./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 527bcce2 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75da388f-b710-4f8d-b3d2-21e1b1432679/bin/utaipan-verify-QoSU8krkJ5/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75da388f-b710-4f8d-b3d2-21e1b1432679/bin/utaipan-verify-QoSU8krkJ5/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75da388f-b710-4f8d-b3d2-21e1b1432679/bin/utaipan-verify-QoSU8krkJ5/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75da388f-b710-4f8d-b3d2-21e1b1432679/bin/utaipan-verify-QoSU8krkJ5/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75da388f-b710-4f8d-b3d2-21e1b1432679/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75da388f-b710-4f8d-b3d2-21e1b1432679/bin/utaipan-verify-QoSU8krkJ5 --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 942b28ff7c0583b7db8395d2c315e70afc8fe68ba69d39faf867ac75d7628edb --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 19:47:16,179 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 19:47:16,296 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75da388f-b710-4f8d-b3d2-21e1b1432679/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-21 19:47:16,305 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 19:47:16,306 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 19:47:16,355 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 19:47:16,356 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 19:47:16,357 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 19:47:16,358 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 19:47:16,363 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 19:47:16,364 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-21 19:47:16,366 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-21 19:47:16,366 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-21 19:47:16,368 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-21 19:47:16,369 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-21 19:47:16,369 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-21 19:47:16,370 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-21 19:47:16,371 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-21 19:47:16,371 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-21 19:47:16,372 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-21 19:47:16,372 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-21 19:47:16,375 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-21 19:47:16,376 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 19:47:16,377 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-21 19:47:16,377 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 19:47:16,378 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 19:47:16,378 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 19:47:16,379 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 19:47:16,379 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-21 19:47:16,380 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 19:47:16,381 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-21 19:47:16,382 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 19:47:16,382 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-21 19:47:16,383 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 19:47:16,383 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 19:47:16,383 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 19:47:16,384 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 19:47:16,384 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 19:47:16,385 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 19:47:16,385 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 19:47:16,385 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-21 19:47:16,386 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-21 19:47:16,386 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 19:47:16,387 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 19:47:16,387 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-21 19:47:16,388 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-21 19:47:16,388 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 19:47:16,388 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_75da388f-b710-4f8d-b3d2-21e1b1432679/bin/utaipan-verify-QoSU8krkJ5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75da388f-b710-4f8d-b3d2-21e1b1432679/bin/utaipan-verify-QoSU8krkJ5 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 942b28ff7c0583b7db8395d2c315e70afc8fe68ba69d39faf867ac75d7628edb [2023-11-21 19:47:16,744 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 19:47:16,777 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 19:47:16,780 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 19:47:16,783 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 19:47:16,783 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 19:47:16,785 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75da388f-b710-4f8d-b3d2-21e1b1432679/bin/utaipan-verify-QoSU8krkJ5/../../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound2.c [2023-11-21 19:47:19,909 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 19:47:20,207 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 19:47:20,208 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75da388f-b710-4f8d-b3d2-21e1b1432679/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound2.c [2023-11-21 19:47:20,218 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75da388f-b710-4f8d-b3d2-21e1b1432679/bin/utaipan-verify-QoSU8krkJ5/data/95be9e84e/d2265aa139fe4c53ae9c775c238574b9/FLAG93fba14d6 [2023-11-21 19:47:20,238 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75da388f-b710-4f8d-b3d2-21e1b1432679/bin/utaipan-verify-QoSU8krkJ5/data/95be9e84e/d2265aa139fe4c53ae9c775c238574b9 [2023-11-21 19:47:20,244 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 19:47:20,246 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 19:47:20,249 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 19:47:20,249 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 19:47:20,255 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 19:47:20,256 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 07:47:20" (1/1) ... [2023-11-21 19:47:20,257 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a1897b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:47:20, skipping insertion in model container [2023-11-21 19:47:20,257 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 07:47:20" (1/1) ... [2023-11-21 19:47:20,285 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 19:47:20,458 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_75da388f-b710-4f8d-b3d2-21e1b1432679/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound2.c[588,601] [2023-11-21 19:47:20,483 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 19:47:20,495 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 19:47:20,509 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_75da388f-b710-4f8d-b3d2-21e1b1432679/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound2.c[588,601] [2023-11-21 19:47:20,521 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 19:47:20,536 INFO L206 MainTranslator]: Completed translation [2023-11-21 19:47:20,536 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:47:20 WrapperNode [2023-11-21 19:47:20,537 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 19:47:20,538 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 19:47:20,538 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 19:47:20,538 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 19:47:20,546 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:47:20" (1/1) ... [2023-11-21 19:47:20,553 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:47:20" (1/1) ... [2023-11-21 19:47:20,574 INFO L138 Inliner]: procedures = 14, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 48 [2023-11-21 19:47:20,575 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 19:47:20,576 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 19:47:20,576 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 19:47:20,576 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 19:47:20,584 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:47:20" (1/1) ... [2023-11-21 19:47:20,584 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:47:20" (1/1) ... [2023-11-21 19:47:20,586 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:47:20" (1/1) ... [2023-11-21 19:47:20,586 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:47:20" (1/1) ... [2023-11-21 19:47:20,590 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:47:20" (1/1) ... [2023-11-21 19:47:20,593 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:47:20" (1/1) ... [2023-11-21 19:47:20,594 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:47:20" (1/1) ... [2023-11-21 19:47:20,595 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:47:20" (1/1) ... [2023-11-21 19:47:20,597 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 19:47:20,598 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 19:47:20,598 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 19:47:20,598 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 19:47:20,599 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:47:20" (1/1) ... [2023-11-21 19:47:20,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 19:47:20,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75da388f-b710-4f8d-b3d2-21e1b1432679/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:47:20,637 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75da388f-b710-4f8d-b3d2-21e1b1432679/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 19:47:20,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75da388f-b710-4f8d-b3d2-21e1b1432679/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 19:47:20,668 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 19:47:20,668 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-21 19:47:20,668 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 19:47:20,668 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 19:47:20,669 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-21 19:47:20,669 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-21 19:47:20,733 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 19:47:20,736 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 19:47:20,919 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 19:47:20,971 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 19:47:20,972 INFO L308 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-21 19:47:20,974 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 07:47:20 BoogieIcfgContainer [2023-11-21 19:47:20,974 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 19:47:20,977 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 19:47:20,977 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 19:47:20,981 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 19:47:20,981 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 07:47:20" (1/3) ... [2023-11-21 19:47:20,982 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a3bf695 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 07:47:20, skipping insertion in model container [2023-11-21 19:47:20,982 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:47:20" (2/3) ... [2023-11-21 19:47:20,983 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a3bf695 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 07:47:20, skipping insertion in model container [2023-11-21 19:47:20,983 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 07:47:20" (3/3) ... [2023-11-21 19:47:20,984 INFO L112 eAbstractionObserver]: Analyzing ICFG cohencu-ll_valuebound2.c [2023-11-21 19:47:21,006 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 19:47:21,006 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-21 19:47:21,057 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 19:47:21,065 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;@49260734, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 19:47:21,065 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-21 19:47:21,070 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 8 states have (on average 1.5) internal successors, (12), 9 states have internal predecessors, (12), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-21 19:47:21,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-21 