224] [2023-11-12 00:14:37,521 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 00:14:37,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 00:14:37,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:14:37,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 00:14:37,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2023-11-12 00:14:37,523 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-12 00:14:37,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:14:37,637 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2023-11-12 00:14:37,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-12 00:14:37,637 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 22 [2023-11-12 00:14:37,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:14:37,639 INFO L225 Difference]: With dead ends: 56 [2023-11-12 00:14:37,639 INFO L226 Difference]: Without dead ends: 49 [2023-11-12 00:14:37,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2023-11-12 00:14:37,641 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 25 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:14:37,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 68 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:14:37,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-11-12 00:14:37,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2023-11-12 00:14:37,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 33 states have internal predecessors, (37), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-12 00:14:37,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2023-11-12 00:14:37,658 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 22 [2023-11-12 00:14:37,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:14:37,659 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2023-11-12 00:14:37,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-12 00:14:37,659 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2023-11-12 00:14:37,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-12 00:14:37,661 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:14:37,661 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:14:37,671 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb91289d-01d3-49aa-b3dc-64c5e3b98661/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-12 00:14:37,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb91289d-01d3-49aa-b3dc-64c5e3b98661/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:14:37,868 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:14:37,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:14:37,868 INFO L85 PathProgramCache]: Analyzing trace with hash -180405447, now seen corresponding path program 1 times [2023-11-12 00:14:37,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:14:37,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796061436] [2023-11-12 00:14:37,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:14:37,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:14:37,900 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:14:37,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [109543508] [2023-11-12 00:14:37,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:14:37,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:14:37,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb91289d-01d3-49aa-b3dc-64c5e3b98661/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:14:37,904 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb91289d-01d3-49aa-b3dc-64c5e3b98661/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:14:37,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb91289d-01d3-49aa-b3dc-64c5e3b98661/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 00:14:37,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:14:37,970 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-12 00:14:37,972 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:14:38,297 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 00:14:38,297 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:14:38,442 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 00:14:38,443 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:14:38,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796061436] [2023-11-12 00:14:38,443 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:14:38,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109543508] [2023-11-12 00:14:38,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109543508] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:14:38,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [726755650] [2023-11-12 00:14:38,448 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-11-12 00:14:38,448 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:14:38,448 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:14:38,449 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:14:38,449 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:14:39,024 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 33 for LOIs [2023-11-12 00:14:39,055 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-11-12 00:14:39,100 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:14:40,042 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1009#(and (<= 1 |#StackHeapBarrier|) (<= 1 ~counter~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (<= ~counter~0 20))' at error location [2023-11-12 00:14:40,042 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:14:40,042 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 00:14:40,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 13 [2023-11-12 00:14:40,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109723061] [2023-11-12 00:14:40,043 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 00:14:40,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-12 00:14:40,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:14:40,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-12 00:14:40,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2023-11-12 00:14:40,045 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 5 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-12 00:14:40,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:14:40,205 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2023-11-12 00:14:40,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-12 00:14:40,207 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 5 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 22 [2023-11-12 00:14:40,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:14:40,208 INFO L225 Difference]: With dead ends: 59 [2023-11-12 00:14:40,208 INFO L226 Difference]: Without dead ends: 51 [2023-11-12 00:14:40,209 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2023-11-12 00:14:40,209 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 26 