./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 527bcce2 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd93f5a-0441-43e0-b4f9-a61928491b4f/bin/uautomizer-verify-bycVGegfSx/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd93f5a-0441-43e0-b4f9-a61928491b4f/bin/uautomizer-verify-bycVGegfSx/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd93f5a-0441-43e0-b4f9-a61928491b4f/bin/uautomizer-verify-bycVGegfSx/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd93f5a-0441-43e0-b4f9-a61928491b4f/bin/uautomizer-verify-bycVGegfSx/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound50.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd93f5a-0441-43e0-b4f9-a61928491b4f/bin/uautomizer-verify-bycVGegfSx/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd93f5a-0441-43e0-b4f9-a61928491b4f/bin/uautomizer-verify-bycVGegfSx --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a70bdaebce973cfb63a6da68866c665cdef037b6b862a38db5ed10fbf681a6e5 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 22:15:07,151 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 22:15:07,280 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd93f5a-0441-43e0-b4f9-a61928491b4f/bin/uautomizer-verify-bycVGegfSx/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-21 22:15:07,289 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 22:15:07,290 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 22:15:07,332 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 22:15:07,333 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 22:15:07,333 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 22:15:07,335 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-21 22:15:07,340 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-21 22:15:07,341 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 22:15:07,342 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 22:15:07,343 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-21 22:15:07,345 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-21 22:15:07,345 INFO L153 SettingsManager]: * Use SBE=true [2023-11-21 22:15:07,346 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 22:15:07,346 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-21 22:15:07,347 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 22:15:07,347 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 22:15:07,347 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 22:15:07,348 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 22:15:07,349 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-21 22:15:07,349 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 22:15:07,349 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-21 22:15:07,350 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 22:15:07,350 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-21 22:15:07,351 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 22:15:07,352 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 22:15:07,352 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-21 22:15:07,353 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 22:15:07,354 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 22:15:07,355 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:15:07,355 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 22:15:07,355 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 22:15:07,356 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-21 22:15:07,356 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-21 22:15:07,356 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 22:15:07,357 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 22:15:07,357 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-21 22:15:07,357 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-21 22:15:07,357 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-21 22:15:07,358 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 22:15:07,358 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_cbd93f5a-0441-43e0-b4f9-a61928491b4f/bin/uautomizer-verify-bycVGegfSx/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd93f5a-0441-43e0-b4f9-a61928491b4f/bin/uautomizer-verify-bycVGegfSx Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a70bdaebce973cfb63a6da68866c665cdef037b6b862a38db5ed10fbf681a6e5 [2023-11-21 22:15:07,624 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 22:15:07,658 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 22:15:07,661 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 22:15:07,662 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 22:15:07,663 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 22:15:07,664 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd93f5a-0441-43e0-b4f9-a61928491b4f/bin/uautomizer-verify-bycVGegfSx/../../sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound50.c [2023-11-21 22:15:10,940 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 22:15:11,231 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 22:15:11,233 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd93f5a-0441-43e0-b4f9-a61928491b4f/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound50.c [2023-11-21 22:15:11,245 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd93f5a-0441-43e0-b4f9-a61928491b4f/bin/uautomizer-verify-bycVGegfSx/data/d4fa0d8bc/1947e3f508314882a536acf9dccf3e13/FLAGa54ea895d [2023-11-21 22:15:11,276 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd93f5a-0441-43e0-b4f9-a61928491b4f/bin/uautomizer-verify-bycVGegfSx/data/d4fa0d8bc/1947e3f508314882a536acf9dccf3e13 [2023-11-21 22:15:11,287 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 22:15:11,290 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 22:15:11,296 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 22:15:11,296 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 22:15:11,303 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 22:15:11,304 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:15:11" (1/1) ... [2023-11-21 22:15:11,306 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27660593 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:15:11, skipping insertion in model container [2023-11-21 22:15:11,307 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:15:11" (1/1) ... [2023-11-21 22:15:11,340 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 22:15:11,573 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_cbd93f5a-0441-43e0-b4f9-a61928491b4f/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound50.c[458,471] [2023-11-21 22:15:11,596 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:15:11,610 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 22:15:11,627 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_cbd93f5a-0441-43e0-b4f9-a61928491b4f/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound50.c[458,471] [2023-11-21 22:15:11,638 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:15:11,658 INFO L206 MainTranslator]: Completed translation [2023-11-21 22:15:11,659 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:15:11 WrapperNode [2023-11-21 22:15:11,659 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 22:15:11,661 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 22:15:11,661 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 22:15:11,661 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 22:15:11,671 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:15:11" (1/1) ... [2023-11-21 22:15:11,683 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:15:11" (1/1) ... [2023-11-21 22:15:11,722 INFO L138 Inliner]: procedures = 14, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 43 [2023-11-21 22:15:11,723 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 22:15:11,724 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 22:15:11,724 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 22:15:11,725 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 22:15:11,739 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:15:11" (1/1) ... [2023-11-21 22:15:11,740 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:15:11" (1/1) ... [2023-11-21 22:15:11,743 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:15:11" (1/1) ... [2023-11-21 22:15:11,755 INFO L187 HeapSplitter]: Split 2 memory accesses to 1 slices as follows [2] [2023-11-21 22:15:11,757 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:15:11" (1/1) ... [2023-11-21 