19:47:21,077 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:47:21,078 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-21 19:47:21,078 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:47:21,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:47:21,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1070258279, now seen corresponding path program 1 times [2023-11-21 19:47:21,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:47:21,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325590137] [2023-11-21 19:47:21,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:47:21,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:47:21,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:47:21,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:47:21,645 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:47:21,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325590137] [2023-11-21 19:47:21,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325590137] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:47:21,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:47:21,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 19:47:21,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723173742] [2023-11-21 19:47:21,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:47:21,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 19:47:21,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:47:21,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 19:47:21,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 19:47:21,698 INFO L87 Difference]: Start difference. First operand has 22 states, 8 states have (on average 1.5) internal successors, (12), 9 states have internal predecessors, (12), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 5 states, 5 states have (on average 1.0) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:47:21,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:47:21,827 INFO L93 Difference]: Finished difference Result 47 states and 82 transitions. [2023-11-21 19:47:21,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-21 19:47:21,830 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.0) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-11-21 19:47:21,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:47:21,838 INFO L225 Difference]: With dead ends: 47 [2023-11-21 19:47:21,838 INFO L226 Difference]: Without dead ends: 24 [2023-11-21 19:47:21,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-21 19:47:21,846 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 7 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:47:21,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 74 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:47:21,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-11-21 19:47:21,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-11-21 19:47:21,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 10 states have (on average 1.2) internal successors, (12), 11 states have internal predecessors, (12), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-21 19:47:21,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 33 transitions. [2023-11-21 19:47:21,899 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 33 transitions. Word has length 6 [2023-11-21 19:47:21,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:47:21,899 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 33 transitions. [2023-11-21 19:47:21,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.0) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:47:21,900 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 33 transitions. [2023-11-21 19:47:21,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-21 19:47:21,902 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:47:21,902 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:47:21,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 19:47:21,903 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:47:21,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:47:21,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1088770990, now seen corresponding path program 1 times [2023-11-21 19:47:21,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:47:21,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752551871] [2023-11-21 19:47:21,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:47:21,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:47:21,919 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 19:47:21,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1591502823] [2023-11-21 19:47:21,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:47:21,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:47:21,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75da388f-b710-4f8d-b3d2-21e1b1432679/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:47:21,923 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75da388f-b710-4f8d-b3d2-21e1b1432679/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:47:21,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75da388f-b710-4f8d-b3d2-21e1b1432679/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-21 19:47:21,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:47:21,989 INFO L262 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-21 19:47:21,994 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:47:22,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:47:22,077 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 19:47:22,077 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:47:22,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752551871] [2023-11-21 19:47:22,078 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 19:47:22,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591502823] [2023-11-21 19:47:22,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591502823] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:47:22,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:47:22,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-21 19:47:22,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769723683] [2023-11-21 19:47:22,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:47:22,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 19:47:22,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:47:22,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 19:47:22,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 19:47:22,084 INFO L87 Difference]: Start difference. First operand 24 states and 33 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 19:47:22,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:47:22,180 INFO L93 Difference]: Finished difference Result 43 states and 62 transitions. [2023-11-21 19:47:22,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 19:47:22,181 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-11-21 19:47:22,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:47:22,183 INFO L225 Difference]: With dead ends: 43 [2023-11-21 19:47:22,184 INFO L226 Difference]: Without dead ends: 41 [2023-11-21 19:47:22,184 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-21 19:47:22,186 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 6 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:47:22,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 92 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:47:22,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-11-21 19:47:22,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 31. [2023-11-21 19:47:22,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 16 states have internal predecessors, (16), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-21 19:47:22,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 41 transitions. [2023-11-21 19:47:22,211 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 41 transitions. Word has length 11 [2023-11-21 19:47:22,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:47:22,212 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 41 transitions. [2023-11-21 19:47:22,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 19:47:22,213 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 41 transitions. [2023-11-21 19:47:22,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-21 19:47:22,214 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:47:22,214 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:47:22,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75da388f-b710-4f8d-b3d2-21e1b1432679/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-21 19:47:22,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75da388f-b710-4f8d-b3d2-21e1b1432679/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:47:22,441 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:47:22,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:47:22,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1026209031, now seen corresponding path program 1 times [2023-11-21 19:47:22,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:47:22,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210227463] [2023-11-21 19:47:22,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:47:22,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:47:22,467 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 19:47:22,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [865499331] [2023-11-21 19:47:22,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:47:22,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:47:22,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75da388f-b710-4f8d-b3d2-21e1b1432679/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:47:22,470 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75da388f-b710-4f8d-b3d2-21e1b1432679/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:47:22,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75da388f-b710-4f8d-b3d2-21e1b1432679/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-21 19:47:22,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:47:22,527 INFO L262 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-21 19:47:22,529 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:47:22,590 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-21 19:47:22,590 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 19:47:22,590 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:47:22,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210227463] [2023-11-21 19:47:22,591 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 19:47:22,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865499331] [2023-11-21 19:47:22,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865499331] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:47:22,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:47:22,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-21 19:47:22,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262255866] [2023-11-21 19:47:22,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:47:22,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 19:47:22,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:47:22,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 19:47:22,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 19:47:22,594 INFO L87 Difference]: Start difference. First operand 31 states and 41 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 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) [2023-11-21 19:47:22,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:47:22,684 INFO L93 Difference]: Finished difference Result 47 states and 65 transitions. [2023-11-21 19:47:22,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 19:47:22,685 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 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 16 [2023-11-21 19:47:22,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:47:22,686 INFO L225 Difference]: With dead ends: 47 [2023-11-21 19:47:22,687 INFO L226 Difference]: Without dead ends: 45 [2023-11-21 19:47:22,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-21 19:47:22,689 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 6 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:47:22,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 89 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:47:22,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-11-21 19:47:22,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 