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:14:40,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 70 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:14:40,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-11-12 00:14:40,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2023-11-12 00:14:40,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 32 states have (on average 1.125) internal successors, (36), 32 states have internal predecessors, (36), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-12 00:14:40,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2023-11-12 00:14:40,229 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 22 [2023-11-12 00:14:40,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:14:40,229 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2023-11-12 00:14:40,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 5 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-12 00:14:40,231 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2023-11-12 00:14:40,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-12 00:14:40,232 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:14:40,234 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:14:40,245 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb91289d-01d3-49aa-b3dc-64c5e3b98661/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-12 00:14:40,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb91289d-01d3-49aa-b3dc-64c5e3b98661/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-12 00:14:40,440 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:14:40,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:14:40,441 INFO L85 PathProgramCache]: Analyzing trace with hash 408559265, now seen corresponding path program 1 times [2023-11-12 00:14:40,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:14:40,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392989534] [2023-11-12 00:14:40,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:14:40,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:14:40,454 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:14:40,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1044866684] [2023-11-12 00:14:40,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:14:40,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:14:40,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb91289d-01d3-49aa-b3dc-64c5e3b98661/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:14:40,456 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb91289d-01d3-49aa-b3dc-64c5e3b98661/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:14:40,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb91289d-01d3-49aa-b3dc-64c5e3b98661/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 00:14:40,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:14:40,523 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-12 00:14:40,526 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:14:40,689 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 00:14:40,689 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:14:40,805 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 00:14:40,805 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:14:40,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392989534] [2023-11-12 00:14:40,806 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:14:40,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044866684] [2023-11-12 00:14:40,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044866684] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:14:40,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1326422504] [2023-11-12 00:14:40,811 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-11-12 00:14:40,811 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:14:40,812 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:14:40,813 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:14:40,813 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:14:41,433 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 9 for LOIs [2023-11-12 00:14:41,439 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-11-12 00:14:41,462 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:14:42,257 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1348#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-11-12 00:14:42,258 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:14:42,258 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 00:14:42,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2023-11-12 00:14:42,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953813865] [2023-11-12 00:14:42,258 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 00:14:42,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-12 00:14:42,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:14:42,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-12 00:14:42,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2023-11-12 00:14:42,260 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand has 13 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-12 00:14:42,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:14:42,436 INFO L93 Difference]: Finished difference Result 50 states and 53 transitions. [2023-11-12 00:14:42,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-12 00:14:42,436 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 28 [2023-11-12 00:14:42,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:14:42,437 INFO L225 Difference]: With dead ends: 50 [2023-11-12 00:14:42,437 INFO L226 Difference]: Without dead ends: 45 [2023-11-12 00:14:42,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 57 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2023-11-12 00:14:42,439 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 18 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:14:42,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 131 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:14:42,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-11-12 00:14:42,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2023-11-12 00:14:42,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 32 states have (on average 1.03125) internal successors, (33), 32 states have internal predecessors, (33), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-12 00:14:42,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2023-11-12 00:14:42,455 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 28 [2023-11-12 00:14:42,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:14:42,455 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2023-11-12 00:14:42,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-12 00:14:42,456 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2023-11-12 00:14:42,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-12 00:14:42,457 