22:15:11,757 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:15:11" (1/1) ... [2023-11-21 22:15:11,761 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:15:11" (1/1) ... [2023-11-21 22:15:11,765 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:15:11" (1/1) ... [2023-11-21 22:15:11,767 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:15:11" (1/1) ... [2023-11-21 22:15:11,768 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:15:11" (1/1) ... [2023-11-21 22:15:11,771 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 22:15:11,772 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 22:15:11,772 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 22:15:11,775 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 22:15:11,777 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:15:11" (1/1) ... [2023-11-21 22:15:11,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:15:11,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd93f5a-0441-43e0-b4f9-a61928491b4f/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:15:11,817 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd93f5a-0441-43e0-b4f9-a61928491b4f/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 22:15:11,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd93f5a-0441-43e0-b4f9-a61928491b4f/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 22:15:11,861 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 22:15:11,861 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-21 22:15:11,862 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 22:15:11,862 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 22:15:11,862 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-21 22:15:11,862 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-21 22:15:11,953 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 22:15:11,957 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 22:15:12,183 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 22:15:12,280 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 22:15:12,281 INFO L308 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-21 22:15:12,283 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:15:12 BoogieIcfgContainer [2023-11-21 22:15:12,283 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 22:15:12,286 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 22:15:12,286 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 22:15:12,290 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 22:15:12,291 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 10:15:11" (1/3) ... [2023-11-21 22:15:12,292 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62ffa35b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:15:12, skipping insertion in model container [2023-11-21 22:15:12,292 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:15:11" (2/3) ... [2023-11-21 22:15:12,292 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62ffa35b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:15:12, skipping insertion in model container [2023-11-21 22:15:12,293 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:15:12" (3/3) ... [2023-11-21 22:15:12,294 INFO L112 eAbstractionObserver]: Analyzing ICFG ps5-ll_unwindbound50.c [2023-11-21 22:15:12,316 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 22:15:12,316 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-21 22:15:12,368 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 22:15:12,376 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=PETRI_NET, 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;@3f4ac9d0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 22:15:12,376 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-21 22:15:12,380 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 22:15:12,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-21 22:15:12,387 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:15:12,388 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-21 22:15:12,389 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:15:12,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:15:12,395 INFO L85 PathProgramCache]: Analyzing trace with hash -1749202120, now seen corresponding path program 1 times [2023-11-21 22:15:12,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:15:12,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817739091] [2023-11-21 22:15:12,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:15:12,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:15:12,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:12,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:15:12,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817739091] [2023-11-21 22:15:12,580 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-21 22:15:12,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503381536] [2023-11-21 22:15:12,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:15:12,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:15:12,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd93f5a-0441-43e0-b4f9-a61928491b4f/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:15:12,585 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd93f5a-0441-43e0-b4f9-a61928491b4f/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:15:12,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd93f5a-0441-43e0-b4f9-a61928491b4f/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-21 22:15:12,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:12,684 INFO L262 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-21 22:15:12,689 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:15:12,716 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 22:15:12,716 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:15:12,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503381536] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:15:12,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:15:12,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 22:15:12,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386478173] [2023-11-21 22:15:12,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:15:12,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-21 22:15:12,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:15:12,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-21 22:15:12,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-21 22:15:12,768 INFO L87 Difference]: Start difference. First operand has 15 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 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 22:15:12,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:15:12,796 INFO L93 Difference]: Finished difference Result 29 states and 42 transitions. [2023-11-21 22:15:12,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-21 22:15:12,799 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 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 22:15:12,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:15:12,806 INFO L225 Difference]: With dead ends: 29 [2023-11-21 22:15:12,806 INFO L226 Difference]: Without dead ends: 13 [2023-11-21 22:15:12,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-21 22:15:12,814 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 22:15:12,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 22:15:12,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2023-11-21 22:15:12,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2023-11-21 22:15:12,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.375) internal successors, (11), 9 states have internal predecessors, (11), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 22:15:12,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2023-11-21 22:15:12,854 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 6 [2023-11-21 22:15:12,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:15:12,854 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2023-11-21 22:15:12,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 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 22:15:12,855 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2023-11-21 22:15:12,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-21 22:15:12,856 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:15:12,856 