41. [2023-11-21 19:47:22,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 20 states have internal predecessors, (21), 18 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2023-11-21 19:47:22,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 56 transitions. [2023-11-21 19:47:22,726 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 56 transitions. Word has length 16 [2023-11-21 19:47:22,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:47:22,727 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 56 transitions. [2023-11-21 19:47:22,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 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) [2023-11-21 19:47:22,727 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 56 transitions. [2023-11-21 19:47:22,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-21 19:47:22,729 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:47:22,729 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:47:22,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75da388f-b710-4f8d-b3d2-21e1b1432679/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-21 19:47:22,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75da388f-b710-4f8d-b3d2-21e1b1432679/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:47:22,945 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:47:22,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:47:22,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1104948110, now seen corresponding path program 1 times [2023-11-21 19:47:22,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:47:22,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963929541] [2023-11-21 19:47:22,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:47:22,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:47:22,960 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 19:47:22,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1210510983] [2023-11-21 19:47:22,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:47:22,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:47:22,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75da388f-b710-4f8d-b3d2-21e1b1432679/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:47:22,969 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75da388f-b710-4f8d-b3d2-21e1b1432679/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:47:23,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75da388f-b710-4f8d-b3d2-21e1b1432679/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-21 19:47:23,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:47:23,049 INFO L262 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-21 19:47:23,053 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:47:23,199 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-21 19:47:23,199 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 19:47:23,200 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:47:23,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963929541] [2023-11-21 19:47:23,200 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 19:47:23,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210510983] [2023-11-21 19:47:23,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210510983] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:47:23,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:47:23,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-21 19:47:23,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109085342] [2023-11-21 19:47:23,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:47:23,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 19:47:23,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:47:23,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 19:47:23,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 19:47:23,203 INFO L87 Difference]: Start difference. First operand 41 states and 56 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-21 19:47:23,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:47:23,309 INFO L93 Difference]: Finished difference Result 55 states and 71 transitions. [2023-11-21 19:47:23,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 19:47:23,309 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 21 [2023-11-21 19:47:23,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:47:23,311 INFO L225 Difference]: With dead ends: 55 [2023-11-21 19:47:23,311 INFO L226 Difference]: Without dead ends: 43 [2023-11-21 19:47:23,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-21 19:47:23,313 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 6 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:47:23,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 81 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:47:23,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-11-21 19:47:23,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2023-11-21 19:47:23,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 22 states have internal predecessors, (23), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-11-21 19:47:23,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 54 transitions. [2023-11-21 19:47:23,329 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 54 transitions. Word has length 21 [2023-11-21 19:47:23,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:47:23,330 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 54 transitions. [2023-11-21 19:47:23,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-21 19:47:23,330 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 54 transitions. [2023-11-21 19:47:23,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-21 19:47:23,331 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:47:23,332 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:47:23,358 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75da388f-b710-4f8d-b3d2-21e1b1432679/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-21 19:47:23,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75da388f-b710-4f8d-b3d2-21e1b1432679/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:47:23,551 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:47:23,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:47:23,552 INFO L85 PathProgramCache]: Analyzing trace with hash -700920967, now seen corresponding path program 1 times [2023-11-21 19:47:23,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:47:23,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27357929] [2023-11-21 19:47:23,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:47:23,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:47:23,570 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 19:47:23,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1231548323] [2023-11-21 19:47:23,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:47:23,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:47:23,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75da388f-b710-4f8d-b3d2-21e1b1432679/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:47:23,579 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75da388f-b710-4f8d-b3d2-21e1b1432679/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:47:23,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75da388f-b710-4f8d-b3d2-21e1b1432679/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-21 19:47:23,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:47:23,652 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-21 19:47:23,656 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:47:23,828 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-21 19:47:23,829 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 19:47:24,032 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-21 19:47:24,033 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:47:24,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27357929] [2023-11-21 19:47:24,033 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 19:47:24,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231548323] [2023-11-21 19:47:24,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231548323] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 19:47:24,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2125173948] [2023-11-21 19:47:24,054 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-11-21 19:47:24,054 INFO L166 IcfgInterpreter]: Building call graph [2023-11-21 19:47:24,058 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-21 19:47:24,063 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-21 19:47:24,064 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-21 19:47:26,568 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2023-11-21 19:47:26,576 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-21 19:47:26,853 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '945#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-11-21 19:47:26,854 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-21 19:47:26,854 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 19:47:26,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2023-11-21 19:47:26,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558138019] [2023-11-21 19:47:26,854 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 19:47:26,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-21 19:47:26,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:47:26,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-21 19:47:26,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2023-11-21 19:47:26,856 INFO L87 Difference]: Start difference. First operand 43 states and 54 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 11 states have internal predecessors, (21), 5 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2023-11-21 19:47:27,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:47:27,136 INFO L93 Difference]: Finished difference Result 66 states and 86 transitions. [2023-11-21 19:47:27,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-21 19:47:27,137 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 11 states have internal predecessors, (21), 5 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) Word has length 38 [2023-11-21 19:47:27,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:47:27,138 INFO L225 Difference]: With dead ends: 66 [2023-11-21 19:47:27,139 INFO L226 Difference]: Without dead ends: 64 [2023-11-21 19:47:27,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2023-11-21 19:47:27,140 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 25 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 19:47:27,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 66 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 19:47:27,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-11-21 19:47:27,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 51. [2023-11-21 19:47:27,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 28 states have internal predecessors, (29), 16 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-11-21 19:47:27,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 60 transitions. [2023-11-21 19:47:27,162 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 60 transitions. Word has length 38 [2023-11-21 19:47:27,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:47:27,163 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 60 transitions. [2023-11-21 19:47:27,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 11 states have internal predecessors, (21), 5 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2023-11-21 19:47:27,163 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 60 transitions. [2023-11-21 19:47:27,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-21 19:47:27,165 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:47:27,165 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:47:27,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75da388f-b710-4f8d-b3d2-21e1b1432679/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-21 19:47:27,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75da388f-b710-4f8d-b3d2-21e1b1432679/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:47:27,380 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:47:27,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:47:27,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1757443022, now seen corresponding path program 2 times [2023-11-21 