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:14:42,457 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:14:42,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb91289d-01d3-49aa-b3dc-64c5e3b98661/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-12 00:14:42,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb91289d-01d3-49aa-b3dc-64c5e3b98661/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:14:42,663 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:14:42,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:14:42,664 INFO L85 PathProgramCache]: Analyzing trace with hash -235004718, now seen corresponding path program 2 times [2023-11-12 00:14:42,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:14:42,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420665847] [2023-11-12 00:14:42,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:14:42,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:14:42,677 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:14:42,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1073463238] [2023-11-12 00:14:42,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 00:14:42,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:14:42,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb91289d-01d3-49aa-b3dc-64c5e3b98661/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:14:42,679 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb91289d-01d3-49aa-b3dc-64c5e3b98661/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:14:42,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb91289d-01d3-49aa-b3dc-64c5e3b98661/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-12 00:14:42,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-11-12 00:14:42,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:14:42,752 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-12 00:14:42,755 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:14:42,855 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 00:14:42,855 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:14:42,985 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-12 00:14:42,985 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:14:42,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420665847] [2023-11-12 00:14:42,986 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:14:42,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073463238] [2023-11-12 00:14:42,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073463238] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:14:42,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [995431807] [2023-11-12 00:14:42,989 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-11-12 00:14:42,989 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:14:42,989 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:14:42,989 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:14:42,989 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:14:43,576 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-11-12 00:14:43,580 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-11-12 00:14:43,611 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:14:44,321 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1782#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-11-12 00:14:44,321 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:14:44,321 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 00:14:44,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2023-11-12 00:14:44,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526316638] [2023-11-12 00:14:44,322 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 00:14:44,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-12 00:14:44,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:14:44,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-12 00:14:44,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=482, Unknown=0, NotChecked=0, Total=650 [2023-11-12 00:14:44,324 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 11 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2023-11-12 00:14:44,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:14:44,600 INFO L93 Difference]: Finished difference Result 98 states and 104 transitions. [2023-11-12 00:14:44,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-12 00:14:44,603 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 11 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) Word has length 46 [2023-11-12 00:14:44,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:14:44,605 INFO L225 Difference]: With dead ends: 98 [2023-11-12 00:14:44,605 INFO L226 Difference]: Without dead ends: 93 [2023-11-12 00:14:44,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=290, Invalid=900, Unknown=0, NotChecked=0, Total=1190 [2023-11-12 00:14:44,607 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 44 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:14:44,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 84 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:14:44,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2023-11-12 00:14:44,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2023-11-12 00:14:44,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 68 states have (on average 1.0147058823529411) internal successors, (69), 68 states have internal predecessors, (69), 13 states have call successors, (13), 12 states have call predecessors, (13), 11 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-12 00:14:44,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2023-11-12 00:14:44,627 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 46 [2023-11-12 00:14:44,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:14:44,627 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2023-11-12 00:14:44,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 11 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2023-11-12 00:14:44,628 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2023-11-12 00:14:44,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-11-12 00:14:44,630 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:14:44,630 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:14:44,641 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb91289d-01d3-49aa-b3dc-64c5e3b98661/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-12 00:14:44,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb91289d-01d3-49aa-b3dc-64c5e3b98661/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:14:44,833 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:14:44,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:14:44,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1419782260, now seen corresponding path program 3 times [2023-11-12 