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:15:12,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd93f5a-0441-43e0-b4f9-a61928491b4f/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-21 22:15:13,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd93f5a-0441-43e0-b4f9-a61928491b4f/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:15:13,057 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:15:13,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:15:13,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1208885392, now seen corresponding path program 1 times [2023-11-21 22:15:13,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:15:13,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653199916] [2023-11-21 22:15:13,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:15:13,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:15:13,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:13,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:15:13,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653199916] [2023-11-21 22:15:13,107 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-21 22:15:13,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703437079] [2023-11-21 22:15:13,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:15:13,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:15:13,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd93f5a-0441-43e0-b4f9-a61928491b4f/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:15:13,112 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd93f5a-0441-43e0-b4f9-a61928491b4f/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:15:13,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd93f5a-0441-43e0-b4f9-a61928491b4f/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-21 22:15:13,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:13,210 INFO L262 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-21 22:15:13,211 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:15:13,305 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 22:15:13,306 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:15:13,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703437079] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:15:13,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:15:13,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 22:15:13,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41156631] [2023-11-21 22:15:13,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:15:13,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 22:15:13,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:15:13,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 22:15:13,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 22:15:13,312 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 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 22:15:13,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:15:13,343 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2023-11-21 22:15:13,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 22:15:13,344 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 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 7 [2023-11-21 22:15:13,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:15:13,345 INFO L225 Difference]: With dead ends: 23 [2023-11-21 22:15:13,345 INFO L226 Difference]: Without dead ends: 15 [2023-11-21 22:15:13,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 22:15:13,349 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 22:15:13,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 22:15:13,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-11-21 22:15:13,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2023-11-21 22:15:13,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 22:15:13,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2023-11-21 22:15:13,359 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 7 [2023-11-21 22:15:13,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:15:13,359 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2023-11-21 22:15:13,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 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 22:15:13,360 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2023-11-21 22:15:13,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-21 22:15:13,361 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:15:13,361 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:15:13,385 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd93f5a-0441-43e0-b4f9-a61928491b4f/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-21 22:15:13,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd93f5a-0441-43e0-b4f9-a61928491b4f/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:15:13,586 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:15:13,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:15:13,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1210672852, now seen corresponding path program 1 times [2023-11-21 22:15:13,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:15:13,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997785361] [2023-11-21 22:15:13,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:15:13,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:15:13,613 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 22:15:13,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [315408772] [2023-11-21 22:15:13,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:15:13,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:15:13,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd93f5a-0441-43e0-b4f9-a61928491b4f/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:15:13,630 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd93f5a-0441-43e0-b4f9-a61928491b4f/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:15:13,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd93f5a-0441-43e0-b4f9-a61928491b4f/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-21 22:15:13,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:13,690 INFO L262 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-21 22:15:13,693 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:15:13,759 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 22:15:13,759 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:15:13,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:15:13,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997785361] [2023-11-21 22:15:13,760 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 22:15:13,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315408772] [2023-11-21 22:15:13,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315408772] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:15:13,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:15:13,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 22:15:13,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635882216] [2023-11-21 22:15:13,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:15:13,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 22:15:13,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:15:13,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 22:15:13,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:15:13,765 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 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 22:15:13,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:15:13,871 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2023-11-21 22:15:13,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 22:15:13,872 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 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 7 [2023-11-21 22:15:13,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:15:13,873 INFO L225 Difference]: With dead ends: 25 [2023-11-21 22:15:13,873 INFO L226 Difference]: Without dead ends: 21 [2023-11-21 22:15:13,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 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 22:15:13,879 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 6 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:15:13,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 45 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:15:13,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-11-21 22:15:13,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-11-21 