19:47:27,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:47:27,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467179798] [2023-11-21 19:47:27,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:47:27,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:47:27,396 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 19:47:27,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1719914866] [2023-11-21 19:47:27,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-21 19:47:27,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:47:27,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75da388f-b710-4f8d-b3d2-21e1b1432679/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:47:27,400 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75da388f-b710-4f8d-b3d2-21e1b1432679/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:47:27,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75da388f-b710-4f8d-b3d2-21e1b1432679/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-21 19:47:27,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-21 19:47:27,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 19:47:27,458 INFO L262 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-21 19:47:27,465 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:47:27,547 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-11-21 19:47:27,547 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 19:47:27,631 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-11-21 19:47:27,631 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:47:27,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467179798] [2023-11-21 19:47:27,631 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 19:47:27,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719914866] [2023-11-21 19:47:27,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719914866] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 19:47:27,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1706719470] [2023-11-21 19:47:27,635 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-11-21 19:47:27,635 INFO L166 IcfgInterpreter]: Building call graph [2023-11-21 19:47:27,635 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-21 19:47:27,635 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-21 19:47:27,636 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-21 19:47:29,217 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2023-11-21 19:47:29,222 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-21 19:47:29,506 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1400#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-11-21 19:47:29,506 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-21 19:47:29,506 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 19:47:29,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-11-21 19:47:29,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666492046] [2023-11-21 19:47:29,506 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 19:47:29,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-21 19:47:29,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:47:29,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-21 19:47:29,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2023-11-21 19:47:29,508 INFO L87 Difference]: Start difference. First operand 51 states and 60 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 8 states have internal predecessors, (16), 4 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2023-11-21 19:47:29,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:47:29,667 INFO L93 Difference]: Finished difference Result 70 states and 89 transitions. [2023-11-21 19:47:29,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-21 19:47:29,668 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 8 states have internal predecessors, (16), 4 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 43 [2023-11-21 19:47:29,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:47:29,670 INFO L225 Difference]: With dead ends: 70 [2023-11-21 19:47:29,670 INFO L226 Difference]: Without dead ends: 68 [2023-11-21 19:47:29,670 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 111 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2023-11-21 19:47:29,671 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 8 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:47:29,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 161 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:47:29,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-11-21 19:47:29,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 59. [2023-11-21 19:47:29,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 31 states have (on average 1.064516129032258) internal successors, (33), 33 states have internal predecessors, (33), 19 states have call successors, (19), 8 states have call predecessors, (19), 8 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2023-11-21 19:47:29,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 70 transitions. [2023-11-21 19:47:29,694 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 70 transitions. Word has length 43 [2023-11-21 19:47:29,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:47:29,694 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 70 transitions. [2023-11-21 19:47:29,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 8 states have internal predecessors, (16), 4 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2023-11-21 19:47:29,695 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 70 transitions. [2023-11-21 19:47:29,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-11-21 19:47:29,696 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:47:29,697 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:47:29,722 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75da388f-b710-4f8d-b3d2-21e1b1432679/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-21 19:47:29,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75da388f-b710-4f8d-b3d2-21e1b1432679/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-21 19:47:29,918 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:47:29,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:47:29,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1748922073, now seen corresponding path program 3 times [2023-11-21 19:47:29,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:47:29,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388584411] [2023-11-21 19:47:29,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:47:29,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:47:29,936 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 19:47:29,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [685310997] [2023-11-21 19:47:29,944 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-21 19:47:29,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:47:29,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75da388f-b710-4f8d-b3d2-21e1b1432679/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:47:29,946 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75da388f-b710-4f8d-b3d2-21e1b1432679/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:47:29,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75da388f-b710-4f8d-b3d2-21e1b1432679/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-21 19:47:30,015 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-21 19:47:30,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 19:47:30,016 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-21 19:47:30,019 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:47:30,143 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-11-21 19:47:30,144 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 19:47:30,277 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-11-21 19:47:30,277 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:47:30,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388584411] [2023-11-21 19:47:30,278 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 19:47:30,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685310997] [2023-11-21 19:47:30,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685310997] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 19:47:30,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2129927094] [2023-11-21 19:47:30,283 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-11-21 19:47:30,284 INFO L166 IcfgInterpreter]: Building call graph [2023-11-21 19:47:30,284 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-21 19:47:30,284 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-21 19:47:30,285 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-21 19:47:31,859 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2023-11-21 19:47:31,864 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-21 19:47:32,114 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1895#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-11-21 19:47:32,115 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-21 19:47:32,115 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 19:47:32,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2023-11-21 19:47:32,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730233207] [2023-11-21 19:47:32,115 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 19:47:32,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-21 19:47:32,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:47:32,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-21 19:47:32,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2023-11-21 19:47:32,117 INFO L87 Difference]: Start difference. First operand 59 states and 70 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 4 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2023-11-21 19:47:32,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:47:32,421 INFO L93 Difference]: Finished difference Result 82 states and 98 transitions. [2023-11-21 19:47:32,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-21 19:47:32,421 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 4 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 48 [2023-11-21 19:47:32,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:47:32,423 INFO L225 Difference]: With dead ends: 82 [2023-11-21 19:47:32,423 INFO L226 Difference]: Without dead ends: 74 [2023-11-21 19:47:32,424 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 126 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2023-11-21 19:47:32,425 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 8 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 19:47:32,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 147 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 19:47:32,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-11-21 19:47:32,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 68. [2023-11-21 19:47:32,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 40 states have (on average 1.05) internal successors, (42), 42 states have internal predecessors, (42), 16 states have call successors, (16), 11 states have call predecessors, (16), 11 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2023-11-21 19:47:32,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 73 transitions. [2023-11-21 19:47:32,465 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 73 transitions. Word has length 48 [2023-11-21 19:47:32,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:47:32,466 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 73 transitions. [2023-11-21 19:47:32,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 4 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2023-11-21 19:47:32,467 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 73 transitions. [2023-11-21 19:47:32,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-11-21 19:47:32,468 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:47:32,469 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:47:32,484 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75da388f-b710-4f8d-b3d2-21e1b1432679/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-21 19:47:32,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75da388f-b710-4f8d-b3d2-21e1b1432679/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-21 19:47:32,669 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:47:32,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:47:32,670 INFO L85 PathProgramCache]: Analyzing trace with hash -2025080784, now seen corresponding path program 1 times [2023-11-21 19:47:32,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:47:32,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553680108] [2023-11-21 19:47:32,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:47:32,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:47:32,680 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 19:47:32,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [603452679] [2023-11-21 19:47:32,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:47:32,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:47:32,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75da388f-b710-4f8d-b3d2-21e1b1432679/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:47:32,682 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75da388f-b710-4f8d-b3d2-21e1b1432679/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:47:32,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75da388f-b710-4f8d-b3d2-21e1b1432679/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-21 19:47:32,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:47:32,753 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-21 19:47:32,757 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:47:33,055 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 21 proven. 