00:14:44,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:14:44,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179837581] [2023-11-12 00:14:44,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:14:44,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:14:44,847 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:14:44,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [395186859] [2023-11-12 00:14:44,847 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 00:14:44,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:14:44,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb91289d-01d3-49aa-b3dc-64c5e3b98661/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:14:44,848 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb91289d-01d3-49aa-b3dc-64c5e3b98661/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:14:44,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb91289d-01d3-49aa-b3dc-64c5e3b98661/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-12 00:14:44,947 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 00:14:44,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:14:44,949 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-12 00:14:44,953 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:14:45,170 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 20 proven. 380 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 00:14:45,170 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:14:45,470 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 20 proven. 200 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2023-11-12 00:14:45,470 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:14:45,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179837581] [2023-11-12 00:14:45,470 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:14:45,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395186859] [2023-11-12 00:14:45,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395186859] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:14:45,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1391497897] [2023-11-12 00:14:45,473 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-11-12 00:14:45,473 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:14:45,473 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:14:45,473 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:14:45,474 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:14:46,068 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-11-12 00:14:46,071 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-11-12 00:14:46,095 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:14:46,884 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2659#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-11-12 00:14:46,884 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:14:46,884 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 00:14:46,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2023-11-12 00:14:46,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700947679] [2023-11-12 00:14:46,885 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 00:14:46,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-12 00:14:46,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:14:46,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-12 00:14:46,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=393, Invalid=867, Unknown=0, NotChecked=0, Total=1260 [2023-11-12 00:14:46,888 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand has 24 states, 24 states have (on average 4.291666666666667) internal successors, (103), 24 states have internal predecessors, (103), 21 states have call successors, (25), 13 states have call predecessors, (25), 12 states have return successors, (24), 20 states have call predecessors, (24), 20 states have call successors, (24) [2023-11-12 00:14:47,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:14:47,469 INFO L93 Difference]: Finished difference Result 178 states and 188 transitions. [2023-11-12 00:14:47,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-11-12 00:14:47,470 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.291666666666667) internal successors, (103), 24 states have internal predecessors, (103), 21 states have call successors, (25), 13 states have call predecessors, (25), 12 states have return successors, (24), 20 states have call predecessors, (24), 20 states have call successors, (24) Word has length 94 [2023-11-12 00:14:47,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:14:47,472 INFO L225 Difference]: With dead ends: 178 [2023-11-12 00:14:47,473 INFO L226 Difference]: Without dead ends: 173 [2023-11-12 00:14:47,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 244 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 825 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=841, Invalid=2129, Unknown=0, NotChecked=0, Total=2970 [2023-11-12 00:14:47,475 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 69 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:14:47,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 114 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:14:47,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2023-11-12 00:14:47,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2023-11-12 00:14:47,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 128 states have (on average 1.0078125) internal successors, (129), 128 states have internal predecessors, (129), 23 states have call successors, (23), 22 states have call predecessors, (23), 21 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2023-11-12 00:14:47,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 174 transitions. [2023-11-12 00:14:47,509 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 174 transitions. Word has length 94 [2023-11-12 00:14:47,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:14:47,510 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 174 transitions. [2023-11-12 00:14:47,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.291666666666667) internal successors, (103), 24 states have internal predecessors, (103), 21 states have call successors, (25), 13 states have call predecessors, (25), 12 states have return successors, (24), 20 states have call predecessors, (24), 20 states have call successors, (24) [2023-11-12 00:14:47,510 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 174 transitions. [2023-11-12 00:14:47,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2023-11-12 00:14:47,514 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:14:47,514 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 20, 20, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:14:47,526 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb91289d-01d3-49aa-b3dc-64c5e3b98661/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-12 