22:15:13,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 22:15:13,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2023-11-21 22:15:13,894 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 7 [2023-11-21 22:15:13,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:15:13,895 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2023-11-21 22:15:13,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 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 22:15:13,895 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2023-11-21 22:15:13,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-21 22:15:13,897 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:15:13,897 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:15:13,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd93f5a-0441-43e0-b4f9-a61928491b4f/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-21 22:15:14,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd93f5a-0441-43e0-b4f9-a61928491b4f/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:15:14,122 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:15:14,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:15:14,122 INFO L85 PathProgramCache]: Analyzing trace with hash 479296502, now seen corresponding path program 1 times [2023-11-21 22:15:14,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:15:14,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392273392] [2023-11-21 22:15:14,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:15:14,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:15:14,144 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 22:15:14,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1050027448] [2023-11-21 22:15:14,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:15:14,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:15:14,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd93f5a-0441-43e0-b4f9-a61928491b4f/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:15:14,151 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd93f5a-0441-43e0-b4f9-a61928491b4f/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:15:14,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd93f5a-0441-43e0-b4f9-a61928491b4f/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-21 22:15:14,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:14,247 INFO L262 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-21 22:15:14,249 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:15:14,313 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:15:14,313 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:15:14,394 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:15:14,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:15:14,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392273392] [2023-11-21 22:15:14,395 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 22:15:14,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050027448] [2023-11-21 22:15:14,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050027448] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:15:14,395 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 22:15:14,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2023-11-21 22:15:14,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347318192] [2023-11-21 22:15:14,396 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 22:15:14,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-21 22:15:14,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:15:14,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-21 22:15:14,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-21 22:15:14,400 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 22:15:14,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:15:14,508 INFO L93 Difference]: Finished difference Result 55 states and 65 transitions. [2023-11-21 22:15:14,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-21 22:15:14,509 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15 [2023-11-21 22:15:14,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:15:14,511 INFO L225 Difference]: With dead ends: 55 [2023-11-21 22:15:14,511 INFO L226 Difference]: Without dead ends: 47 [2023-11-21 22:15:14,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-11-21 22:15:14,513 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 29 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:15:14,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 69 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:15:14,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-11-21 22:15:14,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2023-11-21 22:15:14,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 28 states have (on average 1.25) internal successors, (35), 31 states have internal predecessors, (35), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-21 22:15:14,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2023-11-21 22:15:14,534 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 15 [2023-11-21 22:15:14,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:15:14,534 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2023-11-21 22:15:14,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 22:15:14,535 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2023-11-21 22:15:14,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-21 22:15:14,536 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:15:14,537 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:15:14,564 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd93f5a-0441-43e0-b4f9-a61928491b4f/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-21 22:15:14,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd93f5a-0441-43e0-b4f9-a61928491b4f/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-11-21 22:15:14,757 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:15:14,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:15:14,758 INFO L85 PathProgramCache]: Analyzing trace with hash 481083962, now seen corresponding path program 1 times [2023-11-21 22:15:14,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:15:14,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519144246] [2023-11-21 22:15:14,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:15:14,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:15:14,773 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 22:15:14,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [610071875] [2023-11-21 22:15:14,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:15:14,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:15:14,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd93f5a-0441-43e0-b4f9-a61928491b4f/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:15:14,775 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd93f5a-0441-43e0-b4f9-a61928491b4f/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:15:14,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd93f5a-0441-43e0-b4f9-a61928491b4f/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-21 22:15:14,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:14,843 INFO L262 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-21 22:15:14,846 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:15:14,979 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:15:14,983 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:15:15,110 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-21 22:15:15,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:15:15,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519144246] [2023-11-21 22:15:15,111 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 22:15:15,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610071875] [2023-11-21 22:15:15,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610071875] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-21 22:15:15,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 22:15:15,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2023-11-21 22:15:15,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461672537] [2023-11-21 22:15:15,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:15:15,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 22:15:15,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:15:15,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 22:15:15,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-21 