38 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2023-11-21 19:47:33,055 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 19:47:33,977 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 21 proven. 38 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2023-11-21 19:47:33,977 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:47:33,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553680108] [2023-11-21 19:47:33,977 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 19:47:33,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603452679] [2023-11-21 19:47:33,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603452679] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 19:47:33,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1327441995] [2023-11-21 19:47:33,980 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-11-21 19:47:33,980 INFO L166 IcfgInterpreter]: Building call graph [2023-11-21 19:47:33,981 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-21 19:47:33,981 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-21 19:47:33,981 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-21 19:47:35,440 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2023-11-21 19:47:35,445 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-21 19:47:36,033 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2519#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-11-21 19:47:36,034 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-21 19:47:36,034 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 19:47:36,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2023-11-21 19:47:36,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548709553] [2023-11-21 19:47:36,034 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 19:47:36,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-21 19:47:36,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:47:36,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-21 19:47:36,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2023-11-21 19:47:36,036 INFO L87 Difference]: Start difference. First operand 68 states and 73 transitions. Second operand has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 7 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) [2023-11-21 19:47:36,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:47:36,445 INFO L93 Difference]: Finished difference Result 97 states and 112 transitions. [2023-11-21 19:47:36,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-21 19:47:36,446 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 7 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) Word has length 64 [2023-11-21 19:47:36,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:47:36,449 INFO L225 Difference]: With dead ends: 97 [2023-11-21 19:47:36,449 INFO L226 Difference]: Without dead ends: 95 [2023-11-21 19:47:36,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 169 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2023-11-21 19:47:36,451 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 16 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-21 19:47:36,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 91 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-21 19:47:36,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-11-21 19:47:36,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 93. [2023-11-21 19:47:36,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 52 states have (on average 1.0769230769230769) internal successors, (56), 55 states have internal predecessors, (56), 26 states have call successors, (26), 14 states have call predecessors, (26), 14 states have return successors, (25), 23 states have call predecessors, (25), 25 states have call successors, (25) [2023-11-21 19:47:36,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 107 transitions. [2023-11-21 19:47:36,495 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 107 transitions. Word has length 64 [2023-11-21 19:47:36,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:47:36,496 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 107 transitions. [2023-11-21 19:47:36,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 7 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) [2023-11-21 19:47:36,496 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 107 transitions. [2023-11-21 19:47:36,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-21 19:47:36,498 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:47:36,498 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:47:36,529 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75da388f-b710-4f8d-b3d2-21e1b1432679/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-21 19:47:36,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75da388f-b710-4f8d-b3d2-21e1b1432679/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-21 19:47:36,724 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:47:36,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:47:36,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1309118309, now seen corresponding path program 1 times [2023-11-21 19:47:36,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:47:36,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934751193] [2023-11-21 19:47:36,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:47:36,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:47:36,747 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 19:47:36,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [36791554] [2023-11-21 19:47:36,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:47:36,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:47:36,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75da388f-b710-4f8d-b3d2-21e1b1432679/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:47:36,749 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75da388f-b710-4f8d-b3d2-21e1b1432679/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:47:36,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75da388f-b710-4f8d-b3d2-21e1b1432679/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-21 19:47:36,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:47:36,826 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-21 19:47:36,830 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:47:37,087 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 23 proven. 41 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2023-11-21 19:47:37,087 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 19:47:37,492 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 23 proven. 41 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2023-11-21 19:47:37,493 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:47:37,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934751193] [2023-11-21 19:47:37,493 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 19:47:37,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36791554] [2023-11-21 19:47:37,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36791554] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 19:47:37,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [379047603] [2023-11-21 19:47:37,496 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-11-21 19:47:37,496 INFO L166 IcfgInterpreter]: Building call graph [2023-11-21 19:47:37,496 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-21 19:47:37,496 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-21 19:47:37,497 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-21 19:47:38,781 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2023-11-21 19:47:38,786 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-21 19:47:39,075 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3234#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-11-21 19:47:39,075 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-21 19:47:39,075 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 19:47:39,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2023-11-21 19:47:39,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561696504] [2023-11-21 19:47:39,075 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 19:47:39,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-21 19:47:39,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:47:39,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-21 19:47:39,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2023-11-21 19:47:39,078 INFO L87 Difference]: Start difference. First operand 93 states and 107 transitions. Second operand has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 7 states have call successors, (26), 3 states have call predecessors, (26), 2 states have return successors, (24), 6 states have call predecessors, (24), 7 states have call successors, (24) [2023-11-21 19:47:39,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:47:39,495 INFO L93 Difference]: Finished difference Result 114 states and 125 transitions. [2023-11-21 19:47:39,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-21 19:47:39,496 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 7 states have call successors, (26), 3 states have call predecessors, (26), 2 states have return successors, (24), 6 states have call predecessors, (24), 7 states have call successors, (24) Word has length 69 [2023-11-21 19:47:39,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:47:39,498 INFO L225 Difference]: With dead ends: 114 [2023-11-21 19:47:39,498 INFO L226 Difference]: Without dead ends: 94 [2023-11-21 19:47:39,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 184 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2023-11-21 19:47:39,500 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 14 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-21 19:47:39,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 124 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-21 19:47:39,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-11-21 19:47:39,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2023-11-21 19:47:39,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 56 states have internal predecessors, (57), 23 states have call successors, (23), 15 states have call predecessors, (23), 15 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2023-11-21 19:47:39,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 102 transitions. [2023-11-21 19:47:39,536 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 102 transitions. Word has length 69 [2023-11-21 19:47:39,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:47:39,537 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 102 transitions. [2023-11-21 19:47:39,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 7 states have call successors, (26), 3 states have call predecessors, (26), 2 states have return successors, (24), 6 states have call predecessors, (24), 7 states have call successors, (24) [2023-11-21 19:47:39,537 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 102 transitions. [2023-11-21 19:47:39,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-11-21 19:47:39,539 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:47:39,539 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1] [2023-11-21 19:47:39,564 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75da388f-b710-4f8d-b3d2-21e1b1432679/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-21 19:47:39,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75da388f-b710-4f8d-b3d2-21e1b1432679/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:47:39,760 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:47:39,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:47:39,761 INFO L85 PathProgramCache]: Analyzing trace with hash 33509209, now seen corresponding path program 4 times [2023-11-21 19:47:39,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:47:39,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339936643] [2023-11-21 19:47:39,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:47:39,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:47:39,791 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 19:47:39,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1062047935] [2023-11-21 19:47:39,791 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-21 19:47:39,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:47:39,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75da388f-b710-4f8d-b3d2-21e1b1432679/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:47:39,793 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75da388f-b710-4f8d-b3d2-21e1b1432679/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:47:39,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75da388f-b710-4f8d-b3d2-21e1b1432679/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-21 19:47:39,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:47:39,863 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-21 19:47:39,866 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:47:40,064 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 23 proven. 49 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2023-11-21 19:47:40,064 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 19:47:40,312 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 23 proven. 49 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2023-11-21 19:47:40,312 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:47:40,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339936643] [2023-11-21 19:47:40,312 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 19:47:40,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062047935] [2023-11-21 19:47:40,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062047935] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 19:47:40,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1437947661] [2023-11-21 19:47:40,315 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-11-21 19:47:40,315 INFO L166 IcfgInterpreter]: Building call graph [2023-11-21 19:47:40,316 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-21 19:47:40,316 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-21 19:47:40,316 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-21 19:47:41,565 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2023-11-21 19:47:41,569 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-21 19:47:41,850 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3976#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-11-21 19:47:41,850 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-21 19:47:41,850 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 19:47:41,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2023-11-21 19:47:41,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509305152] [2023-11-21 19:47:41,851 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 19:47:41,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-21 19:47:41,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:47:41,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-21 19:47:41,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2023-11-21 19:47:41,852 INFO L87 Difference]: Start difference. First operand 94 states and 102 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 13 states have internal predecessors, (25), 7 states have call successors, (26), 3 states have call predecessors, (26), 2 states have return successors, (24), 6 states have call predecessors, (24), 7 states have call successors, (24) [2023-11-21 19:47:44,996 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.84s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-21 19:47:45,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:47:45,083 INFO L93 Difference]: Finished difference Result 100 states and 107 transitions. [2023-11-21 19:47:45,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-21 19:47:45,083 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 13 states have internal predecessors, (25), 7 states have call successors, (26), 3 states have call predecessors, (26), 2 states have return successors, (24), 6 states have call predecessors, (24), 7 states have call successors, (24) Word has length 70 [2023-11-21 19:47:45,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:47:45,085 INFO L225 Difference]: With dead ends: 100 [2023-11-21 19:47:45,085 INFO L226 Difference]: Without dead ends: 98 [2023-11-21 19:47:45,086 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 187 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2023-11-21 19:47:45,087 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 20 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 61 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:47:45,088 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 145 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 222 Invalid, 1 Unknown, 0 Unchecked, 3.1s Time] [2023-11-21 19:47:45,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2023-11-21 19:47:45,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2023-11-21 19:47:45,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 59 states have internal predecessors, (60), 23 states have call successors, (23), 16 states have call predecessors, (23), 16 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2023-11-21 19:47:45,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 105 transitions. [2023-11-21 19:47:45,130 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 105 transitions. Word has length 70 [2023-11-21 19:47:45,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:47:45,131 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 105 transitions. [2023-11-21 19:47:45,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 13 states have internal predecessors, (25), 7 states have call successors, (26), 3 states have call predecessors, (26), 2 states have return successors, (24), 6 states have call predecessors, (24), 7 states have call successors, (24) [2023-11-21 19:47:45,131 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 105 transitions. [2023-11-21 19:47:45,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2023-11-21 19:47:45,134 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:47:45,134 INFO L195 NwaCegarLoop]: trace histogram [22, 21, 21, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:47:45,164 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75da388f-b710-4f8d-b3d2-21e1b1432679/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-21 19:47:45,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75da388f-b710-4f8d-b3d2-21e1b1432679/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-21 19:47:45,350 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:47:45,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:47:45,351 INFO L85 PathProgramCache]: Analyzing trace with hash 74939536, now seen corresponding path program 2 times [2023-11-21 19:47:45,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:47:45,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720644445] [2023-11-21 19:47:45,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:47:45,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:47:45,365 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 19:47:45,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2115081586] [2023-11-21 19:47:45,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-21 19:47:45,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:47:45,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75da388f-b710-4f8d-b3d2-21e1b1432679/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:47:45,367 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75da388f-b710-4f8d-b3d2-21e1b1432679/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:47:45,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75da388f-b710-4f8d-b3d2-21e1b1432679/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-21 19:47:45,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-21 19:47:45,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 19:47:45,486 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-21 19:47:45,490 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:47:45,770 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 107 proven. 16 refuted. 0 times theorem prover too weak. 801 trivial. 0 not checked. [2023-11-21 19:47:45,770 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 19:47:45,825 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:47:45,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720644445] [2023-11-21 19:47:45,826 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 19:47:45,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115081586] [2023-11-21 19:47:45,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115081586] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:47:45,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [329127418] [2023-11-21 19:47:45,833 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-11-21 19:47:45,833 INFO L166 IcfgInterpreter]: Building call graph [2023-11-21 19:47:45,833 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-21 19:47:45,834 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-21 19:47:45,834 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-21 19:47:46,939 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2023-11-21 19:47:46,943 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-21 19:47:47,336 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4655#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-11-21 19:47:47,336 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-21 19:47:47,336 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-21 19:47:47,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2023-11-21 19:47:47,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745272345] [2023-11-21 19:47:47,336 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-21 19:47:47,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-21 19:47:47,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:47:47,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-21 19:47:47,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2023-11-21 19:47:47,338 INFO L87 Difference]: Start difference. First operand 98 states and 105 transitions. Second operand has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2023-11-21 19:47:47,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:47:47,484 INFO L93 Difference]: Finished difference Result 104 states and 110 transitions. [2023-11-21 19:47:47,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-21 19:47:47,484 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 118 [2023-11-21 19:47:47,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:47:47,486 INFO L225 Difference]: With dead ends: 104 [2023-11-21 19:47:47,486 INFO L226 Difference]: Without dead ends: 100 [2023-11-21 19:47:47,486 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 220 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2023-11-21 19:47:47,487 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 15 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:47:47,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 57 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:47:47,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-11-21 19:47:47,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2023-11-21 19:47:47,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 60 states have (on average 1.0166666666666666) internal successors, (61), 60 states have internal predecessors, (61), 23 states have call successors, (23), 17 states have call predecessors, (23), 16 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2023-11-21 19:47:47,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 106 transitions. [2023-11-21 19:47:47,525 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 106 transitions. Word has length 118 [2023-11-21 19:47:47,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:47:47,526 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 106 transitions. [2023-11-21 19:47:47,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2023-11-21 19:47:47,526 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 106 transitions. [2023-11-21 19:47:47,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-11-21 19:47:47,528 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:47:47,528 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 22, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:47:47,533 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75da388f-b710-4f8d-b3d2-21e1b1432679/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-21 19:47:47,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75da388f-b710-4f8d-b3d2-21e1b1432679/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-21 19:47:47,732 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:47:47,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:47:47,733 INFO L85 PathProgramCache]: Analyzing trace with hash -782735301, now seen corresponding path program 2 times [2023-11-21 19:47:47,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:47:47,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472330936] [2023-11-21 19:47:47,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:47:47,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:47:47,745 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 19:47:47,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1871763397] [2023-11-21 19:47:47,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-21 19:47:47,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:47:47,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75da388f-b710-4f8d-b3d2-21e1b1432679/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:47:47,747 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75da388f-b710-4f8d-b3d2-21e1b1432679/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:47:47,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75da388f-b710-4f8d-b3d2-21e1b1432679/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-21 19:47:47,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-21 19:47:47,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 19:47:47,863 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-21 19:47:47,867 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:47:48,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 181 proven. 69 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2023-11-21 19:47:48,367 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 19:47:49,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 148 proven. 39 refuted. 0 times theorem prover too weak. 823 trivial. 0 not checked. [2023-11-21 19:47:49,170 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:47:49,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472330936] [2023-11-21 19:47:49,170 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 19:47:49,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871763397] [2023-11-21 19:47:49,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871763397] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 19:47:49,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1867538548] [2023-11-21 19:47:49,173 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-11-21 19:47:49,173 INFO L166 IcfgInterpreter]: Building call graph [2023-11-21 19:47:49,174 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-21 19:47:49,174 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-21 19:47:49,174 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-21 19:47:50,441 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2023-11-21 19:47:50,447 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-21 19:47:50,923 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5708#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-11-21 19:47:50,923 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-21 19:47:50,923 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 19:47:50,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2023-11-21 19:47:50,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447701620] [2023-11-21 19:47:50,924 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 19:47:50,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-21 19:47:50,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:47:50,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-21 19:47:50,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2023-11-21 19:47:50,926 INFO L87 Difference]: Start difference. First operand 100 states and 106 transitions. Second operand has 17 states, 15 states have (on average 1.8) internal successors, (27), 13 states have internal predecessors, (27), 9 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (31), 8 states have call predecessors, (31), 9 states have call successors, (31) [2023-11-21 19:47:51,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:47:51,258 INFO L93 Difference]: Finished difference Result 100 states and 106 transitions. [2023-11-21 19:47:51,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-21 19:47:51,259 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 1.8) internal successors, (27), 13 states have internal predecessors, (27), 9 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (31), 8 states have call predecessors, (31), 9 states have call successors, (31) Word has length 123 [2023-11-21 19:47:51,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:47:51,259 INFO L225 Difference]: With dead ends: 100 [2023-11-21 19:47:51,259 INFO L226 Difference]: Without dead ends: 0 [2023-11-21 19:47:51,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 342 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2023-11-21 19:47:51,261 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 15 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 19:47:51,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 69 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 19:47:51,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-11-21 19:47:51,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-11-21 19:47:51,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:47:51,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-11-21 19:47:51,263 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 123 [2023-11-21 19:47:51,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:47:51,263 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-21 19:47:51,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 1.8) internal successors, (27), 13 states have internal predecessors, (27), 9 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (31), 8 states have call predecessors, (31), 9 states have call successors, (31) [2023-11-21 19:47:51,263 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-11-21 19:47:51,263 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-11-21 19:47:51,266 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-11-21 19:47:51,276 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75da388f-b710-4f8d-b3d2-21e1b1432679/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-21 19:47:51,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75da388f-b710-4f8d-b3d2-21e1b1432679/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-21 19:47:51,473 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-11-21 19:47:54,964 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-11-21 19:47:54,964 INFO L895 garLoopResultBuilder]: At program point L33-2(lines 33 46) the Hoare annotation is: (let ((.cse2 (* |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1|))) (let ((.cse0 (* 3 |ULTIMATE.start_main_~n~0#1|)) (.cse1 (* 3 .cse2)) (.cse3 (* |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1|))) (and (<= |ULTIMATE.start_main_~a~0#1| 2) (= |ULTIMATE.start_main_~y~0#1| (+ .cse0 .cse1 1)) (<= |ULTIMATE.start_main_~n~0#1| (+ |ULTIMATE.start_main_~a~0#1| 1)) (<= 0 |ULTIMATE.start_main_~a~0#1|) (= (+ (* 6 .cse2) (* |ULTIMATE.start_main_~n~0#1| 12) .cse3 8) (+ (* 2 |ULTIMATE.start_main_~y~0#1|) |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~z~0#1|)) (= (+ .cse0 .cse1 .cse3 1) (+ |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~y~0#1|))))) [2023-11-21 19:47:54,964 INFO L895 garLoopResultBuilder]: At program point L33-3(lines 33 46) the Hoare annotation is: (let ((.cse0 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~z~0#1|)) (.cse2 (* |ULTIMATE.start_main_~x~0#1| 18)) (.cse1 (* 2 |ULTIMATE.start_main_~z~0#1|))) (and (= (+ .cse0 .cse1) (+ 6 (* |ULTIMATE.start_main_~y~0#1| 12) .cse2)) (= (+ .cse0 6 (* |ULTIMATE.start_main_~z~0#1| |ULTIMATE.start_main_~z~0#1|)) (+ (* |ULTIMATE.start_main_~z~0#1| 4) .cse2 (* |ULTIMATE.start_main_~y~0#1| 24))) (= |ULTIMATE.start_main_~z~0#1| (+ 6 (* 6 |ULTIMATE.start_main_~n~0#1|))) (= (+ (* 2 |ULTIMATE.start_main_~y~0#1|) (* 6 |ULTIMATE.start_main_~a~0#1|) 10) (+ (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~z~0#1|) .cse1)))) [2023-11-21 19:47:54,964 INFO L895 garLoopResultBuilder]: At program point L52(line 52) the Hoare annotation is: (and (= |ULTIMATE.start_main_~y~0#1| (+ (* 3 |ULTIMATE.start_main_~n~0#1|) (* 3 (* |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1|)) 1)) (= (+ (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~z~0#1|) 6 (* |ULTIMATE.start_main_~z~0#1| |ULTIMATE.start_main_~z~0#1|)) (+ (* |ULTIMATE.start_main_~z~0#1| 4) (* |ULTIMATE.start_main_~x~0#1| 18) (* |ULTIMATE.start_main_~y~0#1| 24))) (= |ULTIMATE.start_main_~z~0#1| (+ 6 (* 6 |ULTIMATE.start_main_~n~0#1|)))) [2023-11-21 19:47:54,965 INFO L895 garLoopResultBuilder]: At program point L50(line 50) the Hoare annotation is: (and (= |ULTIMATE.start_main_~y~0#1| (+ (* 3 |ULTIMATE.start_main_~n~0#1|) (* 3 (* |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1|)) 1)) (= (+ (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~z~0#1|) 6 (* |ULTIMATE.start_main_~z~0#1| |ULTIMATE.start_main_~z~0#1|)) (+ (* |ULTIMATE.start_main_~z~0#1| 4) (* |ULTIMATE.start_main_~x~0#1| 18) (* |ULTIMATE.start_main_~y~0#1| 24))) (= |ULTIMATE.start_main_~z~0#1| (+ 6 (* 6 |ULTIMATE.start_main_~n~0#1|)))) [2023-11-21 19:47:54,965 INFO L895 garLoopResultBuilder]: At program point L48(line 48) the Hoare annotation is: (let ((.cse0 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~z~0#1|)) (.cse2 (* |ULTIMATE.start_main_~x~0#1| 18)) (.cse1 (* 2 |ULTIMATE.start_main_~z~0#1|))) (and (= (+ .cse0 .cse1) (+ 6 (* |ULTIMATE.start_main_~y~0#1| 12) .cse2)) (= (+ .cse0 6 (* |ULTIMATE.start_main_~z~0#1| |ULTIMATE.start_main_~z~0#1|)) (+ (* |ULTIMATE.start_main_~z~0#1| 4) .cse2 (* |ULTIMATE.start_main_~y~0#1| 24))) (= |ULTIMATE.start_main_~z~0#1| (+ 6 (* 6 |ULTIMATE.start_main_~n~0#1|))) (= (+ (* 2 |ULTIMATE.start_main_~y~0#1|) (* 6 |ULTIMATE.start_main_~a~0#1|) 10) (+ (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~z~0#1|) .cse1)))) [2023-11-21 19:47:54,965 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line -1) no Hoare annotation was computed. [2023-11-21 19:47:54,965 INFO L899 garLoopResultBuilder]: For program point L38(lines 33 46) no Hoare annotation was computed. [2023-11-21 19:47:54,965 INFO L895 garLoopResultBuilder]: At program point L36(line 36) the Hoare annotation is: (let ((.cse0 (* |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1|)) (.cse1 (* |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1|))) (and (<= |ULTIMATE.start_main_~a~0#1| 2) (= |ULTIMATE.start_main_~z~0#1| (+ 6 (* 6 |ULTIMATE.start_main_~n~0#1|))) (<= |ULTIMATE.start_main_~n~0#1| (+ |ULTIMATE.start_main_~a~0#1| 1)) (<= 0 |ULTIMATE.start_main_~a~0#1|) (= (+ (* 6 .cse0) (* |ULTIMATE.start_main_~n~0#1| 12) .cse1 8) (+ (* 2 |ULTIMATE.start_main_~y~0#1|) |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~z~0#1|)) (= (+ (* 3 |ULTIMATE.start_main_~n~0#1|) (* 3 .cse0) .cse1 1) (+ |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~y~0#1|)))) [2023-11-21 19:47:54,965 INFO L895 garLoopResultBuilder]: At program point L34(line 34) the Hoare annotation is: (let ((.cse2 (* |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1|))) (let ((.cse0 (* 3 |ULTIMATE.start_main_~n~0#1|)) (.cse1 (* 3 .cse2)) (.cse3 (* |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1|))) (and (<= |ULTIMATE.start_main_~a~0#1| 2) (= |ULTIMATE.start_main_~y~0#1| (+ .cse0 .cse1 1)) (<= |ULTIMATE.start_main_~n~0#1| (+ |ULTIMATE.start_main_~a~0#1| 1)) (<= 0 |ULTIMATE.start_main_~a~0#1|) (= (+ (* 6 .cse2) (* |ULTIMATE.start_main_~n~0#1| 12) .cse3 8) (+ (* 2 |ULTIMATE.start_main_~y~0#1|) |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~z~0#1|)) (= (+ .cse0 .cse1 .cse3 1) (+ |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~y~0#1|))))) [2023-11-21 19:47:54,965 INFO L895 garLoopResultBuilder]: At program point L34-1(line 34) the Hoare annotation is: (let ((.cse2 (* |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1|))) (let ((.cse0 (* 3 |ULTIMATE.start_main_~n~0#1|)) (.cse1 (* 3 .cse2)) (.cse3 (* |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1|))) (and (<= |ULTIMATE.start_main_~a~0#1| 2) (= |ULTIMATE.start_main_~y~0#1| (+ .cse0 .cse1 1)) (<= |ULTIMATE.start_main_~n~0#1| (+ |ULTIMATE.start_main_~a~0#1| 1)) (<= 0 |ULTIMATE.start_main_~a~0#1|) (= (+ (* 6 .cse2) (* |ULTIMATE.start_main_~n~0#1| 12) .cse3 8) (+ (* 2 |ULTIMATE.start_main_~y~0#1|) |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~z~0#1|)) (= (+ .cse0 .cse1 .cse3 1) (+ |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~y~0#1|))))) [2023-11-21 19:47:54,966 INFO L899 garLoopResultBuilder]: For program point L53(line 53) no Hoare annotation was computed. [2023-11-21 19:47:54,966 INFO L895 garLoopResultBuilder]: At program point L51(line 51) the Hoare annotation is: (and (= |ULTIMATE.start_main_~y~0#1| (+ (* 3 |ULTIMATE.start_main_~n~0#1|) (* 3 (* |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1|)) 1)) (= (+ (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~z~0#1|) 6 (* |ULTIMATE.start_main_~z~0#1| |ULTIMATE.start_main_~z~0#1|)) (+ (* |ULTIMATE.start_main_~z~0#1| 4) (* |ULTIMATE.start_main_~x~0#1| 18) (* |ULTIMATE.start_main_~y~0#1| 24))) (= |ULTIMATE.start_main_~z~0#1| (+ 6 (* 6 |ULTIMATE.start_main_~n~0#1|)))) [2023-11-21 19:47:54,966 INFO L895 garLoopResultBuilder]: At program point L49(line 49) the Hoare annotation is: (and (= |ULTIMATE.start_main_~y~0#1| (+ (* 3 |ULTIMATE.start_main_~n~0#1|) (* 3 (* |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1|)) 1)) (= (+ (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~z~0#1|) 6 (* |ULTIMATE.start_main_~z~0#1| |ULTIMATE.start_main_~z~0#1|)) (+ (* |ULTIMATE.start_main_~z~0#1| 4) (* |ULTIMATE.start_main_~x~0#1| 18) (* |ULTIMATE.start_main_~y~0#1| 24))) (= |ULTIMATE.start_main_~z~0#1| (+ 6 (* 6 |ULTIMATE.start_main_~n~0#1|))) (= (+ (* 2 |ULTIMATE.start_main_~y~0#1|) (* 6 |ULTIMATE.start_main_~a~0#1|) 10) (+ (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~z~0#1|) (* 2 |ULTIMATE.start_main_~z~0#1|)))) [2023-11-21 19:47:54,966 INFO L895 garLoopResultBuilder]: At program point L37(line 37) the Hoare annotation is: (let ((.cse0 (* |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1|)) (.cse1 (* |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1|))) (and (<= |ULTIMATE.start_main_~a~0#1| 2) (= |ULTIMATE.start_main_~z~0#1| (+ 6 (* 6 |ULTIMATE.start_main_~n~0#1|))) (<= |ULTIMATE.start_main_~n~0#1| (+ |ULTIMATE.start_main_~a~0#1| 1)) (<= 0 |ULTIMATE.start_main_~a~0#1|) (= (+ (* 6 .cse0) (* |ULTIMATE.start_main_~n~0#1| 12) .cse1 8) (+ (* 2 |ULTIMATE.start_main_~y~0#1|) |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~z~0#1|)) (= (+ (* 3 |ULTIMATE.start_main_~n~0#1|) (* 3 .cse0) .cse1 1) (+ |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~y~0#1|)))) [2023-11-21 19:47:54,966 INFO L895 garLoopResultBuilder]: At program point L35(line 35) the Hoare annotation is: (let ((.cse2 (* |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1|))) (let ((.cse0 (* 3 |ULTIMATE.start_main_~n~0#1|)) (.cse1 (* 3 .cse2)) (.cse3 (* |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1|))) (and (<= |ULTIMATE.start_main_~a~0#1| 2) (= |ULTIMATE.start_main_~y~0#1| (+ .cse0 .cse1 1)) (<= |ULTIMATE.start_main_~n~0#1| (+ |ULTIMATE.start_main_~a~0#1| 1)) (<= 0 |ULTIMATE.start_main_~a~0#1|) (= (+ (* 6 .cse2) (* |ULTIMATE.start_main_~n~0#1| 12) .cse3 8) (+ (* 2 |ULTIMATE.start_main_~y~0#1|) |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~z~0#1|)) (= (+ .cse0 .cse1 .cse3 1) (+ |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~y~0#1|))))) [2023-11-21 19:47:54,966 INFO L899 garLoopResultBuilder]: For program point L16(lines 16 17) no Hoare annotation was computed. [2023-11-21 19:47:54,966 INFO L899 garLoopResultBuilder]: For program point L15(lines 15 18) no Hoare annotation was computed. [2023-11-21 19:47:54,966 INFO L899 garLoopResultBuilder]: For program point L15-2(lines 14 20) no Hoare annotation was computed. [2023-11-21 19:47:54,967 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 14 20) no Hoare annotation was computed. [2023-11-21 19:47:54,967 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 14 20) the Hoare annotation is: true [2023-11-21 19:47:54,967 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2023-11-21 19:47:54,970 INFO L445 BasicCegarLoop]: Path program histogram: [4, 2, 2, 1, 1, 1, 1] [2023-11-21 19:47:54,972 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-21 19:47:54,984 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.11 07:47:54 BoogieIcfgContainer [2023-11-21 19:47:54,984 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-21 19:47:54,985 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-21 19:47:54,985 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-21 19:47:54,985 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-21 19:47:54,986 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 07:47:20" (3/4) ... [2023-11-21 19:47:54,988 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-11-21 19:47:54,991 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2023-11-21 19:47:54,996 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2023-11-21 19:47:54,996 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2023-11-21 19:47:54,996 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2023-11-21 19:47:54,997 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-11-21 19:47:55,084 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75da388f-b710-4f8d-b3d2-21e1b1432679/bin/utaipan-verify-QoSU8krkJ5/witness.graphml [2023-11-21 19:47:55,085 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75da388f-b710-4f8d-b3d2-21e1b1432679/bin/utaipan-verify-QoSU8krkJ5/witness.yml [2023-11-21 19:47:55,085 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-21 19:47:55,086 INFO L158 Benchmark]: Toolchain (without parser) took 34840.09ms. Allocated memory was 201.3MB in the beginning and 522.2MB in the end (delta: 320.9MB). Free memory was 167.1MB in the beginning and 316.1MB in the end (delta: -148.9MB). Peak memory consumption was 175.1MB. Max. memory is 16.1GB. [2023-11-21 19:47:55,086 INFO L158 Benchmark]: CDTParser took 0.34ms. Allocated memory is still 155.2MB. Free memory was 96.5MB in the beginning and 96.3MB in the end (delta: 241.3kB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-21 19:47:55,086 INFO L158 Benchmark]: CACSL2BoogieTranslator took 287.97ms. Allocated memory is still 201.3MB. Free memory was 167.1MB in the beginning and 155.6MB in the end (delta: 11.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-11-21 19:47:55,087 INFO L158 Benchmark]: Boogie Procedure Inliner took 37.32ms. Allocated memory is still 201.3MB. Free memory was 155.6MB in the beginning and 154.5MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-21 19:47:55,087 INFO L158 Benchmark]: Boogie Preprocessor took 21.41ms. Allocated memory is still 201.3MB. Free memory was 154.5MB in the beginning and 153.5MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-21 19:47:55,088 INFO L158 Benchmark]: RCFGBuilder took 376.22ms. Allocated memory is still 201.3MB. Free memory was 153.5MB in the beginning and 138.8MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2023-11-21 19:47:55,088 INFO L158 Benchmark]: TraceAbstraction took 34007.87ms. Allocated memory was 201.3MB in the beginning and 522.2MB in the end (delta: 320.9MB). Free memory was 137.8MB in the beginning and 320.3MB in the end (delta: -182.5MB). Peak memory consumption was 284.1MB. Max. memory is 16.1GB. [2023-11-21 19:47:55,089 INFO L158 Benchmark]: Witness Printer took 100.00ms. Allocated memory is still 522.2MB. Free memory was 320.3MB in the beginning and 316.1MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-21 19:47:55,091 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34ms. Allocated memory is still 155.2MB. Free memory was 96.5MB in the beginning and 96.3MB in the end (delta: 241.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 287.97ms. Allocated memory is still 201.3MB. Free memory was 167.1MB in the beginning and 155.6MB in the end (delta: 11.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 37.32ms. Allocated memory is still 201.3MB. Free memory was 155.6MB in the beginning and 154.5MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 21.41ms. Allocated memory is still 201.3MB. Free memory was 154.5MB in the beginning and 153.5MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 376.22ms. Allocated memory is still 201.3MB. Free memory was 153.5MB in the beginning and 138.8MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 34007.87ms. Allocated memory was 201.3MB in the beginning and 522.2MB in the end (delta: 320.9MB). Free memory was 137.8MB in the beginning and 320.3MB in the end (delta: -182.5MB). Peak memory consumption was 284.1MB. Max. memory is 16.1GB. * Witness Printer took 100.00ms. Allocated memory is still 522.2MB. Free memory was 320.3MB in the beginning and 316.1MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 17]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 33.9s, OverallIterations: 12, TraceHistogramMax: 23, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 5.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 3.5s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 197 SdHoareTripleChecker+Valid, 4.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 146 mSDsluCounter, 1196 SdHoareTripleChecker+Invalid, 4.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 934 mSDsCounter, 281 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1200 IncrementalHoareTripleChecker+Invalid, 1482 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 281 mSolverCounterUnsat, 262 mSDtfsCounter, 1200 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1670 GetRequests, 1469 SyntacticMatches, 23 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1045 ImplicationChecksByTransitivity, 4.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=100occurred in iteration=11, InterpolantAutomatonStates: 93, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 12 MinimizatonAttempts, 44 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 13 LocationsWithAnnotation, 64 PreInvPairs, 109 NumberOfFragments, 659 HoareAnnotationTreeSize, 64 FomulaSimplifications, 11657 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 13 FomulaSimplificationsInter, 2274 FormulaSimplificationTreeSizeReductionInter, 3.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 5.5s InterpolantComputationTime, 627 NumberOfCodeBlocks, 448 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 1063 ConstructedInterpolants, 0 QuantifiedInterpolants, 4781 SizeOfPredicates, 29 NumberOfNonLiveVariables, 1206 ConjunctsInSsa, 222 ConjunctsInUnsatCore, 19 InterpolantComputations, 4 PerfectInterpolantSequences, 4852/5286 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 33]: Loop Invariant Derived loop invariant: ((((((a <= 2) && (y == (((3 * n) + (3 * (n * n))) + 1))) && (n <= (a + 1))) && (0 <= a)) && (((((6 * (n * n)) + (n * 12)) + ((n * n) * n)) + 8) == (((2 * y) + x) + z))) && (((((3 * n) + (3 * (n * n))) + ((n * n) * n)) + 1) == (x + y))) RESULT: Ultimate proved your program to be correct! [2023-11-21 19:47:55,124 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75da388f-b710-4f8d-b3d2-21e1b1432679/bin/utaipan-verify-QoSU8krkJ5/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 Result: TRUE