00:14:47,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb91289d-01d3-49aa-b3dc-64c5e3b98661/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:14:47,721 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:14:47,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:14:47,721 INFO L85 PathProgramCache]: Analyzing trace with hash 873684674, now seen corresponding path program 4 times [2023-11-12 00:14:47,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:14:47,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750577327] [2023-11-12 00:14:47,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:14:47,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:14:47,755 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:14:47,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [680309395] [2023-11-12 00:14:47,766 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-12 00:14:47,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:14:47,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb91289d-01d3-49aa-b3dc-64c5e3b98661/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:14:47,768 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb91289d-01d3-49aa-b3dc-64c5e3b98661/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:14:47,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb91289d-01d3-49aa-b3dc-64c5e3b98661/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-12 00:14:47,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 00:14:47,949 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-12 00:14:48,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 00:14:48,113 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-11-12 00:14:48,113 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-12 00:14:48,114 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-11-12 00:14:48,128 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb91289d-01d3-49aa-b3dc-64c5e3b98661/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-12 00:14:48,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb91289d-01d3-49aa-b3dc-64c5e3b98661/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-12 00:14:48,327 INFO L445 BasicCegarLoop]: Path program histogram: [4, 1, 1, 1, 1, 1, 1] [2023-11-12 00:14:48,331 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-11-12 00:14:48,371 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-11-12 00:14:48,372 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-11-12 00:14:48,373 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-11-12 00:14:48,374 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-11-12 00:14:48,375 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-11-12 00:14:48,375 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-11-12 00:14:48,376 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-11-12 00:14:48,377 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-11-12 00:14:48,378 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-11-12 00:14:48,379 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-11-12 00:14:48,380 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-11-12 00:14:48,381 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-11-12 00:14:48,382 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-11-12 00:14:48,383 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-11-12 00:14:48,383 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-11-12 00:14:48,384 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-11-12 00:14:48,385 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-11-12 00:14:48,386 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-11-12 00:14:48,387 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-11-12 00:14:48,387 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-11-12 00:14:48,388 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-11-12 00:14:48,411 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.11 12:14:48 BoogieIcfgContainer [2023-11-12 00:14:48,411 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-12 00:14:48,412 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-12 00:14:48,412 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-12 00:14:48,412 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-12 00:14:48,412 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:14:30" (3/4) ... [2023-11-12 00:14:48,413 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-11-12 00:14:48,425 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-11-12 00:14:48,426 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-11-12 00:14:48,427 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-11-12 00:14:48,427 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-11-12 00:14:48,428 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-11-12 00:14:48,429 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-11-12 00:14:48,430 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-11-12 00:14:48,430 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-11-12 00:14:48,431 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-11-12 00:14:48,431 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-11-12 00:14:48,432 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-11-12 00:14:48,433 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-11-12 00:14:48,433 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-11-12 00:14:48,434 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-11-12 00:14:48,435 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-11-12 00:14:48,435 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-11-12 00:14:48,436 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-11-12 00:14:48,437 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-11-12 00:14:48,437 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-11-12 00:14:48,438 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-11-12 00:14:48,438 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-11-12 00:14:48,516 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb91289d-01d3-49aa-b3dc-64c5e3b98661/bin/utaipan-verify-NcY6lQBIFX/witness.graphml [2023-11-12 00:14:48,517 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-12 00:14:48,517 INFO L158 Benchmark]: Toolchain (without parser) took 19369.21ms. Allocated memory was 176.2MB in the beginning and 308.3MB in the end (delta: 132.1MB). Free memory was 146.6MB in the beginning and 177.5MB in the end (delta: -30.9MB). Peak memory consumption was 101.2MB. Max. memory is 16.1GB. [2023-11-12 00:14:48,518 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 125.8MB. Free memory was 93.1MB in the beginning and 93.0MB in the end (delta: 139.9kB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-12 00:14:48,518 INFO L158 Benchmark]: CACSL2BoogieTranslator took 363.87ms. Allocated memory is still 176.2MB. Free memory was 146.6MB in the beginning and 143.4MB in the end (delta: 3.