22:15:15,122 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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 22:15:15,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:15:15,202 INFO L93 Difference]: Finished difference Result 57 states and 65 transitions. [2023-11-21 22:15:15,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 22:15:15,203 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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 15 [2023-11-21 22:15:15,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:15:15,204 INFO L225 Difference]: With dead ends: 57 [2023-11-21 22:15:15,204 INFO L226 Difference]: Without dead ends: 49 [2023-11-21 22:15:15,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-21 22:15:15,206 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 7 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 22:15:15,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 33 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 22:15:15,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-11-21 22:15:15,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2023-11-21 22:15:15,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 32 states have internal predecessors, (34), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-21 22:15:15,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2023-11-21 22:15:15,232 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 15 [2023-11-21 22:15:15,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:15:15,232 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2023-11-21 22:15:15,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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 22:15:15,233 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2023-11-21 22:15:15,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-21 22:15:15,234 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:15:15,234 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:15:15,264 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd93f5a-0441-43e0-b4f9-a61928491b4f/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-21 22:15:15,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd93f5a-0441-43e0-b4f9-a61928491b4f/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:15:15,459 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:15:15,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:15:15,459 INFO L85 PathProgramCache]: Analyzing trace with hash 669026573, now seen corresponding path program 1 times [2023-11-21 22:15:15,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:15:15,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113557631] [2023-11-21 22:15:15,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:15:15,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:15:15,482 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 22:15:15,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1592515308] [2023-11-21 22:15:15,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:15:15,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:15:15,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd93f5a-0441-43e0-b4f9-a61928491b4f/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:15:15,486 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd93f5a-0441-43e0-b4f9-a61928491b4f/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:15:15,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd93f5a-0441-43e0-b4f9-a61928491b4f/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-21 22:15:15,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:15,554 INFO L262 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-21 22:15:15,556 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:15:15,707 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-21 22:15:15,707 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:15:15,868 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-21 22:15:15,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:15:15,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113557631] [2023-11-21 22:15:15,869 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 22:15:15,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592515308] [2023-11-21 22:15:15,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592515308] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:15:15,869 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 22:15:15,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2023-11-21 22:15:15,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195858995] [2023-11-21 22:15:15,870 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 22:15:15,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-21 22:15:15,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:15:15,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-21 22:15:15,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-11-21 22:15:15,873 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand has 10 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-21 22:15:16,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:15:16,087 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2023-11-21 22:15:16,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-21 22:15:16,088 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 26 [2023-11-21 22:15:16,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:15:16,090 INFO L225 Difference]: With dead ends: 53 [2023-11-21 22:15:16,090 INFO L226 Difference]: Without dead ends: 43 [2023-11-21 22:15:16,091 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2023-11-21 22:15:16,092 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 4 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:15:16,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 98 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:15:16,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-11-21 22:15:16,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2023-11-21 22:15:16,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 31 states have (on average 1.064516129032258) internal successors, (33), 31 states have internal predecessors, (33), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-21 22:15:16,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2023-11-21 22:15:16,117 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 26 [2023-11-21 22:15:16,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:15:16,118 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2023-11-21 22:15:16,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-21 22:15:16,118 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2023-11-21 22:15:16,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-21 22:15:16,120 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:15:16,121 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:15:16,151 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd93f5a-0441-43e0-b4f9-a61928491b4f/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-21 22:15:16,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd93f5a-0441-43e0-b4f9-a61928491b4f/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:15:16,346 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:15:16,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:15:16,346 INFO L85 PathProgramCache]: Analyzing trace with hash -783657828, now seen corresponding path program 1 times [2023-11-21 22:15:16,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:15:16,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112480722] [2023-11-21 22:15:16,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:15:16,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:15:16,378 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 22:15:16,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [876446014] [2023-11-21 22:15:16,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:15:16,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:15:16,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd93f5a-0441-43e0-b4f9-a61928491b4f/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:15:16,401 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd93f5a-0441-43e0-b4f9-a61928491b4f/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:15:16,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd93f5a-0441-43e0-b4f9-a61928491b4f/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-21 22:15:16,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:16,516 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-21 22:15:16,520 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:15:16,631 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-21 22:15:16,632 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:15:16,800 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-21 22:15:16,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:15:16,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112480722] [2023-11-21 22:15:16,801 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 22:15:16,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876446014] [2023-11-21 22:15:16,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876446014] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:15:16,802 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 22:15:16,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2023-11-21 22:15:16,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531428741] [2023-11-21 22:15:16,802 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 22:15:16,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-21 22:15:16,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:15:16,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-21 22:15:16,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-11-21 22:15:16,805 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 9 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2023-11-21 22:15:17,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:15:17,168 INFO L93 Difference]: Finished difference Result 129 states and 141 transitions. [2023-11-21 22:15:17,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-21 22:15:17,171 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 9 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 44 [2023-11-21 22:15:17,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:15:17,177 INFO L225 Difference]: With dead ends: 129 [2023-11-21 22:15:17,178 INFO L226 Difference]: Without dead ends: 119 [2023-11-21 22:15:17,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2023-11-21 22:15:17,180 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 65 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:15:17,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 106 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:15:17,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2023-11-21 22:15:17,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 94. [2023-11-21 22:15:17,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 66 states have (on average 1.106060606060606) internal successors, (73), 71 states have internal predecessors, (73), 17 states have call successors, (17), 11 states have call predecessors, (17), 10 states have return successors, (16), 11 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-21 22:15:17,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 106 transitions. [2023-11-21 22:15:17,241 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 106 transitions. Word has length 44 [2023-11-21 22:15:17,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:15:17,242 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 106 transitions. [2023-11-21 22:15:17,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 9 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2023-11-21 22:15:17,242 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 106 transitions. [2023-11-21 22:15:17,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-21 22:15:17,245 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:15:17,245 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:15:17,276 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd93f5a-0441-43e0-b4f9-a61928491b4f/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-21 22:15:17,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd93f5a-0441-43e0-b4f9-a61928491b4f/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:15:17,471 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:15:17,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:15:17,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1502128027, now seen corresponding path program 2 times [2023-11-21 22:15:17,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:15:17,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869227879] [2023-11-21 22:15:17,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:15:17,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:15:17,486 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 22:15:17,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [650170168] [2023-11-21 22:15:17,486 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-21 22:15:17,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:15:17,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd93f5a-0441-43e0-b4f9-a61928491b4f/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:15:17,488 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd93f5a-0441-43e0-b4f9-a61928491b4f/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:15:17,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd93f5a-0441-43e0-b4f9-a61928491b4f/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-21 22:15:17,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-21 22:15:17,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:15:17,625 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-21 22:15:17,629 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:15:17,911 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 11 proven. 56 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-21 22:15:17,912 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:15:18,612 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 11 proven. 56 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-21 22:15:18,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:15:18,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869227879] [2023-11-21 22:15:18,613 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 22:15:18,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650170168] [2023-11-21 22:15:18,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650170168] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:15:18,613 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 22:15:18,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2023-11-21 22:15:18,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798576014] [2023-11-21 22:15:18,614 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 22:15:18,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-21 22:15:18,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:15:18,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-21 22:15:18,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2023-11-21 22:15:18,617 INFO L87 Difference]: Start difference. First operand 94 states and 106 transitions. Second operand has 22 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 12 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-21 22:15:19,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:15:19,276 INFO L93 Difference]: Finished difference Result 101 states and 113 transitions. [2023-11-21 22:15:19,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-21 22:15:19,278 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 12 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 50 [2023-11-21 22:15:19,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:15:19,281 INFO L225 Difference]: With dead ends: 101 [2023-11-21 22:15:19,282 INFO L226 Difference]: Without dead ends: 89 [2023-11-21 22:15:19,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=172, Invalid=758, Unknown=0, NotChecked=0, Total=930 [2023-11-21 22:15:19,285 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 33 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-21 22:15:19,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 216 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-21 22:15:19,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-11-21 22:15:19,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2023-11-21 22:15:19,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 66 states have (on average 1.0151515151515151) internal successors, (67), 66 states have internal predecessors, (67), 12 states have call successors, (12), 11 states have call predecessors, (12), 10 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-21 22:15:19,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2023-11-21 22:15:19,346 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 50 [2023-11-21 22:15:19,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:15:19,347 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2023-11-21 22:15:19,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 12 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-21 22:15:19,348 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2023-11-21 22:15:19,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-11-21 22:15:19,359 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:15:19,359 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:15:19,372 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd93f5a-0441-43e0-b4f9-a61928491b4f/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-21 22:15:19,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd93f5a-0441-43e0-b4f9-a61928491b4f/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:15:19,567 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:15:19,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:15:19,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1775712440, now seen corresponding path program 2 times [2023-11-21 22:15:19,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:15:19,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237081769] [2023-11-21 22:15:19,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:15:19,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:15:19,588 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 22:15:19,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1588156899] [2023-11-21 22:15:19,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-21 22:15:19,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:15:19,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd93f5a-0441-43e0-b4f9-a61928491b4f/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:15:19,591 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd93f5a-0441-43e0-b4f9-a61928491b4f/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:15:19,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd93f5a-0441-43e0-b4f9-a61928491b4f/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-21 22:15:19,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-21 22:15:19,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:15:19,706 INFO L262 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-21 22:15:19,711 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:15:19,961 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 60 proven. 380 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-21 22:15:19,962 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:15:20,432 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 22 proven. 200 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2023-11-21 22:15:20,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:15:20,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237081769] [2023-11-21 22:15:20,433 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 22:15:20,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588156899] [2023-11-21 22:15:20,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588156899] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:15:20,433 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 22:15:20,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2023-11-21 22:15:20,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207905185] [2023-11-21 22:15:20,437 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 22:15:20,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-21 22:15:20,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:15:20,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-21 22:15:20,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2023-11-21 22:15:20,443 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand has 26 states, 26 states have (on average 4.0) internal successors, (104), 26 states have internal predecessors, (104), 21 states have call successors, (23), 12 states have call predecessors, (23), 12 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) [2023-11-21 22:15:21,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:15:21,109 INFO L93 Difference]: Finished difference Result 195 states and 207 transitions. [2023-11-21 22:15:21,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-11-21 22:15:21,110 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.0) internal successors, (104), 26 states have internal predecessors, (104), 21 states have call successors, (23), 12 states have call predecessors, (23), 12 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) Word has length 92 [2023-11-21 22:15:21,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:15:21,114 INFO L225 Difference]: With dead ends: 195 [2023-11-21 22:15:21,114 INFO L226 Difference]: Without dead ends: 185 [2023-11-21 22:15:21,116 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=796, Invalid=1366, Unknown=0, NotChecked=0, Total=2162 [2023-11-21 22:15:21,119 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 71 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 22:15:21,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 137 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 22:15:21,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2023-11-21 22:15:21,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2023-11-21 22:15:21,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 138 states have (on average 1.0072463768115942) internal successors, (139), 138 states have internal predecessors, (139), 24 states have call successors, (24), 23 states have call predecessors, (24), 22 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2023-11-21 22:15:21,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 186 transitions. [2023-11-21 22:15:21,195 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 186 transitions. Word has length 92 [2023-11-21 22:15:21,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:15:21,195 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 186 transitions. [2023-11-21 22:15:21,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.0) internal successors, (104), 26 states have internal predecessors, (104), 21 states have call successors, (23), 12 states have call predecessors, (23), 12 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) [2023-11-21 22:15:21,196 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 186 transitions. [2023-11-21 22:15:21,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2023-11-21 22:15:21,199 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:15:21,199 INFO L195 NwaCegarLoop]: trace histogram [24, 23, 23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:15:21,228 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd93f5a-0441-43e0-b4f9-a61928491b4f/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-21 22:15:21,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd93f5a-0441-43e0-b4f9-a61928491b4f/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:15:21,425 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:15:21,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:15:21,425 INFO L85 PathProgramCache]: Analyzing trace with hash 629115120, now seen corresponding path program 3 times [2023-11-21 22:15:21,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:15:21,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085799157] [2023-11-21 22:15:21,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:15:21,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:15:21,458 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 22:15:21,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [149057352] [2023-11-21 22:15:21,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-21 22:15:21,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:15:21,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd93f5a-0441-43e0-b4f9-a61928491b4f/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:15:21,460 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd93f5a-0441-43e0-b4f9-a61928491b4f/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:15:21,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd93f5a-0441-43e0-b4f9-a61928491b4f/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process