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-11-12 00:14:48,519 INFO L158 Benchmark]: Boogie Procedure Inliner took 41.21ms. Allocated memory is still 176.2MB. Free memory was 143.4MB in the beginning and 141.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-12 00:14:48,519 INFO L158 Benchmark]: Boogie Preprocessor took 39.14ms. Allocated memory is still 176.2MB. Free memory was 141.3MB in the beginning and 140.4MB in the end (delta: 935.8kB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-12 00:14:48,520 INFO L158 Benchmark]: RCFGBuilder took 410.94ms. Allocated memory is still 176.2MB. Free memory was 140.4MB in the beginning and 127.8MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-11-12 00:14:48,520 INFO L158 Benchmark]: TraceAbstraction took 18400.80ms. Allocated memory was 176.2MB in the beginning and 308.3MB in the end (delta: 132.1MB). Free memory was 127.6MB in the beginning and 184.8MB in the end (delta: -57.2MB). Peak memory consumption was 78.0MB. Max. memory is 16.1GB. [2023-11-12 00:14:48,521 INFO L158 Benchmark]: Witness Printer took 104.92ms. Allocated memory is still 308.3MB. Free memory was 184.8MB in the beginning and 177.5MB in the end (delta: 7.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2023-11-12 00:14:48,523 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 125.8MB. Free memory was 93.1MB in the beginning and 93.0MB in the end (delta: 139.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 363.87ms. Allocated memory is still 176.2MB. Free memory was 146.6MB in the beginning and 143.4MB in the end (delta: 3.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 41.21ms. Allocated memory is still 176.2MB. Free memory was 143.4MB in the beginning and 141.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 39.14ms. Allocated memory is still 176.2MB. Free memory was 141.3MB in the beginning and 140.4MB in the end (delta: 935.8kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 410.94ms. Allocated memory is still 176.2MB. Free memory was 140.4MB in the beginning and 127.8MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 18400.80ms. Allocated memory was 176.2MB in the beginning and 308.3MB in the end (delta: 132.1MB). Free memory was 127.6MB in the beginning and 184.8MB in the end (delta: -57.2MB). Peak memory consumption was 78.0MB. Max. memory is 16.1GB. * Witness Printer took 104.92ms. Allocated memory is still 308.3MB. Free memory was 184.8MB in the beginning and 177.5MB in the end (delta: 7.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 18]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L22] int counter = 0; [L24] int x1, x2; [L25] int y1, y2, y3; [L26] x1 = __VERIFIER_nondet_int() [L27] x2 = __VERIFIER_nondet_int() [L29] CALL assume_abort_if_not(x1 >= 0) VAL [\old(cond)=1, counter=0] [L13] COND FALSE !(!cond) [L29] RET assume_abort_if_not(x1 >= 0) VAL [counter=0, x1=21, x2=11] [L30] CALL assume_abort_if_not(x2 != 0) VAL [\old(cond)=1, counter=0] [L13] COND FALSE !(!cond) [L30] RET assume_abort_if_not(x2 != 0) VAL [counter=0, x1=21, x2=11] [L32] y1 = 0 [L33] y2 = 0 [L34] y3 = x1 VAL [counter=0, x1=21, x2=11, y1=0, y2=0, y3=21] [L36] EXPR counter++ VAL [counter=1, x1=21, x2=11, y1=0, y2=0, y3=21] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, counter=1] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [counter=1, x1=21, x2=11, y1=0, y2=0, y3=21] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=1, x1=21, x2=11, y1=0, y2=1, y3=20] [L36] EXPR counter++ VAL [counter=2, x1=21, x2=11, y1=0, y2=1, y3=20] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, counter=2] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [counter=2, x1=21, x2=11, y1=0, y2=1, y3=20] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=2, x1=21, x2=11, y1=0, y2=2, y3=19] [L36] EXPR counter++ VAL [counter=3, x1=21, x2=11, y1=0, y2=2, y3=19] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, counter=3] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=3] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [counter=3, x1=21, x2=11, y1=0, y2=2, y3=19] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=3, x1=21, x2=11, y1=0, y2=3, y3=18] [L36] EXPR counter++ VAL [counter=4, x1=21, x2=11, y1=0, y2=3, y3=18] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, counter=4] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=4] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [counter=4, x1=21, x2=11, y1=0, y2=3, y3=18] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=4, x1=21, x2=11, y1=0, y2=4, y3=17] [L36] EXPR counter++ VAL [counter=5, x1=21, x2=11, y1=0, y2=4, y3=17] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, counter=5] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [counter=5, x1=21, x2=11, y1=0, y2=4, y3=17] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=5, x1=21, x2=11, y1=0, y2=5, y3=16] [L36] EXPR counter++ VAL [counter=6, x1=21, x2=11, y1=0, y2=5, y3=16] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, counter=6] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=6] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [counter=6, x1=21, x2=11, y1=0, y2=5, y3=16] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=6, x1=21, x2=11, y1=0, y2=6, y3=15] [L36] EXPR counter++ VAL [counter=7, x1=21, x2=11, y1=0, y2=6, y3=15] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, counter=7] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=7] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [counter=7, x1=21, x2=11, y1=0, y2=6, y3=15] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=7, x1=21, x2=11, y1=0, y2=7, y3=14] [L36] EXPR counter++ VAL [counter=8, x1=21, x2=11, y1=0, y2=7, y3=14] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, counter=8] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=8] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [counter=8, x1=21, x2=11, y1=0, y2=7, y3=14] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=8, x1=21, x2=11, y1=0, y2=8, y3=13] [L36] EXPR counter++ VAL [counter=9, x1=21, x2=11, y1=0, y2=8, y3=13] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, counter=9] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=9] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [counter=9, x1=21, x2=11, y1=0, y2=8, y3=13] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=9, x1=21, x2=11, y1=0, y2=9, y3=12] [L36] EXPR counter++ VAL [counter=10, x1=21, x2=11, y1=0, y2=9, y3=12] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, counter=10] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=10] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [counter=10, x1=21, x2=11, y1=0, y2=9, y3=12] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=10, x1=21, x2=11, y1=0, y2=10, y3=11] [L36] EXPR counter++ VAL [counter=11, x1=21, x2=11, y1=0, y2=10, y3=11] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, counter=11] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=11] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [counter=11, x1=21, x2=11, y1=0, y2=10, y3=11] [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=11, x1=21, x2=11, y1=1, y2=0, y3=10] [L36] EXPR counter++ VAL [counter=12, x1=21, x2=11, y1=1, y2=0, y3=10] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, counter=12] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=12] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [counter=12, x1=21, x2=11, y1=1, y2=0, y3=10] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=12, x1=21, x2=11, y1=1, y2=1, y3=9] [L36] EXPR counter++ VAL [counter=13, x1=21, x2=11, y1=1, y2=1, y3=9] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, counter=13] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=13] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [counter=13, x1=21, x2=11, y1=1, y2=1, y3=9] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=13, x1=21, x2=11, y1=1, y2=2, y3=8] [L36] EXPR counter++ VAL [counter=14, x1=21, x2=11, y1=1, y2=2, y3=8] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, counter=14] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=14] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [counter=14, x1=21, x2=11, y1=1, y2=2, y3=8] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=14, x1=21, x2=11, y1=1, y2=3, y3=7] [L36] EXPR counter++ VAL [counter=15, x1=21, x2=11, y1=1, y2=3, y3=7] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, counter=15] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=15] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [counter=15, x1=21, x2=11, y1=1, y2=3, y3=7] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=15, x1=21, x2=11, y1=1, y2=4, y3=6] [L36] EXPR counter++ VAL [counter=16, x1=21, x2=11, y1=1, y2=4, y3=6] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, counter=16] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=16] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [counter=16, x1=21, x2=11, y1=1, y2=4, y3=6] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=16, x1=21, x2=11, y1=1, y2=5, y3=5] [L36] EXPR counter++ VAL [counter=17, x1=21, x2=11, y1=1, y2=5, y3=5] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, counter=17] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=17] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [counter=17, x1=21, x2=11, y1=1, y2=5, y3=5] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=17, x1=21, x2=11, y1=1, y2=6, y3=4] [L36] EXPR counter++ VAL [counter=18, x1=21, x2=11, y1=1, y2=6, y3=4] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, counter=18] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=18] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [counter=18, x1=21, x2=11, y1=1, y2=6, y3=4] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=18, x1=21, x2=11, y1=1, y2=7, y3=3] [L36] EXPR counter++ VAL [counter=19, x1=21, x2=11, y1=1, y2=7, y3=3] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, counter=19] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=19] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [counter=19, x1=21, x2=11, y1=1, y2=7, y3=3] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=19, x1=21, x2=11, y1=1, y2=8, y3=2] [L36] EXPR counter++ VAL [counter=20, x1=21, x2=11, y1=1, y2=8, y3=2] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, counter=20] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=20] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [counter=20, x1=21, x2=11, y1=1, y2=8, y3=2] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=20, x1=21, x2=11, y1=1, y2=9, y3=1] [L36] EXPR counter++ VAL [counter=21, x1=21, x2=11, y1=1, y2=9, y3=1] [L36] COND FALSE !(counter++<20) [L50] CALL __VERIFIER_assert(y1*x2 + y2 == x1) VAL [\old(cond)=0, counter=21] [L16] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, counter=21] [L18] reach_error() VAL [\old(cond)=0, cond=0, counter=21] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 18.3s, OverallIterations: 10, TraceHistogramMax: 21, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 1.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 205 SdHoareTripleChecker+Valid, 0.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 202 mSDsluCounter, 608 SdHoareTripleChecker+Invalid, 0.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 482 mSDsCounter, 34 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 554 IncrementalHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 34 mSolverCounterUnsat, 126 mSDtfsCounter, 554 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 761 GetRequests, 559 SyntacticMatches, 7 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1885 ImplicationChecksByTransitivity, 7.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=173occurred in iteration=9, InterpolantAutomatonStates: 123, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 9 MinimizatonAttempts, 12 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 2.6s InterpolantComputationTime, 474 NumberOfCodeBlocks, 474 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 490 ConstructedInterpolants, 0 QuantifiedInterpolants, 1540 SizeOfPredicates, 28 NumberOfNonLiveVariables, 857 ConjunctsInSsa, 124 ConjunctsInUnsatCore, 15 InterpolantComputations, 3 PerfectInterpolantSequences, 321/1004 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME: 1.0s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 3, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 17, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 14, TOOLS_POST_TIME: 0.3s, TOOLS_POST_CALL_APPLICATIONS: 10, TOOLS_POST_CALL_TIME: 0.3s, TOOLS_POST_RETURN_APPLICATIONS: 6, TOOLS_POST_RETURN_TIME: 0.1s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 30, TOOLS_QUANTIFIERELIM_TIME: 0.7s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.1s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 46, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 10, DOMAIN_JOIN_TIME: 0.1s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 0, DOMAIN_WIDEN_TIME: 0.0s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 0, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 17, DOMAIN_ISBOTTOM_TIME: 0.0s, LOOP_SUMMARIZER_APPLICATIONS: 0, LOOP_SUMMARIZER_CACHE_MISSES: 0, LOOP_SUMMARIZER_OVERALL_TIME: 0.0s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 0, CALL_SUMMARIZER_APPLICATIONS: 6, CALL_SUMMARIZER_CACHE_MISSES: 2, CALL_SUMMARIZER_OVERALL_TIME: 0.0s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 146, DAG_COMPRESSION_RETAINED_NODES: 50, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-11-12 00:14:48,560 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb91289d-01d3-49aa-b3dc-64c5e3b98661/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE